Cleanup old app and manage folder, no longer needed

core/application.mjs

@@ -1,13 +1,20 @@
 import { EventEmitter } from 'events'
 import fs from 'fs/promises'
+import { request } from './client.mjs'
 import HttpServer from './http.mjs'
+import { defaults } from './defaults.mjs'
 
 export default class Application extends EventEmitter {
-  constructor(util, db, provider, name, opts = {}) {
+  constructor(ctx, provider, name, opts = {}) {
     super()
-    this.util = util
-    this.db = db
-    this.config = db.config[name] || { }
+    this.ctx = {
+      db: ctx.db,
+      util: ctx.util,
+      log: ctx.log,
+      core: ctx.core,
+      app: this,
+    }
+    this.config = defaults({}, this.ctx.db.config[name])
     this.provider = provider
     this.name = name
     this.updating = false
@@ -26,14 +33,18 @@ export default class Application extends EventEmitter {
 
     // Apply defaults to config
     this.config.updateEvery = this.config.updateEvery || 180
-    this.config.waitUntilFail = this.config.waitUntilFail || (60 * 1000)
+    this.config.startWaitUntilFail = this.config.startWaitUntilFail || (60 * 1000)
+    this.config.heartbeatTimeout = this.config.heartbeatTimeout || (3 * 1000)
+    this.config.heartbeatAttempts = this.config.heartbeatAttempts || 5
+    this.config.heartbeatAttemptsWait = this.config.heartbeatAttemptsWait || (2 * 1000)
+    this.config.heartbeatPath = this.config.heartbeatPath || '/'
 
     Object.assign(this, {
       setInterval: opts.setInterval || setInterval,
       fs: opts.fs || fs,
     })
 
-    this.db.addApplication(name)
+    this.ctx.db.addApplication(name)
   }
 
   startAutoupdater() {
@@ -42,10 +53,10 @@ export default class Application extends EventEmitter {
     let timer = this.setInterval(() => {
       this.update().then(
         () => {
-          this.db.data.core[this.name].updater += 'Automatic update finished successfully. '
+          this.ctx.db.data.core[this.name].updater += 'Automatic update finished successfully. '
         },
         (err) => {
-          this.db.data.core[this.name].updater += 'Error while running automatic update: ' + err.message + '. '
+          this.ctx.db.data.core[this.name].updater += 'Error while running automatic update: ' + err.message + '. '
         }
       )
     }, this.config.updateEvery * 60 * 1000)
@@ -53,8 +64,8 @@ export default class Application extends EventEmitter {
   }
 
   updateLog(message) {
-    this.db.data.core[this.name].updater += message
-    this.db.log.info(message)
+    this.ctx.db.data.core[this.name].updater += message
+    this.ctx.db.log.info(message)
     return message
   }
 
@@ -62,10 +73,10 @@ export default class Application extends EventEmitter {
 
   update() {
     if (this.provider.static) {
-      if (this.db.data.core[this.name].updater !== this.msgStatic) {
-        this.db.data.core[this.name].updater = ''
+      if (this.ctx.db.data.core[this.name].updater !== this.msgStatic) {
+        this.ctx.db.data.core[this.name].updater = ''
         this.updateLog(this.msgStatic)
-        return this.db.write()
+        return this.ctx.db.write()
       }
       return Promise.resolve()
     }
@@ -76,11 +87,11 @@ export default class Application extends EventEmitter {
     return this._update()
       .then(() => {
         this.updating = false
-        return this.db.write()
+        return this.ctx.db.write()
       })
       .catch((err) => {
         this.updating = false
-        return this.db.write()
+        return this.ctx.db.write()
           .then(function() { return Promise.reject(err) })
       })
   }
@@ -96,7 +107,7 @@ export default class Application extends EventEmitter {
   }
 
   async _update() {
-    this.db.data.core[this.name].updater = ''
+    this.ctx.db.data.core[this.name].updater = ''
     let cleanup = true
     let folder = ''
     let log = ''
@@ -111,7 +122,7 @@ export default class Application extends EventEmitter {
       log += this.updateLog(`Found ${latest.version}. `) + '\n'
 
       // If the versino matches the latest installed, then there's nothing to do
-      if (this.db.data.core[this.name].latestInstalled === latest.version) {
+      if (this.ctx.db.data.core[this.name].latestInstalled === latest.version) {
         this.updateLog('Already up to date, nothing to do. ')
         return
       }
@@ -121,7 +132,7 @@ export default class Application extends EventEmitter {
       latest.id = latest.version
 
       // check to see if we already have this version in our database.
-      var found = this.db.get(this.db.data.core[this.name].versions, latest.id)
+      var found = this.ctx.db.get(this.ctx.db.data.core[this.name].versions, latest.id)
       if (found) {
         // Check if the existing version found was already installed.
         if (found.installed) {
@@ -155,18 +166,18 @@ export default class Application extends EventEmitter {
       } else {
         // This is a new version, mark it with stable tag of zero.
         latest.stable = 0
-        this.db.upsertFirst(this.db.data.core[this.name].versions, latest)
+        this.ctx.db.upsertFirst(this.ctx.db.data.core[this.name].versions, latest)
       }
 
       // The target file for the archive and the target folder for new our version
-      let target = this.util.getPathFromRoot(`./${this.name}/${latest.version}/file${this.util.getExtension(latest.filename)}`)
-      folder = this.util.getPathFromRoot(`./${this.name}/${latest.version}`)
+      let target = this.ctx.util.getPathFromRoot(`./${this.name}/${latest.version}/file${this.ctx.util.getExtension(latest.filename)}`)
+      folder = this.ctx.util.getPathFromRoot(`./${this.name}/${latest.version}`)
 
       // Create it in case it does not exist.
       await this.fs.mkdir(folder, { recursive: true })
 
       log += this.updateLog(`Downloading ${latest.link} to ${target}. `) + '\n'
-      await this.db.write()
+      await this.ctx.db.write()
 
       // Download the latest version using the provider in question.
       await this.provider.downloadVersion(latest, target)
@@ -176,10 +187,10 @@ export default class Application extends EventEmitter {
         })
 
       log += '\n' + this.updateLog(`Extracting ${target}. `) + '\n'
-      await this.db.write()
+      await this.ctx.db.write()
 
       // Download was successful, extract the archived file that we downloaded
-      await this.util.extractFile(target, function(msg) {
+      await this.ctx.util.extractFile(target, function(msg) {
         log += msg
       }).catch(function(err) {
         latest.failtodownload = (latest.failtodownload || 0) + 1
@@ -196,7 +207,7 @@ export default class Application extends EventEmitter {
       // check if the version we downloaded had index.mjs. If this is
       // missing then either the extracting or download failed without erroring
       // or the archived is borked.
-      await this.fs.stat(this.util.getPathFromRoot(`./${this.name}/${latest.version}/index.mjs`))
+      await this.fs.stat(this.ctx.util.getPathFromRoot(`./${this.name}/${latest.version}/index.mjs`))
         .catch((err) => {
           latest.failtodownload = (latest.failtodownload || 0) + 1
           log += this.updateLog('Version did not include or was missing index.mjs. ') + '\n'
@@ -212,16 +223,16 @@ export default class Application extends EventEmitter {
       // Check if we have a package.json file. If we do, we need to run
       // npm install. If we don't then this application either has all the
       // required packages or it doesn't need them to run
-      let packageStat = await this.fs.stat(this.util.getPathFromRoot(`./${this.name}/${latest.version}/package.json`))
+      let packageStat = await this.fs.stat(this.ctx.util.getPathFromRoot(`./${this.name}/${latest.version}/package.json`))
         .catch(function() { return null })
 
       if (packageStat) {
         log += this.updateLog(`running npm install --production. `) + '\n'
-        await this.db.write()
+        await this.ctx.db.write()
 
         // For some weird reason, --loglevel=notice is required otherwise
         // we get practically zero log output.
-        await this.util.runCommand(
+        await this.ctx.util.runCommand(
           'npm.cmd',
           ['install', '--production', '--no-optional', '--no-package-lock', '--no-audit', '--loglevel=notice'],
           folder,
@@ -255,33 +266,45 @@ export default class Application extends EventEmitter {
     // If we reached here then everything went swimmingly. Mark the version
     // as being installed and attach the install log to it.
     log += this.updateLog(`Finished updating ${this.name} to version ${latest.version}.`) + '\n'
-    this.db.data.core[this.name].latestInstalled = latest.version
+    this.ctx.db.data.core[this.name].latestInstalled = latest.version
     latest.installed = true
     latest.log = log
   }
 
-  registerModule(module) {
+  registerModule(module, version = '') {
     if (module && typeof(module) === 'function') {
       return this.registerModule({ start: module })
     }
     if (!module || typeof(module) !== 'object' || typeof(module.start) !== 'function') {
-      throw new Error(`Application ${this.name} registerModule was called with a non module missing start function`)
+      throw new Error(`Application ${this.name}${version ? ' version ' + version : '' } registerModule was called with a non module missing start function`)
     }
 
     this.module = module
   }
 
   async runVersion(version) {
-    let module = this.module
+    this.ctx.db.data.core[this.name].active = version
+    await this.ctx.db.write()
 
-    let errTimeout = new Error(`Application ${this.name} version ${version} timed out (took over ${this.config.waitUntilFail}ms) while running start()`)
+    if (version !== 'static') {
+      let indexPath = this.ctx.util.getPathFromRoot(`./${this.name}/${version}/index.mjs`)
+      await this.fs.stat(indexPath).catch((err) => {
+        return Promise.reject(new Error(`Application ${this.name} version ${version} was missing index.mjs: ${err.message}`))
+      })
+      let module = await import(this.ctx.util.getUrlFromRoot(`./${this.name}/${version}/index.mjs`)).catch((err) => {
+        return Promise.reject(new Error(`Application ${this.name} version ${version} failed to load index.mjs: ${err.message}`))
+      })
+      this.registerModule(module, version)
+    }
+
+    let errTimeout = new Error(`Application ${this.name} version ${version} timed out (took over ${this.config.startWaitUntilFail}ms) while running start()`)
 
     await new Promise((res, rej) => {
       setTimeout(() => {
         rej(errTimeout)
-      }, this.config.waitUntilFail)
+      }, this.config.startWaitUntilFail)
 
-      let startRes = module.start(this.db, this.db.log, this.http, this.config.port)
+      let startRes = this.module.start(this.http, this.config.port, this.ctx)
       if (startRes && startRes.then) {
         return startRes.then(res, rej)
       }
@@ -291,5 +314,22 @@ export default class Application extends EventEmitter {
     if (!this.http.active) {
       return Promise.reject(new Error(`Application ${this.name} version ${version} did not call http.createServer()`))
     }
+
+    let lastErr = null
+
+    for (let i = 0; i < this.config.heartbeatAttempts; i++) {
+      try {
+        await request({ timeout: this.config.heartbeatAttemptsWait }, `http://localhost:${this.config.port}` + this.config.heartbeatPath, null, 0, true)
+        return
+      } catch (err) {
+        lastErr = err
+      }
+    }
+
+    return Promise.reject(new Error(`Application ${this.name} version ${version} failed to start properly: ${lastErr.message}`))
+  }
+
+  closeServer() {
+    return this.http.closeServer()
   }
 }

core/client.mjs

@@ -46,13 +46,13 @@ export function request(config, path, filePath = null, redirects, fastRaw = fals
     if (config.token) {
       headers['Authorization'] = `token ${config.token}`
     }
-    let timeout = fastRaw ? 5000 : config.timeout || 10000
+    let timeout = config.timeout || 10000
 
     let timedout = false
     let timer = setTimeout(function() {
       timedout = true
       if (req) { req.destroy() }
-      reject(new Error(`Request ${path} timed out out after ${timeout}`))
+      reject(new Error(`Request ${path} timed out after ${timeout}ms`))
     }, timeout)
 
     req = h.request({

core/core.mjs

@@ -1,499 +1,68 @@
-import fs from 'fs'
-import { EventEmitter } from 'events'
-import { request } from './client.mjs'
-import HttpServer from './http.mjs'
+import Application from './application.mjs'
+import Util from './util.mjs'
+import { Low } from 'lowdb'
 
-const fsp = fs.promises
+export default class Core {
+  static providers = new Map()
+  static addProvider(name, provider) {
+    if (!name || typeof(name) !== 'string')
+      throw new Error('addProvider name must be a string')
+    if (typeof(provider) !== 'function')
+      throw new Error(`addProvider ${name} provider must be a class`)
+
+    let test = new provider({})
+    if (typeof(test.checkConfig) !== 'function')
+      throw new Error(`addProvider ${name} provider class missing checkConfig`)
+    if (typeof(test.getLatestVersion) !== 'function')
+      throw new Error(`addProvider ${name} provider class missing getLatestVersion`)
+
+    Core.providers.set(name, provider)
+  }
+
+  constructor(db, util, log, restart) {
+    // some sanity checks
+    if (typeof(restart) !== 'function') throw new Error('restart parameter was not a function')
+    if (!log || typeof(log) !== 'object') throw new Error('log parameter was invalid')
+    if (typeof(log.event) !== 'object') throw new Error('log parameter was invalid')
+    if (typeof(log.info) !== 'function'
+      || typeof(log.warn) !== 'function'
+      || typeof(log.error) !== 'function'
+      || typeof(log.event.info) !== 'function'
+      || typeof(log.event.warn) !== 'function'
+      || typeof(log.event.error) !== 'function') throw new Error('log parameter was invalid')
+    if (!util || !(util instanceof Util)) throw new Error('util not instance of Util')
+    if (!db || !(db instanceof Low)) throw new Error('db not instance of Low')
 
-export default class Core extends EventEmitter{
-  constructor(util, config, db, log, closeCb) {
-    super()
-    process.stdin.resume()
-    this.http = new HttpServer()
-    this.util = util
-    this.config = config
     this.db = db
+    this.util = util
     this.log = log
-    this._close = closeCb
-    this._activeCrashHandler = null
-    this.appRunning = false
-    this.manageRunning = false
-    this.monitoring = false
-    this._appUpdating = {
-      fresh: true,
-      updating: false,
-      starting: false,
-      logs: '',
-    }
-    this._manageUpdating = {
-      fresh: true,
-      updating: false,
-      starting: false,
-      logs: '',
+    this.restart = restart
+    this.applications = []
+    this.applicationMap = new Map()
   }
 
-    this.db.set('core.manageActive', null)
-           .set('core.appActive', null)
-           .write().then()
+  getApplication(name) {
+    return this.applicationMap.get(name)
   }
 
-  startMonitor() {
-    if (this.monitoring) return
-    this.log.info('[Scheduler] Automatic updater has been turned on. Will check for updates every 3 hours')
-    let updating = false
+  async init() {
+    this.util.verifyConfig(this.db.config)
 
-    this.monitoring = setInterval(async () => {
-      if (updating) return
-      updating = true
-      this.log.info('[Scheduler] Starting automatic check for latest version of app and manage')
+    let names = this.util.getAppNames(this.db.config)
 
-      try {
-        await this.installLatestVersion('app')
-        await this.installLatestVersion('manage')
-      } catch(err) {
-        this.log.error(err, 'Error checking for latest versions')
-        this.log.event.error('Error checking for latest versions: ' + err.message)
-        updating = false
-        return
-      }
+    for (let name of names) {
+      let provConstructor = Core.providers.get(this.db.config[name].provider)
+      let provider = new provConstructor(this.db.config[name])
+      await provider.checkConfig(this.db.config[name])
 
-      try {
-        if (this.hasNewVersionAvailable('app') || !this.appRunning) {
-          await this.tryStartProgram('app')
-        }
-      } catch(err) {
-        this.log.error(err, 'Unknown error occured attempting to app')
-        this.log.event.error('Unknown error starting app: ' + err.message)
-      }
-      try {
-        if (this.hasNewVersionAvailable('manage') || !this.manageRunning) {
-          await this.tryStartProgram('manage')
-        }
-      } catch(err) {
-        this.log.error(err, 'Unknown error occured attempting to start manage')
-        this.log.event.error('Unknown error starting manage: ' + err.message)
-      }
-      updating = false
-    }, 1000 * 60 * 60 * 3) // every 3 hours
-  }
-
-  restart() {
-    this._close()
-  }
-
-  status() {
-    return {
-      app: this.appRunning,
-      manage: this.manageRunning,
-      appUpdating: this._appUpdating.updating,
-      manageUpdating: this._manageUpdating.updating,
-      appStarting: this._appUpdating.starting,
-      manageStarting: this._manageUpdating.starting,
-    }
-  }
-
-  async getLatestVersion(active, name) {
-    // Example: 'https://api.github.com/repos/thething/sc-helloworld/releases'
-    this.logActive(name, active, `Updater: Fetching release info from: https://api.github.com/repos/${this.config[name + 'Repository']}/releases\n`)
-
-    let result = await request(this.config, `https://api.github.com/repos/${this.config[name + 'Repository']}/releases`)
-
-    let items = result.body.filter(function(item) {
-      if (!item.assets.length) return false
-      for (let i = 0; i < item.assets.length; i++) {
-        if (item.assets[i].name.endsWith('-sc.zip')) return true
-      }
-    })
-
-    if (items && items.length) {
-      for (let x = 0; x < items.length; x++) {
-        let item = items[x]
-        for (let i = 0; i < item.assets.length; i++) {
-          if (item.assets[i].name.endsWith('-sc.zip')) {
-            if (this.db.get('core.' + name + 'LatestInstalled').value() === item.name) {
-              this.logActive(name, active, `Updater: Latest version already installed, exiting early\n`)
-              return null
-            }
-            this.logActive(name, active, `Updater: Found version ${item.name} with file ${item.assets[i].name}\n`)
-  
-            await this.db.set(`core.${name}LatestVersion`, item.name)
-                    .write()
-            this.emit('dbupdated', {})
-
-            return {
-              name: item.name,
-              filename: item.assets[i].name,
-              url: item.assets[i].browser_download_url,
-              description: item.body,
-            }
-          }
-        }
-      }
-    } else {
-      return null
-    }
-  }
-
-  logActive(name, active, logline, doNotPrint = false) {
-    if (!doNotPrint) {
-      this.log.info(`[${name}] ` + logline.replace(/\n/g, ''))
-    }
-    active.logs += logline
-    this.emit(name + 'log', active)
-  }
-
-  getProgramLogs(name) {
-    if (name === 'app' && this._appUpdating.logs) {
-      return this._appUpdating.logs
-    } else if (name === 'manage' && this._manageUpdating.logs) {
-      return this._manageUpdating.logs
-    }
-
-    let latestInstalled = this.db.get('core.' + name + 'LatestInstalled').value()
-    let latestVersion = this.db.get('core.' + name + 'LatestVersion').value()
-    if (latestVersion) {
-      let value = this.db.get(`core_${name}History`).getById(latestVersion).value()
-      if (value) return value.logs
-    }
-    if (latestInstalled) {
-      let value = this.db.get(`core_${name}History`).getById(latestInstalled).value()
-      if (value) return value.logs
-    }
-    return '< no logs found >'
-  }
-
-  async installVersion(name, active, version) {
-    if (fs.existsSync(this.util.getPathFromRoot(`./${name}/` + version.name))) {
-      await this.util.runCommand('rmdir', ['/S', '/Q', `"${this.util.getPathFromRoot(`./${name}/` + version.name)}"`])
-    }
-    if (!fs.existsSync(this.util.getPathFromRoot(`./${name}/`))) {
-      await fsp.mkdir(this.util.getPathFromRoot(`./${name}/`))
-    }
-    try {
-      await fsp.mkdir(this.util.getPathFromRoot(`./${name}/` + version.name))
-    } catch(err) {
-      if (err.code !== 'EEXIST') {
-        throw err
-      }
-    }
-    // await fsp.mkdir(this.util.getPathFromRoot(`./${name}/` + version.name + '/node_modules'))
-    this.logActive(name, active, `Installer: Downloading ${version.name} (${version.url}) to ${version.name + '/' + version.name + '.zip'}\n`)
-    let filePath = this.util.getPathFromRoot(`./${name}/` + version.name + '/' + version.name + '.zip')
-    await request(this.config, version.url, filePath)
-    this.logActive(name, active, `Installer: Downloading finished, starting extraction\n`)
-    await this.util.runCommand(
-      '"C:\\Program Files\\7-Zip\\7z.exe"',
-      ['x', `"${filePath}"`],
-      this.util.getPathFromRoot(`./${name}/` + version.name + '/'),
-      this.logActive.bind(this, name, active)
-    )
-
-    if (!fs.existsSync(this.util.getPathFromRoot(`./${name}/` + version.name + '/index.mjs'))) {
-      this.logActive(name, active, `\nInstaller: ERROR: Missing index.mjs in the folder, exiting\n`)
-      throw new Error(`Missing index.mjs in ${this.util.getPathFromRoot(`./${name}/` + version.name + '/index.mjs')}`)
-    }
-
-    this.logActive(name, active, `\nInstaller: Starting npm install\n`)
-    
-    await this.util.runCommand(
-      'npm.cmd',
-      ['install', '--production', '--no-optional', '--no-package-lock', '--no-audit'],
-      this.util.getPathFromRoot(`./${name}/` + version.name + '/'),
-      this.logActive.bind(this, name, active)
-    )
-    
-    await this.db.set(`core.${name}LatestInstalled`, version.name)
-                  .write()
-    this.emit('dbupdated', {})
-    
-    this.logActive(name, active, `\nInstaller: Successfully installed ${version.name}\n`)
-  }
-
-  getActive(name) {
-    if (name === 'app') {
-      return this._appUpdating
-    } else if (name === 'manage') {
-      return this._manageUpdating
-    } else {
-      throw new Error('Invalid name: ' + name)
-    }
-  }
-
-  async startModule(module, port) {
-    let out = await module.start(this.config, this.db, this.log, this, this.http, port)
-    if (out && out.then) {
-      await out
-    }
-    if (!this.http.getCurrentServer()) {
-      this.log.warn('Module did not call http.createServer')
-    }
-  }
-
-  hasNewVersionAvailable(name) {
-    let newestVersion = this.db.get(`core.${name}LatestInstalled`).value()
-    if (!newestVersion) return false
-
-    let history = this.db.get(`core_${name}History`).getById(newestVersion).value()
-    if (history.installed && history.stable === 0) {
-      return true
-    }
-    return false
-  }
-  
-  async tryStartProgram(name) {
-    let active = this.getActive(name)
-
-    if (this[name + 'Running'] && !this.hasNewVersionAvailable(name)) {
-      this.log.event.warn('Attempting to start ' + name + ' which is already running')
-      this.log.warn('Attempting to start ' + name + ' which is already running')
-      this.logActive(name, active, `Runner: Attempting to start it but it is already running\n`, true)
-      return
-    }
-    active.starting = true
-
-    if (this[name + 'Running']) {
-      let success = await this.http.closeServer(name)
-      if (!success) {
-        if (process.env.NODE_ENV === 'production') {
-          this.logActive(name, active, `Runner: Found new version but server could not be shut down, restarting service core\n`)
-          await new Promise(() => {
-            this.log.event.warn('Found new version of ' + name + ' but server could not be shut down gracefully, restarting...', null, () => {
-              process.exit(100)
-            })
-          })
-        } else {
-          this.logActive(name, active, `Runner: Found new version but server could not be shut down\n`)
-          return
-        }
-      }
-      this[name + 'Running'] = false
-      this.emit('statusupdated', {})
-    }
-
-    let history = this.db.get(`core_${name}History`)
-        .filter('installed')
-        .orderBy('installed', 'desc')
-        .value()
-    this.logActive(name, active, `Runner: Finding available version\n`)
-
-    for (let i = 0; i < history.length; i++) {
-      if ((history[i].stable === -1 && !active.fresh)
-          || (history[i].stable < -1)) {
-        this.logActive(name, active, `Runner: Skipping version ${history[i].name} due to marked as unstable\n`)
-        continue
-      }
-
-      await this.db.set(`core.${name}Active`, history[i].name)
-                    .write()
-      this.emit('dbupdated', {})
-
-      let running = await this.tryStartProgramVersion(name, active, history[i].name)
-      if (running) {
-        history[i].stable = 1
-      } else {
-        if (active.fresh || history[i].stable === -1) {
-          history[i].stable = -2
-        } else {
-          history[i].stable = -1
-        }
-        await this.db.set(`core.${name}Active`, null)
-                    .write()
-        this.emit('dbupdated', {})
-      }
-      active.fresh = false
-
-      await this.db.get(`core_${name}History`).updateById(history[i].id, history[i].stable).write()
-      if (history[i].stable > 0) break
-    }
-
-    if (!this.db.get(`core.${name}Active`).value()) {
-      this.logActive(name, active, `Runner: Could not find any available stable version of ${name}\n`)
-      this.log.error('Unable to start ' + name)
-      this.log.event.error('Unable to start ' + name)
-    }
-
-    active.starting = false
-  }
-
-  programCrashed(name, version, active, oldStable) {
-    let newStable = -2
-    console.log('EXITING:', oldStable, active)
-    if (oldStable === 0 && !active.fresh) {
-      newStable = -1
-    }
-    let temp = this.db.get(`core_${name}History`).getById(version).set('stable', newStable )
-    temp.value() // Trigger update on __wrapped__
-    fs.writeFileSync(this.db.adapterFilePath, JSON.stringify(temp.__wrapped__, null, 2))
-  }
-
-  async tryStartProgramVersion(name, active, version) {
-    if (!version) return false
-    this.logActive(name, active, `Runner: Attempting to start ${version}\n`)
-    let indexPath = this.util.getUrlFromRoot(`./${name}/` + version + '/index.mjs')
-    let module
-
-    try {
-      this.logActive(name, active, `Runner: Loading ${indexPath}\n`)
-      module = await import(indexPath)
-    } catch (err) {
-      this.logActive(name, active, `Runner: Error importing module\n`, true)
-      this.logActive(name, active, `${err.stack}\n`, true)
-      this.log.error(err, `Failed to load ${indexPath}`)
-      return false
-    }
-
-    let checkTimeout = null
-    let oldStable = this.db.get(`core_${name}History`).getById(version).value().stable
-    this._activeCrashHandler = this.programCrashed.bind(this, name, version, active, oldStable)
-    process.once('exit', this._activeCrashHandler)
-    try {
-      let port = name === 'app' ? this.config.port : this.config.managePort
-      await new Promise((res, rej) => {
-        checkTimeout = setTimeout(function() {
-          rej(new Error('Program took longer than 60 seconds to resolve promise'))
-        }, 60 * 1000)
-
-        this.logActive(name, active, `Runner: Starting module\n`)
-
-        try {
-          this.http.setContext(name)
-          this.startModule(module, port)
-              .then(res, rej)
-        } catch (err) {
-          rej(err)
-        }
-      })
-      clearTimeout(checkTimeout)
-
-      await this.checkProgramRunning(name, active, port)
-      process.off('exit', this._activeCrashHandler)
-    } catch (err) {
-      clearTimeout(checkTimeout)
-      process.off('exit', this._activeCrashHandler)
-      await this.http.closeServer(name)
-
-      this.logActive(name, active, `Runner: Error starting\n`, true)
-      this.logActive(name, active, `${err.stack}\n`, true)
-      this.log.error(err, `Failed to start ${name}`)
-      return false
-    }
-    this._activeCrashHandler = null
-    
-    this.logActive(name, active, `Runner: Successfully started version ${version}\n`)
-    await this.db.set(`core.${name}Active`, version)
-                  .write()
-
-    if (name === 'app') {
-      this.appRunning = true
-    } else {
-      this.manageRunning = true
-    }
-    this.emit('statusupdated', {})
-
-    this.logActive(name, active, `Runner: Module is running successfully\n`)
-    
-    return true
-  }
-
-  async checkProgramRunning(name, active, port) {
-    this.logActive(name, active, `Checker: Testing out module port ${port}\n`)
-    let start = new Date()
-    let error = null
-    let success = false
-
-    while (new Date() - start < 10 * 1000) {
-      try {
-        let check = await request(this.config, `http://localhost:${port}`, null, 0, true)
-        success = true
-        break
-      } catch(err) {
-        this.logActive(name, active, `Checker: ${err.message}, retrying in 3 seconds\n`)
-        error = err
-        await new Promise(function(res) { setTimeout(res, 3000)})
-      }
-    }
-    if (success) return true
-    throw error || new Error('Checking server failed')
-  }
-
-  async installLatestVersion(name) {
-    if (!this.config[name + 'Repository']) {
-      if (name === 'app') {
-        this.log.error(name + ' Repository was missing from config')
-        this.log.event.error(name + ' Repository was missing from config')
-      } else {
-        this.log.warn(name + ' Repository was missing from config')
-        this.log.event.warn(name + ' Repository was missing from config')
-      }
-      return
-    }
-
-    let active = this.getActive(name)
-    let oldLogs = active.logs || ''
-    if (oldLogs) {
-      oldLogs += '\n'
-    }
-    active.logs = ''
-    active.updating = true
-
-    this.emit('statusupdated', {})
-    this.logActive(name, active, `Installer: Checking for updates at time: ${new Date().toISOString().replace('T', ' ').split('.')[0]}\n`)
-
-    let version = null
-    let installed = false
-    let found = false
-    try {
-      version = await this.getLatestVersion(active, name)
-      if (version) {
-        let core = this.db.get('core').value()
-        let fromDb = this.db.get(`core_${name}History`).getById(version.name).value()
-        if (!fromDb || !fromDb.installed) {
-          let oldVersion = core[name + 'Current'] || '<none>'
-          this.logActive(name, active, `Installer: Updating from ${oldVersion} to ${version.name}\n`)
-          await this.installVersion(name, active, version)
-          this.logActive(name, active, `Installer: Finished: ${new Date().toISOString().replace('T', ' ').split('.')[0]}\n`)
-          installed = new Date()
-        } else {
-          found = true
-          this.logActive(name, active, `Installer: Version ${version.name} already installed\n`)
-        }
-      }
-    } catch(err) {
-      this.logActive(name, active, '\n', true)
-      this.logActive(name, active, `Installer: Exception occured while updating ${name}\n`, true)
-      this.logActive(name, active, err.stack, true)
-      this.log.error('Error while updating ' + name, err)
-    }
-    active.updating = false
-    if (version && !found) {
-      await this.db.get(`core_${name}History`).upsert({
-        id: version.name,
-        name: version.name,
-        filename: version.filename,
-        url: version.url,
-        description: version.description,
-        logs: active.logs,
-        stable: 0,
-        installed: installed && installed.toISOString(),
-      }).write()
-    }
-    active.logs = oldLogs + active.logs
-    this.emit(name + 'log', active)
-    this.emit('statusupdated', {})
-  }
-
-  async start(name) {
-    var version = this.db.get('core.' + name + 'LatestInstalled').value()
-    if (version) {
-      await this.tryStartProgram(name)
-    }
-
-    await this.installLatestVersion(name)
-
-    if (version !== this.db.get('core.' + name + 'LatestInstalled').value()) {
-      if (!this[name + 'Running'] || this.hasNewVersionAvailable(name)) {
-        await this.tryStartProgram(name)
-      }
+      let application = new Application({
+        db: this.db,
+        util: this.util,
+        log: this.log,
+        core: this,
+      }, provider, name)
+      this.applications.push(application)
+      this.applicationMap.set(name, application)
     }
   }
 }

core/core_old.mjs

@@ -0,0 +1,499 @@
+import fs from 'fs'
+import { EventEmitter } from 'events'
+import { request } from './client.mjs'
+import HttpServer from './http.mjs'
+
+const fsp = fs.promises
+
+export default class Core extends EventEmitter{
+  constructor(util, config, db, log, closeCb) {
+    super()
+    process.stdin.resume()
+    this.http = new HttpServer()
+    this.util = util
+    this.config = config
+    this.db = db
+    this.log = log
+    this._close = closeCb
+    this._activeCrashHandler = null
+    this.appRunning = false
+    this.manageRunning = false
+    this.monitoring = false
+    this._appUpdating = {
+      fresh: true,
+      updating: false,
+      starting: false,
+      logs: '',
+    }
+    this._manageUpdating = {
+      fresh: true,
+      updating: false,
+      starting: false,
+      logs: '',
+    }
+
+    this.db.set('core.manageActive', null)
+           .set('core.appActive', null)
+           .write().then()
+  }
+
+  startMonitor() {
+    if (this.monitoring) return
+    this.log.info('[Scheduler] Automatic updater has been turned on. Will check for updates every 3 hours')
+    let updating = false
+
+    this.monitoring = setInterval(async () => {
+      if (updating) return
+      updating = true
+      this.log.info('[Scheduler] Starting automatic check for latest version of app and manage')
+
+      try {
+        await this.installLatestVersion('app')
+        await this.installLatestVersion('manage')
+      } catch(err) {
+        this.log.error(err, 'Error checking for latest versions')
+        this.log.event.error('Error checking for latest versions: ' + err.message)
+        updating = false
+        return
+      }
+
+      try {
+        if (this.hasNewVersionAvailable('app') || !this.appRunning) {
+          await this.tryStartProgram('app')
+        }
+      } catch(err) {
+        this.log.error(err, 'Unknown error occured attempting to app')
+        this.log.event.error('Unknown error starting app: ' + err.message)
+      }
+      try {
+        if (this.hasNewVersionAvailable('manage') || !this.manageRunning) {
+          await this.tryStartProgram('manage')
+        }
+      } catch(err) {
+        this.log.error(err, 'Unknown error occured attempting to start manage')
+        this.log.event.error('Unknown error starting manage: ' + err.message)
+      }
+      updating = false
+    }, 1000 * 60 * 60 * 3) // every 3 hours
+  }
+
+  restart() {
+    this._close()
+  }
+
+  status() {
+    return {
+      app: this.appRunning,
+      manage: this.manageRunning,
+      appUpdating: this._appUpdating.updating,
+      manageUpdating: this._manageUpdating.updating,
+      appStarting: this._appUpdating.starting,
+      manageStarting: this._manageUpdating.starting,
+    }
+  }
+
+  async getLatestVersion(active, name) {
+    // Example: 'https://api.github.com/repos/thething/sc-helloworld/releases'
+    this.logActive(name, active, `Updater: Fetching release info from: https://api.github.com/repos/${this.config[name + 'Repository']}/releases\n`)
+
+    let result = await request(this.config, `https://api.github.com/repos/${this.config[name + 'Repository']}/releases`)
+
+    let items = result.body.filter(function(item) {
+      if (!item.assets.length) return false
+      for (let i = 0; i < item.assets.length; i++) {
+        if (item.assets[i].name.endsWith('-sc.zip')) return true
+      }
+    })
+
+    if (items && items.length) {
+      for (let x = 0; x < items.length; x++) {
+        let item = items[x]
+        for (let i = 0; i < item.assets.length; i++) {
+          if (item.assets[i].name.endsWith('-sc.zip')) {
+            if (this.db.get('core.' + name + 'LatestInstalled').value() === item.name) {
+              this.logActive(name, active, `Updater: Latest version already installed, exiting early\n`)
+              return null
+            }
+            this.logActive(name, active, `Updater: Found version ${item.name} with file ${item.assets[i].name}\n`)
+  
+            await this.db.set(`core.${name}LatestVersion`, item.name)
+                    .write()
+            this.emit('dbupdated', {})
+
+            return {
+              name: item.name,
+              filename: item.assets[i].name,
+              url: item.assets[i].browser_download_url,
+              description: item.body,
+            }
+          }
+        }
+      }
+    } else {
+      return null
+    }
+  }
+
+  logActive(name, active, logline, doNotPrint = false) {
+    if (!doNotPrint) {
+      this.log.info(`[${name}] ` + logline.replace(/\n/g, ''))
+    }
+    active.logs += logline
+    this.emit(name + 'log', active)
+  }
+
+  getProgramLogs(name) {
+    if (name === 'app' && this._appUpdating.logs) {
+      return this._appUpdating.logs
+    } else if (name === 'manage' && this._manageUpdating.logs) {
+      return this._manageUpdating.logs
+    }
+
+    let latestInstalled = this.db.get('core.' + name + 'LatestInstalled').value()
+    let latestVersion = this.db.get('core.' + name + 'LatestVersion').value()
+    if (latestVersion) {
+      let value = this.db.get(`core_${name}History`).getById(latestVersion).value()
+      if (value) return value.logs
+    }
+    if (latestInstalled) {
+      let value = this.db.get(`core_${name}History`).getById(latestInstalled).value()
+      if (value) return value.logs
+    }
+    return '< no logs found >'
+  }
+
+  async installVersion(name, active, version) {
+    if (fs.existsSync(this.util.getPathFromRoot(`./${name}/` + version.name))) {
+      await this.util.runCommand('rmdir', ['/S', '/Q', `"${this.util.getPathFromRoot(`./${name}/` + version.name)}"`])
+    }
+    if (!fs.existsSync(this.util.getPathFromRoot(`./${name}/`))) {
+      await fsp.mkdir(this.util.getPathFromRoot(`./${name}/`))
+    }
+    try {
+      await fsp.mkdir(this.util.getPathFromRoot(`./${name}/` + version.name))
+    } catch(err) {
+      if (err.code !== 'EEXIST') {
+        throw err
+      }
+    }
+    // await fsp.mkdir(this.util.getPathFromRoot(`./${name}/` + version.name + '/node_modules'))
+    this.logActive(name, active, `Installer: Downloading ${version.name} (${version.url}) to ${version.name + '/' + version.name + '.zip'}\n`)
+    let filePath = this.util.getPathFromRoot(`./${name}/` + version.name + '/' + version.name + '.zip')
+    await request(this.config, version.url, filePath)
+    this.logActive(name, active, `Installer: Downloading finished, starting extraction\n`)
+    await this.util.runCommand(
+      '"C:\\Program Files\\7-Zip\\7z.exe"',
+      ['x', `"${filePath}"`],
+      this.util.getPathFromRoot(`./${name}/` + version.name + '/'),
+      this.logActive.bind(this, name, active)
+    )
+
+    if (!fs.existsSync(this.util.getPathFromRoot(`./${name}/` + version.name + '/index.mjs'))) {
+      this.logActive(name, active, `\nInstaller: ERROR: Missing index.mjs in the folder, exiting\n`)
+      throw new Error(`Missing index.mjs in ${this.util.getPathFromRoot(`./${name}/` + version.name + '/index.mjs')}`)
+    }
+
+    this.logActive(name, active, `\nInstaller: Starting npm install\n`)
+    
+    await this.util.runCommand(
+      'npm.cmd',
+      ['install', '--production', '--no-optional', '--no-package-lock', '--no-audit'],
+      this.util.getPathFromRoot(`./${name}/` + version.name + '/'),
+      this.logActive.bind(this, name, active)
+    )
+    
+    await this.db.set(`core.${name}LatestInstalled`, version.name)
+                  .write()
+    this.emit('dbupdated', {})
+    
+    this.logActive(name, active, `\nInstaller: Successfully installed ${version.name}\n`)
+  }
+
+  getActive(name) {
+    if (name === 'app') {
+      return this._appUpdating
+    } else if (name === 'manage') {
+      return this._manageUpdating
+    } else {
+      throw new Error('Invalid name: ' + name)
+    }
+  }
+
+  async startModule(module, port) {
+    let out = await module.start(this.config, this.db, this.log, this, this.http, port)
+    if (out && out.then) {
+      await out
+    }
+    if (!this.http.getCurrentServer()) {
+      this.log.warn('Module did not call http.createServer')
+    }
+  }
+
+  hasNewVersionAvailable(name) {
+    let newestVersion = this.db.get(`core.${name}LatestInstalled`).value()
+    if (!newestVersion) return false
+
+    let history = this.db.get(`core_${name}History`).getById(newestVersion).value()
+    if (history.installed && history.stable === 0) {
+      return true
+    }
+    return false
+  }
+  
+  async tryStartProgram(name) {
+    let active = this.getActive(name)
+
+    if (this[name + 'Running'] && !this.hasNewVersionAvailable(name)) {
+      this.log.event.warn('Attempting to start ' + name + ' which is already running')
+      this.log.warn('Attempting to start ' + name + ' which is already running')
+      this.logActive(name, active, `Runner: Attempting to start it but it is already running\n`, true)
+      return
+    }
+    active.starting = true
+
+    if (this[name + 'Running']) {
+      let success = await this.http.closeServer(name)
+      if (!success) {
+        if (process.env.NODE_ENV === 'production') {
+          this.logActive(name, active, `Runner: Found new version but server could not be shut down, restarting service core\n`)
+          await new Promise(() => {
+            this.log.event.warn('Found new version of ' + name + ' but server could not be shut down gracefully, restarting...', null, () => {
+              process.exit(100)
+            })
+          })
+        } else {
+          this.logActive(name, active, `Runner: Found new version but server could not be shut down\n`)
+          return
+        }
+      }
+      this[name + 'Running'] = false
+      this.emit('statusupdated', {})
+    }
+
+    let history = this.db.get(`core_${name}History`)
+        .filter('installed')
+        .orderBy('installed', 'desc')
+        .value()
+    this.logActive(name, active, `Runner: Finding available version\n`)
+
+    for (let i = 0; i < history.length; i++) {
+      if ((history[i].stable === -1 && !active.fresh)
+          || (history[i].stable < -1)) {
+        this.logActive(name, active, `Runner: Skipping version ${history[i].name} due to marked as unstable\n`)
+        continue
+      }
+
+      await this.db.set(`core.${name}Active`, history[i].name)
+                    .write()
+      this.emit('dbupdated', {})
+
+      let running = await this.tryStartProgramVersion(name, active, history[i].name)
+      if (running) {
+        history[i].stable = 1
+      } else {
+        if (active.fresh || history[i].stable === -1) {
+          history[i].stable = -2
+        } else {
+          history[i].stable = -1
+        }
+        await this.db.set(`core.${name}Active`, null)
+                    .write()
+        this.emit('dbupdated', {})
+      }
+      active.fresh = false
+
+      await this.db.get(`core_${name}History`).updateById(history[i].id, history[i].stable).write()
+      if (history[i].stable > 0) break
+    }
+
+    if (!this.db.get(`core.${name}Active`).value()) {
+      this.logActive(name, active, `Runner: Could not find any available stable version of ${name}\n`)
+      this.log.error('Unable to start ' + name)
+      this.log.event.error('Unable to start ' + name)
+    }
+
+    active.starting = false
+  }
+
+  programCrashed(name, version, active, oldStable) {
+    let newStable = -2
+    console.log('EXITING:', oldStable, active)
+    if (oldStable === 0 && !active.fresh) {
+      newStable = -1
+    }
+    let temp = this.db.get(`core_${name}History`).getById(version).set('stable', newStable )
+    temp.value() // Trigger update on __wrapped__
+    fs.writeFileSync(this.db.adapterFilePath, JSON.stringify(temp.__wrapped__, null, 2))
+  }
+
+  async tryStartProgramVersion(name, active, version) {
+    if (!version) return false
+    this.logActive(name, active, `Runner: Attempting to start ${version}\n`)
+    let indexPath = this.util.getUrlFromRoot(`./${name}/` + version + '/index.mjs')
+    let module
+
+    try {
+      this.logActive(name, active, `Runner: Loading ${indexPath}\n`)
+      module = await import(indexPath)
+    } catch (err) {
+      this.logActive(name, active, `Runner: Error importing module\n`, true)
+      this.logActive(name, active, `${err.stack}\n`, true)
+      this.log.error(err, `Failed to load ${indexPath}`)
+      return false
+    }
+
+    let checkTimeout = null
+    let oldStable = this.db.get(`core_${name}History`).getById(version).value().stable
+    this._activeCrashHandler = this.programCrashed.bind(this, name, version, active, oldStable)
+    process.once('exit', this._activeCrashHandler)
+    try {
+      let port = name === 'app' ? this.config.port : this.config.managePort
+      await new Promise((res, rej) => {
+        checkTimeout = setTimeout(function() {
+          rej(new Error('Program took longer than 60 seconds to resolve promise'))
+        }, 60 * 1000)
+
+        this.logActive(name, active, `Runner: Starting module\n`)
+
+        try {
+          this.http.setContext(name)
+          this.startModule(module, port)
+              .then(res, rej)
+        } catch (err) {
+          rej(err)
+        }
+      })
+      clearTimeout(checkTimeout)
+
+      await this.checkProgramRunning(name, active, port)
+      process.off('exit', this._activeCrashHandler)
+    } catch (err) {
+      clearTimeout(checkTimeout)
+      process.off('exit', this._activeCrashHandler)
+      await this.http.closeServer(name)
+
+      this.logActive(name, active, `Runner: Error starting\n`, true)
+      this.logActive(name, active, `${err.stack}\n`, true)
+      this.log.error(err, `Failed to start ${name}`)
+      return false
+    }
+    this._activeCrashHandler = null
+    
+    this.logActive(name, active, `Runner: Successfully started version ${version}\n`)
+    await this.db.set(`core.${name}Active`, version)
+                  .write()
+
+    if (name === 'app') {
+      this.appRunning = true
+    } else {
+      this.manageRunning = true
+    }
+    this.emit('statusupdated', {})
+
+    this.logActive(name, active, `Runner: Module is running successfully\n`)
+    
+    return true
+  }
+
+  async checkProgramRunning(name, active, port) {
+    this.logActive(name, active, `Checker: Testing out module port ${port}\n`)
+    let start = new Date()
+    let error = null
+    let success = false
+
+    while (new Date() - start < 10 * 1000) {
+      try {
+        let check = await request(this.config, `http://localhost:${port}`, null, 0, true)
+        success = true
+        break
+      } catch(err) {
+        this.logActive(name, active, `Checker: ${err.message}, retrying in 3 seconds\n`)
+        error = err
+        await new Promise(function(res) { setTimeout(res, 3000)})
+      }
+    }
+    if (success) return true
+    throw error || new Error('Checking server failed')
+  }
+
+  async installLatestVersion(name) {
+    if (!this.config[name + 'Repository']) {
+      if (name === 'app') {
+        this.log.error(name + ' Repository was missing from config')
+        this.log.event.error(name + ' Repository was missing from config')
+      } else {
+        this.log.warn(name + ' Repository was missing from config')
+        this.log.event.warn(name + ' Repository was missing from config')
+      }
+      return
+    }
+
+    let active = this.getActive(name)
+    let oldLogs = active.logs || ''
+    if (oldLogs) {
+      oldLogs += '\n'
+    }
+    active.logs = ''
+    active.updating = true
+
+    this.emit('statusupdated', {})
+    this.logActive(name, active, `Installer: Checking for updates at time: ${new Date().toISOString().replace('T', ' ').split('.')[0]}\n`)
+
+    let version = null
+    let installed = false
+    let found = false
+    try {
+      version = await this.getLatestVersion(active, name)
+      if (version) {
+        let core = this.db.get('core').value()
+        let fromDb = this.db.get(`core_${name}History`).getById(version.name).value()
+        if (!fromDb || !fromDb.installed) {
+          let oldVersion = core[name + 'Current'] || '<none>'
+          this.logActive(name, active, `Installer: Updating from ${oldVersion} to ${version.name}\n`)
+          await this.installVersion(name, active, version)
+          this.logActive(name, active, `Installer: Finished: ${new Date().toISOString().replace('T', ' ').split('.')[0]}\n`)
+          installed = new Date()
+        } else {
+          found = true
+          this.logActive(name, active, `Installer: Version ${version.name} already installed\n`)
+        }
+      }
+    } catch(err) {
+      this.logActive(name, active, '\n', true)
+      this.logActive(name, active, `Installer: Exception occured while updating ${name}\n`, true)
+      this.logActive(name, active, err.stack, true)
+      this.log.error('Error while updating ' + name, err)
+    }
+    active.updating = false
+    if (version && !found) {
+      await this.db.get(`core_${name}History`).upsert({
+        id: version.name,
+        name: version.name,
+        filename: version.filename,
+        url: version.url,
+        description: version.description,
+        logs: active.logs,
+        stable: 0,
+        installed: installed && installed.toISOString(),
+      }).write()
+    }
+    active.logs = oldLogs + active.logs
+    this.emit(name + 'log', active)
+    this.emit('statusupdated', {})
+  }
+
+  async start(name) {
+    var version = this.db.get('core.' + name + 'LatestInstalled').value()
+    if (version) {
+      await this.tryStartProgram(name)
+    }
+
+    await this.installLatestVersion(name)
+
+    if (version !== this.db.get('core.' + name + 'LatestInstalled').value()) {
+      if (!this[name + 'Running'] || this.hasNewVersionAvailable(name)) {
+        await this.tryStartProgram(name)
+      }
+    }
+  }
+}

core/db.mjs

@@ -1,6 +1,5 @@
 import { setTimeout } from 'timers/promises'
 import { Low, JSONFile, Memory } from 'lowdb'
-import { type } from 'os'
 import { defaults, isObject } from './defaults.mjs'
 
 export default function GetDB(config, log, orgFilename = 'db.json') {
@@ -87,9 +86,9 @@ export default function GetDB(config, log, orgFilename = 'db.json') {
   db.addApplication = function(name) {
     db.data.core[name] ||= {}
     defaults(db.data.core[name], {
-      active: null,
-      latestInstalled: null,
-      latestVersion: null,
+      active: '',
+      latestInstalled: '',
+      latestVersion: '',
       updater: '',
       versions: [],
     })

core/http.mjs

@@ -24,6 +24,17 @@ export default class HttpServer {
       })
     })
 
+    server.listenAsync = (port, host) => {
+      return new Promise((res, rej) => {
+        server.once('error', rej)
+
+        server.listen(port, host || '0.0.0.0', () => {
+          server.off('error', rej)
+          res()
+        })
+      })
+    }
+
     this.active = server
     return server
   }
@@ -38,11 +49,13 @@ export default class HttpServer {
       this.sockets.clear()
 
       this.active.close(err => {
-        if (err) return rej(err)
+        if (err) {
+          if (err.code !== 'ERR_SERVER_NOT_RUNNING') return rej(err)
+        }
         this.active = null
 
         // Waiting 1 second for it to close down
-        setTimeout(function() {res() }, 1000)
+        setTimeout(function() {res() }, 100)
       })
     })
   }

core/log.mjs

@@ -1,15 +1,24 @@
-import nodewindows from 'node-windows'
+// import nodewindows from 'node-windows'
 import bunyan from 'bunyan-lite'
+import { setTimeout } from 'timers/promises'
 
-export default function getLog(name) {
+export default function getLog(name, streams = null, opts = {}) {
   let settings
   let ringbuffer = new bunyan.RingBuffer({ limit: 100 })
   let ringbufferwarn = new bunyan.RingBuffer({ limit: 100 })
 
+  if (streams) {
+    streams.forEach(function(stream) {
+      if (stream.stream === 'process.stdout') {
+        stream.stream = process.stdout
+      }
+    })
+  }
+
   if (process.env.NODE_ENV === 'production') {
     settings = {
-      "name": "service-core",
-      "streams": [{
+      "name": name,
+      "streams": streams || [{
           path: 'log.log',
           level: 'info',
         }
@@ -17,8 +26,8 @@ export default function getLog(name) {
     }
   } else {
     settings = {
-      "name": "service-core",
-      "streams": [{
+      "name": name,
+      "streams": streams || [{
           "stream": process.stdout,
           "level": "debug"
         }
@@ -53,16 +62,64 @@ export default function getLog(name) {
     level: 'info',
   })
 
+  let eventManager = null
+  let eventManagerLoading = false
+
+  async function safeLoadEvent(level, message, code) {
+    if (eventManager === false) {
+      return Promise.resolve()
+    }
+
+    if (!eventManager) {
+      if (eventManagerLoading) {
+        for (let i = 0; i < 10 && eventManagerLoading; i++) {
+          await setTimeout(50)
+        }
+        if (eventManagerLoading) {
+          eventManager = false
+        }
+        return safeLoadEvent(level, message, code)
+      }
+
+      eventManagerLoading = true
+
+      let prom
+      if (opts.import) {
+        prom = opts.import('node-windows')
+      } else {
+        prom = import('node-windows')
+      }
+      await prom.then(
+        function(res) { eventManager = new res.default.EventLogger(name) },
+        function() { eventManager = false },
+      )
+      eventManagerLoading = false
+      return safeLoadEvent(level, message, code)
+    }
+
+    return new Promise(function(res) {
+      try {
+        eventManager[level](message, code, function() { res() })
+      } catch {
+        res()
+      }
+    })
+  }
+
   // Create our logger.
   logger = bunyan.createLogger(settings)
 
   if (process.env.NODE_ENV === 'production') {
-    logger.event = new nodewindows.EventLogger(name)
+    logger.event = {
+      info: safeLoadEvent.bind(this, 'info'),
+      warn: safeLoadEvent.bind(this, 'warn'),
+      error: safeLoadEvent.bind(this, 'error'),
+    }
   } else {
     logger.event = {
-      info: function() {},
-      warn: function() {},
-      error: function() {},
+      info: function() { return Promise.resolve() },
+      warn: function() { return Promise.resolve() },
+      error: function() { return Promise.resolve() },
     }
   }
   logger.ringbuffer = ringbuffer

core/util.mjs

@@ -26,15 +26,58 @@ export default class Util {
   }
 
   getAppNames(config) {
+    const validLevels = [
+      'fatal',
+      'error',
+      'warn',
+      'info',
+      'debug',
+      'trace',
+    ]
     let out = []
     let keys = Object.keys(config)
     for (let key of keys) {
-      if (typeof(config[key]) !== 'object' || config[key] == null) continue
-      if (typeof(config[key].port) !== 'number' || !config[key].port) continue
-      if (typeof(config[key].provider) !== 'string' || !config[key].provider) continue
-      if (config[key].https != null && typeof(config[key].https) !== 'boolean') continue
-      if (config[key].updateEvery != null && (typeof(config[key].updateEvery) !== 'number' || config[key].updateEvery < 1)) continue
-      if (config[key].waitUntilFail != null && (typeof(config[key].waitUntilFail) !== 'number' || config[key].waitUntilFail < 10)) continue
+      if (typeof(config[key]) !== 'object' || config[key] == null)
+        continue
+      if (typeof(config[key].port) !== 'number' || !config[key].port)
+        continue
+      if (typeof(config[key].provider) !== 'string' || !config[key].provider)
+        continue
+      if (config[key].https != null && typeof(config[key].https) !== 'boolean')
+        continue
+      if (config[key].updateEvery != null && (typeof(config[key].updateEvery) !== 'number' || config[key].updateEvery < 0))
+        continue
+      if (config[key].startWaitUntilFail != null && (typeof(config[key].startWaitUntilFail) !== 'number' || config[key].startWaitUntilFail < 10))
+        continue
+      if (config[key].heartbeatTimeout != null && (typeof(config[key].heartbeatTimeout) !== 'number' || config[key].heartbeatTimeout < 10))
+        continue
+      if (config[key].heartbeatAttempts != null && (typeof(config[key].heartbeatAttempts) !== 'number' || config[key].heartbeatAttempts < 1))
+        continue
+      if (config[key].heartbeatAttemptsWait != null && (typeof(config[key].heartbeatAttemptsWait) !== 'number' || config[key].heartbeatAttemptsWait < 10))
+        continue
+      if (config[key].heartbeatPath != null && (typeof(config[key].heartbeatPath) !== 'string' || config[key].heartbeatPath[0] !== '/'))
+        continue
+      if (config[key].log != null) {
+        if (!Array.isArray(config[key].log))
+          continue
+        let valid = true
+        for (let stream of config[key].log) {
+          if (!stream || typeof(stream) !== 'object' || Array.isArray(stream)) {
+            valid = false
+            break
+          }
+          if (typeof(stream.level) !== 'string' || !stream.level || !validLevels.includes(stream.level)) {
+            valid = false
+            break
+          }
+          if ((typeof(stream.path) !== 'string' || !stream.path) && stream.stream !== 'process.stdout') {
+            valid = false
+            break
+          }
+        }
+        if (!valid)
+          continue
+      }
 
       out.push(key)
     }

package.json

@@ -6,6 +6,7 @@
   "scripts": {
     "dev": "nodemon --watch dev/api --watch core --watch runner.mjs --watch db.mjs --watch log.mjs runner.mjs | bunyan",
     "test": "eltro \"test/**/*.test.mjs\" -r dot",
+    "test:spec": "eltro \"test/**/*.test.mjs\" -r list",
     "test:watch": "npm-watch test"
   },
   "watch": {
@@ -13,7 +14,10 @@
       "patterns": [
         "{core,test}/*"
       ],
-      "ignore": "test/testapp",
+      "ignore": [
+        "test/testapp",
+        "test/testnoexisting"
+      ],
       "extensions": "js,mjs",
       "quiet": true,
       "inherit": true

test/application.integration.test.mjs

@@ -1,27 +1,24 @@
 import { Eltro as t, assert, stub } from 'eltro'
 import fs from 'fs/promises'
-import lowdb from '../core/db.mjs'
 import Application from '../core/application.mjs'
 import GitProvider from '../core/providers/git.mjs'
 import Util from '../core/util.mjs'
+import { createFakeContext } from './helpers.mjs'
 
 const util = new Util(import.meta.url)
-const logger = {
-  info: stub(),
-  warn: stub(),
-  error: stub(),
-}
+
 
 t.skip().timeout(10000).describe('Application update integration test', function() {
-  let db
+  let ctx
   let app
   let provider
 
   t.before(function() {
-    return lowdb({ test: { } }, logger, util.getPathFromRoot('./db_test.json')).then(function(res) {
-      db = res
+    return createFakeContext({ }, util, util.getPathFromRoot('./db_test.json'))
+      .then(function(res) {
+        ctx = res
         provider = new GitProvider({ url: 'https://git.nfp.is/api/v1/repos/thething/sc-helloworld/releases' })
-      app = new Application(util, db, provider, 'testapp')
+        app = new Application(ctx, provider, 'testapp')
   
         return provider.getLatestVersion()
       }).then(function(version) {
@@ -30,25 +27,28 @@ t.skip().timeout(10000).describe('Application update integration test', function
   })
 
   t.after(function() {
-    if (db.data.core.testapp.versions.length) {
-      return fs.rm(`./test/testapp/${db.data.core.testapp.versions[0].id}`, { force: true, recursive: true })
+    return fs.rm(util.getPathFromRoot('./db_test.json'))
+      .then(function() {
+        if (ctx.db.data.core.testapp.versions.length) {
+          return fs.rm(`./test/testapp/${ctx.db.data.core.testapp.versions[0].id}`, { force: true, recursive: true })
         }
       })
+  })
 
   t.test('should run update and install correctly', async function(){
     try {
       await app.update()
     } catch (err) {
       console.log(err)
-      if (db.data.core.testapp.versions.length) {
-        console.log(db.data.core.testapp.versions[0].log)
+      if (ctx.db.data.core.testapp.versions.length) {
+        console.log(ctx.db.data.core.testapp.versions[0].log)
       }
       throw err
     }
 
-    assert.ok(db.data.core.testapp.latestInstalled)
-    await fs.stat(util.getPathFromRoot(`./testapp/${db.data.core.testapp.latestInstalled}/index.mjs`))
-    await fs.stat(util.getPathFromRoot(`./testapp/${db.data.core.testapp.latestInstalled}/package.json`))
-    await fs.stat(util.getPathFromRoot(`./testapp/${db.data.core.testapp.latestInstalled}/node_modules`))
+    assert.ok(ctx.db.data.core.testapp.latestInstalled)
+    await fs.stat(util.getPathFromRoot(`./testapp/${ctx.db.data.core.testapp.latestInstalled}/index.mjs`))
+    await fs.stat(util.getPathFromRoot(`./testapp/${ctx.db.data.core.testapp.latestInstalled}/package.json`))
+    await fs.stat(util.getPathFromRoot(`./testapp/${ctx.db.data.core.testapp.latestInstalled}/node_modules`))
   })
 })

test/application.run.test.mjs

@@ -1,58 +1,59 @@
 import { Eltro as t, assert, stub } from 'eltro'
 import fs from 'fs/promises'
-import lowdb from '../core/db.mjs'
 import Application from '../core/application.mjs'
 import Util from '../core/util.mjs'
+import lowdb from '../core/db.mjs'
 import StaticProvider from '../core/providers/static.mjs'
+import { createFakeContext } from './helpers.mjs'
 
 const util = new Util(import.meta.url)
 
-const logger = {
-  info: stub(),
-  warn: stub(),
-  error: stub(),
-}
-function createProvider() {
-  return {
-    getLatestVersion: stub(),
-    downloadVersion: stub(),
-  }
-}
-
-t.timeout(250).describe('#runVersion()', function() {
+t.describe('#runVersion("static")', function() {
   const assertPort = 22345
-  let db
+  let ctx
   let app
 
-  const defaultHandler = function(db, log, http, port) {
-    const server = http.createServer(function (req, res) {
+  const defaultHandler = function(orgHandler) {
+    let handler = orgHandler || function (req, res) {
       res.writeHead(204); res.end(JSON.stringify({ a: 1 }))
-    })
+    }
+    return function(http, port, ctx) {
+      const server = http.createServer(handler)
 
-    return new Promise(function(res, rej) {
-      server.listen(port, '0.0.0.0', function(err) {
-        if (err) return rej(err)
-        res()
-      })
-    })
+      return server.listenAsync(port)
+    }
   }
 
-  t.beforeEach(function() {
-    return lowdb({ test: { } }, logger, null).then(function(res) {
-      db = res
-      let provider = new StaticProvider()
-      app = new Application(util, db, provider, 'testapp')
-      app.config.port = assertPort
-      app.registerModule(defaultHandler)
+  t.before(function() {
+    return fs.mkdir(util.getPathFromRoot('./testnoexisting'), { recursive: true })
   })
+
+  t.after(function() {
+    return fs.rm(util.getPathFromRoot('./testnoexisting'), { force: true, recursive: true })
+  })
+  
+  t.beforeEach(function() {
+    return createFakeContext()
+      .then(function(res) {
+        ctx = res
+        let provider = new StaticProvider()
+        app = new Application(ctx, provider, 'testapp')
+        app.config.port = assertPort
+        app.registerModule(defaultHandler())
+      })
+  })
+
+  t.afterEach(function() {
+    return app.http.closeServer()
   })
 
   t.test('should throw if http is not called', async function() {
-    app.registerModule(function(checkDb, checkLog, checkHttp, checkPort) {
-      assert.strictEqual(checkDb, db)
-      assert.strictEqual(checkLog, db.log)
+    app.registerModule(function(checkHttp, checkPort, checkCtx) {
       assert.strictEqual(checkHttp, app.http)
       assert.strictEqual(checkPort, assertPort)
+      assert.strictEqual(checkCtx.db, ctx.db)
+      assert.strictEqual(checkCtx.log, ctx.log)
+      assert.strictEqual(checkCtx.app, app)
     })
 
     let err = await assert.isRejected(app.runVersion('static'))
@@ -62,10 +63,11 @@ t.timeout(250).describe('#runVersion()', function() {
     assert.match(err.message, /static/)
     assert.match(err.message, new RegExp(app.name))
     assert.match(err.message, /call/i)
+    assert.strictEqual(ctx.db.data.core.testapp.active, 'static')
   })
 
   t.test('should throw if it timeouts waiting for promise to succeed', async function() {
-    app.config.waitUntilFail = 50
+    app.config.startWaitUntilFail = 50
     app.registerModule(function() { return new Promise(function() {}) })
     
     let err = await assert.isRejected(app.runVersion('static'))
@@ -75,18 +77,203 @@ t.timeout(250).describe('#runVersion()', function() {
     assert.match(err.message, /static/)
     assert.match(err.message, /50ms/)
     assert.match(err.message, new RegExp(app.name))
+    assert.strictEqual(ctx.db.data.core.testapp.active, 'static')
   })
 
   t.test('should otherwise succeed if it finished within the time limit', async function() {
-    app.config.waitUntilFail = 250
-    app.registerModule(function(db, log, http, port) {
+    const handler = defaultHandler()
+    app.config.startWaitUntilFail = 250
+    app.registerModule(function(http, port, ctx) {
       return new Promise(function(res) {
         setTimeout(res, 25)
       }).then(function() {
-        return defaultHandler(db, log, http, port)
+        return handler(http, port, ctx)
       })
     })
     
     await app.runVersion('static')
+
+    assert.strictEqual(ctx.db.data.core.testapp.active, 'static')
+  })
+
+  t.test('should fail if run succeeds but heartbeat errors', async function() {
+    let called = 0
+    const handler = function(req, res) {
+      called++
+      res.statusCode = 400
+      res.end(JSON.stringify({ a: 1 }))
+    }
+    app.config.heartbeatAttempts = 3
+    app.registerModule(defaultHandler(handler))
+
+    let err = await assert.isRejected(app.runVersion('static'))
+    assert.match(err.message, /app/i)
+    assert.match(err.message, /failed/i)
+    assert.match(err.message, /static/i)
+    assert.match(err.message, /testapp/i)
+    assert.match(err.message, /400/i)
+    assert.strictEqual(called, 3)
+    assert.strictEqual(ctx.db.data.core.testapp.active, 'static')
+  })
+
+  t.test('should fail if run succeeds but heartbeat times out', async function() {
+    let called = 0
+    const handler = function(req, res) {
+      called++
+    }
+    app.config.heartbeatAttempts = 2
+    app.config.heartbeatAttemptsWait = 30
+    app.registerModule(defaultHandler(handler))
+
+    let start = performance.now()
+    let err = await assert.isRejected(app.runVersion('static'))
+    let end = performance.now()
+    assert.match(err.message, /app/i)
+    assert.match(err.message, /failed/i)
+    assert.match(err.message, /static/i)
+    assert.match(err.message, /testapp/i)
+    assert.match(err.message, /time/i)
+    assert.match(err.message, /out/i)
+    assert.match(err.message, /30ms/i)
+    assert.ok(end - start > app.config.heartbeatAttempts * app.config.heartbeatAttemptsWait)
+    assert.strictEqual(called, 2)
+    assert.strictEqual(ctx.db.data.core.testapp.active, 'static')
+  })
+
+  t.test('should call with correct path', async function() {
+    const assertPath = '/test/something'
+    const handler = function(req, res) {
+      if (req.url === assertPath) {
+        res.writeHead(204); res.end(JSON.stringify({ a: 1 }))
+      } else {
+        res.statusCode = 400
+        res.end(JSON.stringify({ a: 1 }))
+      }
+    }
+    app.config.heartbeatAttempts = 3
+    app.registerModule(defaultHandler(handler))
+
+    let err = await assert.isRejected(app.runVersion('static'))
+    assert.match(err.message, /app/i)
+    assert.match(err.message, /failed/i)
+    assert.match(err.message, /static/i)
+    assert.match(err.message, /testapp/i)
+    assert.match(err.message, /400/i)
+
+    await app.http.closeServer()
+    app.registerModule(defaultHandler(handler))
+
+    app.config.heartbeatPath = assertPath
+    await app.runVersion('static')
+
+    assert.strictEqual(ctx.db.data.core.testapp.active, 'static')
+  })
+})
+
+t.skip().describe('#runVersion("version")', function() {
+  const assertConfig = util.getPathFromRoot('./db_test_applicationrun.json')
+  const assertPort = 22345
+  let ctx
+  let app
+
+  t.before(function() {
+    return fs.rm(util.getPathFromRoot('./testnoexisting'), { force: true, recursive: true })
+      .then(function() {
+        return fs.mkdir(util.getPathFromRoot('./testnoexisting'), { recursive: true })
+      })
+  })
+
+  t.after(function() {
+    return fs.rm(util.getPathFromRoot('./testnoexisting'), { force: true, recursive: true })
+  })
+
+  t.beforeEach(function() {
+    return createFakeContext({ }, util, assertConfig)
+      .then(function(res) {
+        ctx = res
+        let provider = new StaticProvider()
+        app = new Application(ctx, provider, 'testnoexisting')
+        app.config.port = assertPort
+        return app.ctx.db.write()
+      })
+  })
+
+  t.afterEach(function() {
+    return Promise.all([
+      fs.rm(assertConfig),
+      app.http.closeServer(),
+    ])
+  })
+
+  t.test('when version is specified, should check if index.mjs exists', async function() {
+    const assertNotError = new Error('AI DO')
+    const assertTarget = util.getPathFromRoot('./testnoexisting/v100/index.mjs')
+    let stubFsStat = stub()
+    let provider = new StaticProvider()
+    app = new Application(ctx, provider, 'testnoexisting', {
+      fs: { stat: stubFsStat }
+    })
+    app.config.port = assertPort
+    stubFsStat.rejects(assertNotError)
+
+    let err = await assert.isRejected(app.runVersion('v100'))
+    assert.notStrictEqual(err, assertNotError)
+    assert.match(err.message, new RegExp(assertNotError.message))
+    assert.match(err.message, /index\.mjs/i)
+    assert.match(err.message, /testnoexisting/i)
+    assert.match(err.message, /v100/i)
+    assert.match(err.message, /missing/i)
+    assert.strictEqual(stubFsStat.firstCall[0], assertTarget)
+
+    assert.strictEqual(app.ctx.db.data.core.testnoexisting.active, 'v100')
+    let checkDb = await lowdb({}, ctx.log, assertConfig)
+    assert.strictEqual(checkDb.data.core.testnoexisting.active, 'v100')
+  })
+
+  t.test('when version is specified and file exists, should attempt to load module', async function() {
+    const assertError = new Error('Parallel Days')
+    await fs.mkdir(util.getPathFromRoot('./testnoexisting/v99'), { recursive: true })
+    await fs.writeFile(util.getPathFromRoot('./testnoexisting/v99/index.mjs'), `throw new Error('${assertError.message}')`)
+
+    let err = await assert.isRejected(app.runVersion('v99'))
+    assert.notStrictEqual(err, assertError)
+    assert.match(err.message, new RegExp(assertError.message))
+    assert.match(err.message, /testnoexisting/i)
+    assert.match(err.message, /v99/i)
+    assert.match(err.message, /index\.mjs/i)
+    
+    assert.strictEqual(app.ctx.db.data.core.testnoexisting.active, 'v99')
+    let checkDb = await lowdb({}, ctx.log, assertConfig)
+    assert.strictEqual(checkDb.data.core.testnoexisting.active, 'v99')
+  })
+
+  t.test('when version is specified and file exists, should check if it has start', async function() {
+    await fs.mkdir(util.getPathFromRoot('./testnoexisting/v98'), { recursive: true })
+    await fs.writeFile(util.getPathFromRoot('./testnoexisting/v98/index.mjs'), ``)
+
+    let err = await assert.isRejected(app.runVersion('v98'))
+    assert.match(err.message, /testnoexisting/i)
+    assert.match(err.message, /v98/i)
+    assert.match(err.message, /start/i)
+
+    assert.strictEqual(app.ctx.db.data.core.testnoexisting.active, 'v98')
+    let checkDb = await lowdb({}, ctx.log, assertConfig)
+    assert.strictEqual(checkDb.data.core.testnoexisting.active, 'v98')
+  })
+
+  t.test('when version is specified and file exists and everything is okay, should work normally', async function() {
+    await fs.mkdir(util.getPathFromRoot('./testnoexisting/v97'), { recursive: true })
+    await fs.copyFile(
+      util.getPathFromRoot('./exampleindex.mjs'),
+      util.getPathFromRoot('./testnoexisting/v97/index.mjs')
+    )
+
+    app.ctx.log.info.reset()
+    app.ctx.log.event.info.reset()
+
+    await app.runVersion('v97')
+
+    assert.ok(app.ctx.log.info.called)
+    assert.ok(app.ctx.log.event.info.called)
   })
 })

test/application.test.mjs

@@ -1,10 +1,10 @@
 import { setTimeout, setImmediate } from 'timers/promises'
 import { Eltro as t, assert, stub } from 'eltro'
 import fs from 'fs/promises'
-import lowdb from '../core/db.mjs'
 import Application from '../core/application.mjs'
 import Util from '../core/util.mjs'
 import StaticProvider from '../core/providers/static.mjs'
+import { createFakeContext } from './helpers.mjs'
 
 const util = new Util(import.meta.url)
 
@@ -21,41 +21,46 @@ function createProvider() {
 }
 
 t.describe('constructor()', function() {
-  let db
+  let ctx
 
   t.beforeEach(function() {
-    return lowdb({ test: { } }, logger, null).then(function(res) {
-      db = res
-    })
+    return createFakeContext()
+      .then(function(res) { ctx = res })
   })
 
   t.test('should auto-create application', function() {
-    assert.notOk(db.data.core.test)
+    assert.notOk(ctx.db.data.core.test)
 
-    new Application(util, db, {}, 'test')
+    new Application(ctx, {}, 'test')
 
-    assert.ok(db.data.core.test)
-    assert.ok(db.data.core.test.versions)
-    assert.strictEqual(db.data.core.test.active, null)
-    assert.strictEqual(db.data.core.test.latestInstalled, null)
-    assert.strictEqual(db.data.core.test.latestVersion, null)
+    assert.ok(ctx.db.data.core.test)
+    assert.ok(ctx.db.data.core.test.versions)
+    assert.strictEqual(ctx.db.data.core.test.active, '')
+    assert.strictEqual(ctx.db.data.core.test.latestInstalled, '')
+    assert.strictEqual(ctx.db.data.core.test.latestVersion, '')
   })
 
   t.test('should keep config and other of itself', function() {
     const assertTest = { a: 1 }
     const assertName = 'test'
-    db.config = {
+    ctx.db.config = {
       test: assertTest,
       app: { b: 2},
       manage: { c: 3 },
     }
 
-    let app = new Application(util, db, {}, assertName)
-    assert.strictEqual(app.config, assertTest)
+    let app = new Application(ctx, {}, assertName)
+    assert.notStrictEqual(app.config, assertTest)
+    assert.strictEqual(app.config.a, assertTest.a)
     assert.strictEqual(app.config.updateEvery, 180)
-    assert.strictEqual(app.config.waitUntilFail, 60 * 1000)
-    assert.strictEqual(app.db, db)
-    assert.strictEqual(app.util, util)
+    assert.strictEqual(app.config.startWaitUntilFail, 60 * 1000)
+    assert.strictEqual(app.config.heartbeatTimeout, 3 * 1000)
+    assert.strictEqual(app.config.heartbeatAttempts, 5)
+    assert.strictEqual(app.config.heartbeatAttemptsWait, 2 * 1000)
+    assert.strictEqual(app.config.heartbeatPath, '/')
+    assert.strictEqual(app.ctx.db, ctx.db)
+    assert.strictEqual(app.ctx.app, app)
+    assert.strictEqual(app.ctx.util, ctx.util)
     assert.strictEqual(app.name, assertName)
     assert.strictEqual(app.fresh, true)
     assert.strictEqual(app.running, false)
@@ -66,38 +71,37 @@ t.describe('constructor()', function() {
   })
 
   t.test('should create http instance correctly', function() {
-    db.config = {
+    ctx.db.config = {
       testapp: { a: 1, https: true },
       app: { b: 2},
       manage: { c: 3 },
     }
 
-    let app = new Application(util, db, {}, 'testapp')
+    let app = new Application(ctx, {}, 'testapp')
     assert.ok(app.http)
     assert.ok(app.http.ishttps)
   })
 
   t.test('should keep provider', function() {
     const assertProvider = { a: 1 }
-    let app = new Application(util, db, assertProvider, 'test')
+    let app = new Application(ctx, assertProvider, 'test')
     assert.strictEqual(app.provider, assertProvider)
   })
 })
 
 t.timeout(250).describe('#startAutoupdater()', function() {
-  let db
+  let ctx
 
   t.beforeEach(function() {
-    return lowdb({ test: { }, testapp: { } }, logger, null).then(function(res) {
-      db = res
-    })
+    return createFakeContext()
+      .then(function(res) { ctx = res })
   })
   
   t.test('should do nothing if provider is static', async function() {
     const stubInterval = stub()
     stubInterval.throws(new Error('should not be seen'))
     let provider = new StaticProvider()
-    let app = new Application(util, db, provider, 'teststatic', { setInterval: stubInterval })
+    let app = new Application(ctx, provider, 'teststatic', { setInterval: stubInterval })
 
     app.startAutoupdater()
   })
@@ -108,9 +112,11 @@ t.timeout(250).describe('#startAutoupdater()', function() {
     const stubUnref = stub()
     stubInterval.returns({ unref: stubUnref })
 
-    db.config.test.updateEvery = assertTimeMinutes
+    ctx.db.config.test = {
+      updateEvery: assertTimeMinutes,
+    }
 
-    let app = new Application(util, db, {}, 'test', { setInterval: stubInterval })
+    let app = new Application(ctx, {}, 'test', { setInterval: stubInterval })
 
     assert.strictEqual(stubInterval.called, false)
     assert.strictEqual(stubUnref.called, false)
@@ -127,7 +133,7 @@ t.timeout(250).describe('#startAutoupdater()', function() {
     const stubInterval = stub()
     stubInterval.returns({ unref: function() {} })
 
-    let app = new Application(util, db, {}, 'test', { setInterval: stubInterval })
+    let app = new Application(ctx, {}, 'test', { setInterval: stubInterval })
 
     assert.strictEqual(stubInterval.called, false)
 
@@ -147,7 +153,7 @@ t.timeout(250).describe('#startAutoupdater()', function() {
       return Promise.resolve()
     })
 
-    let app = new Application(util, db, {}, 'test', { setInterval: stubInterval })
+    let app = new Application(ctx, {}, 'test', { setInterval: stubInterval })
     app.update = stubUpdate
     app.startAutoupdater()
 
@@ -156,12 +162,12 @@ t.timeout(250).describe('#startAutoupdater()', function() {
 
     stubInterval.firstCall[0]()
 
-    while (db.data.core.test.updater === '') {
+    while (ctx.db.data.core.test.updater === '') {
       await setTimeout(10)
     }
 
-    assert.match(db.data.core.test.updater, /auto/i)
-    assert.match(db.data.core.test.updater, /update/i)
+    assert.match(ctx.db.data.core.test.updater, /auto/i)
+    assert.match(ctx.db.data.core.test.updater, /update/i)
   })
 
   t.test('should add any errors to last in db update check on errors when updating', async function() {
@@ -169,28 +175,55 @@ t.timeout(250).describe('#startAutoupdater()', function() {
     const assertErrorMessage = 'Ai Do'
     stubInterval.returns({ unref: function() {} })
 
-    let app = new Application(util, db, {}, 'test', { setInterval: stubInterval })
+    let app = new Application(ctx, {}, 'test', { setInterval: stubInterval })
     app.update = function() {
       return Promise.reject(new Error(assertErrorMessage))
     }
     app.startAutoupdater()
 
-    assert.strictEqual(db.data.core.test.updater, '')
+    assert.strictEqual(ctx.db.data.core.test.updater, '')
 
     stubInterval.firstCall[0]()
 
-    while (db.data.core.test.updater === '') {
+    while (ctx.db.data.core.test.updater === '') {
       await setTimeout(10)
     }
 
-    assert.match(db.data.core.test.updater, /auto/i)
-    assert.match(db.data.core.test.updater, /update/i)
-    assert.match(db.data.core.test.updater, new RegExp(assertErrorMessage))
+    assert.match(ctx.db.data.core.test.updater, /auto/i)
+    assert.match(ctx.db.data.core.test.updater, /update/i)
+    assert.match(ctx.db.data.core.test.updater, new RegExp(assertErrorMessage))
+  })
+})
+
+t.timeout(250).describe('#closeServer()', function() {
+  let app
+  let stubCloseServer
+
+  t.beforeEach(function() {
+    return createFakeContext()
+      .then(function(res) {
+        let provider = createProvider()
+        app = new Application(res, provider, 'testapp')
+        app.http.closeServer = stubCloseServer = stub().resolves()
+      })
+  })
+
+  t.test('should call closeServer correctly', async function() {
+    const assertError = new Error('Moonlight Fiesta')
+    stubCloseServer.rejects(assertError)
+
+    let err = await assert.isRejected(app.closeServer())
+
+    assert.strictEqual(err, assertError)
+  })
+
+  t.test('otherwise should work fine', async function() {
+    await app.closeServer()
   })
 })
 
 t.timeout(250).describe('#update()', function() {
-  let db
+  let ctx
   let app
   let provider
   let stubExtract
@@ -201,18 +234,15 @@ t.timeout(250).describe('#update()', function() {
   let stubFsStat
 
   t.beforeEach(function() {
-    util.extractFile = stubExtract = stub()
-    util.runCommand = stubRunCommand = stub()
+    return createFakeContext()
+      .then(function(res) {
+        ctx = res
+        ctx.util.extractFile = stubExtract = stub().resolves()
+        ctx.util.runCommand = stubRunCommand = stub().resolves()
+        ctx.db.write = stubWrite = stub().resolves()
 
-    stubExtract.resolves()
-    stubRunCommand.resolves()
-
-    return lowdb({ test: { } }, logger, null).then(function(res) {
-      db = res
-      db.write = stubWrite = stub()
-      stubWrite.resolves()
         provider = createProvider()
-      app = new Application(util, db, provider, 'testapp', {
+        app = new Application(ctx, provider, 'testapp', {
           fs: {
             mkdir: stubFsMkdir = stub(),
             rm: stubFsRm = stub(),
@@ -233,33 +263,35 @@ t.timeout(250).describe('#update()', function() {
 
   t.test('should do nothing if provider is static', async function() {
     provider = new StaticProvider()
-    app = new Application(util, db, provider, 'teststatic')
+    app = new Application(ctx, provider, 'teststatic')
+
+    stubWrite.reset()
 
     await app.update()
 
-    assert.match(db.data.core.teststatic.updater, /static/i)
-    assert.match(db.data.core.teststatic.updater, /nothing/i)
-    let old = db.data.core.teststatic.updater
+    assert.match(ctx.db.data.core.teststatic.updater, /static/i)
+    assert.match(ctx.db.data.core.teststatic.updater, /nothing/i)
+    let old = ctx.db.data.core.teststatic.updater
     assert.ok(stubWrite.called)
     assert.strictEqual(stubWrite.callCount, 1)
     
     await app.update()
-    assert.strictEqual(db.data.core.teststatic.updater, old)
+    assert.strictEqual(ctx.db.data.core.teststatic.updater, old)
     assert.strictEqual(stubWrite.callCount, 1)
 
-    db.data.core.teststatic.updater = 'asdf'
+    ctx.db.data.core.teststatic.updater = 'asdf'
     
     await app.update()
-    assert.strictEqual(db.data.core.teststatic.updater, old)
+    assert.strictEqual(ctx.db.data.core.teststatic.updater, old)
     assert.strictEqual(stubWrite.callCount, 2)
     
     await app.update()
-    assert.strictEqual(db.data.core.teststatic.updater, old)
+    assert.strictEqual(ctx.db.data.core.teststatic.updater, old)
     assert.strictEqual(stubWrite.callCount, 2)
   })
 
   t.test('multiple calls should be safe', async function() {
-    db.data.core.testapp.updater = ''
+    ctx.db.data.core.testapp.updater = ''
 
     provider.getLatestVersion.returnWith(function() {
       return new Promise(function() {})
@@ -282,7 +314,7 @@ t.timeout(250).describe('#update()', function() {
   t.test('should check for latest version', async function() {
     const assertError = new Error('Ore wa Subete wo Shihaisuru')
     provider.getLatestVersion.rejects(assertError)
-    db.data.core.testapp.updater = ''
+    ctx.db.data.core.testapp.updater = ''
 
     let err = await assert.isRejected(app.update())
     
@@ -291,10 +323,10 @@ t.timeout(250).describe('#update()', function() {
     
     assert.ok(stubWrite.called)
     assert.ok(stubWrite.callCount >= 1)
-    assert.match(db.data.core.testapp.updater, /check/i)
-    assert.match(db.data.core.testapp.updater, /version/i)
-    assert.match(db.data.core.testapp.updater, new RegExp(new Date().toISOString().split('T')[0]))
-    assert.match(db.data.core.testapp.updater, new RegExp(assertError.message))
+    assert.match(ctx.db.data.core.testapp.updater, /check/i)
+    assert.match(ctx.db.data.core.testapp.updater, /version/i)
+    assert.match(ctx.db.data.core.testapp.updater, new RegExp(new Date().toISOString().split('T')[0]))
+    assert.match(ctx.db.data.core.testapp.updater, new RegExp(assertError.message))
   })
 
   t.test('should call provider download latest correctly if new 7zip version', async function() {
@@ -302,27 +334,27 @@ t.timeout(250).describe('#update()', function() {
     const assertLink = 'All of you'
     const assertVersion = { version: '123456789', link: assertLink, filename: 'test.7z' }
     const assertTarget = util.getPathFromRoot('./testapp/123456789/file.7z')
-    assert.strictEqual(db.data.core.testapp.versions.length, 0)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 0)
 
     provider.getLatestVersion.resolves(assertVersion)
     provider.downloadVersion.rejects(assertError)
-    db.data.core.testapp.updater = ''
+    ctx.db.data.core.testapp.updater = ''
 
     let err = await assert.isRejected(app.update())
     
     assert.strictEqual(app.updating, false)
     assert.strictEqual(err, assertError)
-    assert.match(db.data.core.testapp.updater, /found/i)
-    assert.match(db.data.core.testapp.updater, new RegExp(assertVersion.version))
-    assert.match(db.data.core.testapp.updater, /downloading/i)
-    assert.match(db.data.core.testapp.updater, new RegExp(assertLink))
-    assert.match(db.data.core.testapp.updater, new RegExp(assertTarget.replace(/\\/g, '\\\\')))
+    assert.match(ctx.db.data.core.testapp.updater, /found/i)
+    assert.match(ctx.db.data.core.testapp.updater, new RegExp(assertVersion.version))
+    assert.match(ctx.db.data.core.testapp.updater, /downloading/i)
+    assert.match(ctx.db.data.core.testapp.updater, new RegExp(assertLink))
+    assert.match(ctx.db.data.core.testapp.updater, new RegExp(assertTarget.replace(/\\/g, '\\\\')))
     assert.strictEqual(provider.downloadVersion.firstCall[0], assertVersion)
     assert.strictEqual(provider.downloadVersion.firstCall[1], assertTarget)
-    assert.match(db.data.core.testapp.updater, new RegExp(assertError.message))
+    assert.match(ctx.db.data.core.testapp.updater, new RegExp(assertError.message))
     
-    assert.strictEqual(db.data.core.testapp.versions.length, 1)
-    assert.strictEqual(db.data.core.testapp.versions[0], assertVersion)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 1)
+    assert.strictEqual(ctx.db.data.core.testapp.versions[0], assertVersion)
     assert.ok(assertVersion.log)
     assert.match(assertVersion.log, /\. \n/)
     assert.match(assertVersion.log, new RegExp(assertError.message))
@@ -341,8 +373,8 @@ t.timeout(250).describe('#update()', function() {
     
     assert.strictEqual(app.updating, false)
     assert.strictEqual(err, assertError)
-    assert.strictEqual(db.data.core.testapp.versions.length, 1)
-    assert.strictEqual(db.data.core.testapp.versions[0], assertVersion)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 1)
+    assert.strictEqual(ctx.db.data.core.testapp.versions[0], assertVersion)
     assert.strictEqual(assertVersion.failtodownload, 2)
   })
 
@@ -351,27 +383,27 @@ t.timeout(250).describe('#update()', function() {
     const assertLink = 'All of you'
     const assertVersion = { version: '123456789', link: assertLink, filename: 'test.7z' }
     const assertTarget = util.getPathFromRoot('./testapp/123456789/file.7z')
-    assert.strictEqual(db.data.core.testapp.versions.length, 0)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 0)
 
     provider.getLatestVersion.resolves(assertVersion)
     provider.downloadVersion.rejects(assertError)
-    db.data.core.testapp.updater = ''
+    ctx.db.data.core.testapp.updater = ''
 
     let err = await assert.isRejected(app.update())
     
     assert.strictEqual(app.updating, false)
     assert.strictEqual(err, assertError)
-    assert.match(db.data.core.testapp.updater, /found/i)
-    assert.match(db.data.core.testapp.updater, new RegExp(assertVersion.version))
-    assert.match(db.data.core.testapp.updater, /downloading/i)
-    assert.match(db.data.core.testapp.updater, new RegExp(assertLink))
-    assert.match(db.data.core.testapp.updater, new RegExp(assertTarget.replace(/\\/g, '\\\\')))
+    assert.match(ctx.db.data.core.testapp.updater, /found/i)
+    assert.match(ctx.db.data.core.testapp.updater, new RegExp(assertVersion.version))
+    assert.match(ctx.db.data.core.testapp.updater, /downloading/i)
+    assert.match(ctx.db.data.core.testapp.updater, new RegExp(assertLink))
+    assert.match(ctx.db.data.core.testapp.updater, new RegExp(assertTarget.replace(/\\/g, '\\\\')))
     assert.strictEqual(provider.downloadVersion.firstCall[0], assertVersion)
     assert.strictEqual(provider.downloadVersion.firstCall[1], assertTarget)
-    assert.match(db.data.core.testapp.updater, new RegExp(assertError.message))
+    assert.match(ctx.db.data.core.testapp.updater, new RegExp(assertError.message))
     
-    assert.strictEqual(db.data.core.testapp.versions.length, 1)
-    assert.strictEqual(db.data.core.testapp.versions[0], assertVersion)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 1)
+    assert.strictEqual(ctx.db.data.core.testapp.versions[0], assertVersion)
     assert.ok(assertVersion.log)
     assert.match(assertVersion.log, /\. \n/)
     assert.match(assertVersion.log, new RegExp(assertError.message))
@@ -389,8 +421,8 @@ t.timeout(250).describe('#update()', function() {
     
     assert.strictEqual(app.updating, false)
     assert.strictEqual(err, assertError)
-    assert.strictEqual(db.data.core.testapp.versions.length, 1)
-    assert.strictEqual(db.data.core.testapp.versions[0], assertVersion)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 1)
+    assert.strictEqual(ctx.db.data.core.testapp.versions[0], assertVersion)
     assert.strictEqual(assertVersion.failtodownload, 2)
   })
 
@@ -404,7 +436,7 @@ t.timeout(250).describe('#update()', function() {
       stream(assertExtractText)
       return Promise.reject(assertError)
     })
-    assert.strictEqual(db.data.core.testapp.versions.length, 0)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 0)
     
     let err = await assert.isRejected(app.update())
 
@@ -413,8 +445,8 @@ t.timeout(250).describe('#update()', function() {
     assert.strictEqual(app.updating, false)
     assert.strictEqual(stubExtract.firstCall[0], assertTarget)
 
-    assert.match(db.data.core.testapp.updater, new RegExp('extracting[^.]+file\.7z', 'i'))
-    assert.match(db.data.core.testapp.updater, new RegExp(assertError.message))
+    assert.match(ctx.db.data.core.testapp.updater, new RegExp('extracting[^.]+file\.7z', 'i'))
+    assert.match(ctx.db.data.core.testapp.updater, new RegExp(assertError.message))
     
     assert.ok(stubFsRm.called)
     assert.strictEqual(stubFsRm.firstCall[0], assertFolder)
@@ -423,8 +455,8 @@ t.timeout(250).describe('#update()', function() {
     
     assert.ok(stubWrite.called)
     assert.ok(stubWrite.callCount >= 3)
-    assert.strictEqual(db.data.core.testapp.versions.length, 1)
-    let version = db.data.core.testapp.versions[0]
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 1)
+    let version = ctx.db.data.core.testapp.versions[0]
     assert.ok(version.log)
     assert.match(version.log, /\. \n/)
     assert.match(version.log, new RegExp('extracting[^.]+file\.7z', 'i'))
@@ -439,15 +471,15 @@ t.timeout(250).describe('#update()', function() {
     
     assert.strictEqual(app.updating, false)
     assert.strictEqual(err, assertError)
-    assert.strictEqual(db.data.core.testapp.versions.length, 1)
-    assert.strictEqual(db.data.core.testapp.versions[0], version)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 1)
+    assert.strictEqual(ctx.db.data.core.testapp.versions[0], version)
     assert.strictEqual(version.failtodownload, 2)
   })
 
   t.test('should call fs remove the archieve file', async function() {
     const assertError = new Error('Tiny Kizuna')
     const assertTarget = util.getPathFromRoot('./testapp/123456789/file.7z')
-    assert.strictEqual(db.data.core.testapp.versions.length, 0)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 0)
     stubFsRm.rejects(assertError)
 
     await app.update()
@@ -464,7 +496,7 @@ t.timeout(250).describe('#update()', function() {
     const assertTarget = util.getPathFromRoot('./testapp/123456789/index.mjs')
     stubRunCommand.rejects(new Error('should not be seen'))
     stubFsStat.rejects(assertError)
-    assert.strictEqual(db.data.core.testapp.versions.length, 0)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 0)
 
     let err = await assert.isRejected(app.update())
 
@@ -472,11 +504,11 @@ t.timeout(250).describe('#update()', function() {
     assert.ok(stubExtract.called)
     assert.strictEqual(err, assertError)
     assert.strictEqual(stubFsStat.firstCall[0], assertTarget)
-    assert.match(db.data.core.testapp.updater, /index\.mjs/i)
-    assert.match(db.data.core.testapp.updater, /missing/i)
+    assert.match(ctx.db.data.core.testapp.updater, /index\.mjs/i)
+    assert.match(ctx.db.data.core.testapp.updater, /missing/i)
     
-    assert.strictEqual(db.data.core.testapp.versions.length, 1)
-    let version = db.data.core.testapp.versions[0]
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 1)
+    let version = ctx.db.data.core.testapp.versions[0]
     assert.ok(version.log)
     assert.match(version.log, /index\.mjs/i)
     assert.match(version.log, /missing/i)
@@ -489,8 +521,8 @@ t.timeout(250).describe('#update()', function() {
     
     assert.strictEqual(app.updating, false)
     assert.strictEqual(err, assertError)
-    assert.strictEqual(db.data.core.testapp.versions.length, 1)
-    assert.strictEqual(db.data.core.testapp.versions[0], version)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 1)
+    assert.strictEqual(ctx.db.data.core.testapp.versions[0], version)
     assert.strictEqual(version.failtodownload, 2)
   })
   
@@ -504,7 +536,7 @@ t.timeout(250).describe('#update()', function() {
       }
       return Promise.resolve({})
     })
-    assert.strictEqual(db.data.core.testapp.versions.length, 0)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 0)
 
     await app.update()
 
@@ -514,16 +546,16 @@ t.timeout(250).describe('#update()', function() {
     assert.strictEqual(stubFsStat.secondCall[0], assertTarget)
     assert.ok(stubExtract.called)
     assert.notOk(stubRunCommand.called)
-    assert.match(db.data.core.testapp.updater, /package\.json/i)
-    assert.match(db.data.core.testapp.updater, /contain/i)
+    assert.match(ctx.db.data.core.testapp.updater, /package\.json/i)
+    assert.match(ctx.db.data.core.testapp.updater, /contain/i)
     
-    assert.strictEqual(db.data.core.testapp.versions.length, 1)
-    let version = db.data.core.testapp.versions[0]
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 1)
+    let version = ctx.db.data.core.testapp.versions[0]
     assert.ok(version.log)
     assert.match(version.log, /package\.json/i)
     assert.match(version.log, /contain/i)
     assert.ok(version.log.endsWith('\n'))
-    assert.ok(db.data.core.testapp.latestInstalled)
+    assert.ok(ctx.db.data.core.testapp.latestInstalled)
     assert.match(version.log, /finished/i)
     assert.match(version.log, /updating/i)
     
@@ -533,10 +565,10 @@ t.timeout(250).describe('#update()', function() {
 
     await app.update()
 
-    assert.strictEqual(db.data.core.testapp.versions.length, 1)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 1)
     assert.notOk(provider.downloadVersion.called)
-    assert.match(db.data.core.testapp.updater, /already/i)
-    assert.match(db.data.core.testapp.updater, /nothing/i)
+    assert.match(ctx.db.data.core.testapp.updater, /already/i)
+    assert.match(ctx.db.data.core.testapp.updater, /nothing/i)
   })
 
   t.test('should otherwise call npm install correctly', async function() {
@@ -547,7 +579,7 @@ t.timeout(250).describe('#update()', function() {
     const assertTarget = util.getPathFromRoot('./testapp/123456789')
     const assertTargetCheck = util.getPathFromRoot('./testapp/123456789/')
     provider.getLatestVersion.resolves(assertVersion)
-    assert.strictEqual(db.data.core.testapp.versions.length, 0)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 0)
 
     stubExtract.returnWith(function(target, stream) {
       stream(assertExtractText)
@@ -578,10 +610,10 @@ t.timeout(250).describe('#update()', function() {
     
     assert.ok(stubWrite.called)
     assert.ok(stubWrite.callCount >= 4)
-    assert.match(db.data.core.testapp.updater, /npm/i)
-    assert.match(db.data.core.testapp.updater, /install/i)
-    assert.strictEqual(db.data.core.testapp.versions.length, 1)
-    assert.strictEqual(db.data.core.testapp.versions[0], assertVersion)
+    assert.match(ctx.db.data.core.testapp.updater, /npm/i)
+    assert.match(ctx.db.data.core.testapp.updater, /install/i)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 1)
+    assert.strictEqual(ctx.db.data.core.testapp.versions[0], assertVersion)
     assert.ok(assertVersion.log)
     assert.match(assertVersion.log, /\. \n/)
     assert.match(assertVersion.log, new RegExp(assertExtractText))
@@ -598,23 +630,23 @@ t.timeout(250).describe('#update()', function() {
     
     assert.strictEqual(app.updating, false)
     assert.strictEqual(err, assertError)
-    assert.strictEqual(db.data.core.testapp.versions.length, 1)
-    assert.strictEqual(db.data.core.testapp.versions[0], assertVersion)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 1)
+    assert.strictEqual(ctx.db.data.core.testapp.versions[0], assertVersion)
     assert.strictEqual(assertVersion.failtoinstall, 2)
   })
   
   t.test('should update latest installed correctly', async function() {
     const assertVersion = { version: '123456789', link: 'httplinkhere', filename: 'test.7z' }
     provider.getLatestVersion.resolves(assertVersion)
-    assert.notStrictEqual(db.data.core.testapp.latestInstalled, assertVersion.version)
-    assert.strictEqual(db.data.core.testapp.versions.length, 0)
+    assert.notStrictEqual(ctx.db.data.core.testapp.latestInstalled, assertVersion.version)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 0)
 
     await app.update()
 
     assert.strictEqual(app.updating, false)
-    assert.strictEqual(db.data.core.testapp.latestInstalled, assertVersion.version)
-    assert.strictEqual(db.data.core.testapp.versions.length, 1)
-    assert.strictEqual(db.data.core.testapp.versions[0], assertVersion)
+    assert.strictEqual(ctx.db.data.core.testapp.latestInstalled, assertVersion.version)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 1)
+    assert.strictEqual(ctx.db.data.core.testapp.versions[0], assertVersion)
     assert.ok(assertVersion.log)
     assert.ok(stubWrite.callCount >= 4)
     assert.strictEqual(assertVersion.installed, true)
@@ -635,18 +667,18 @@ t.timeout(250).describe('#update()', function() {
     const assertVersion = { version: '123456789', link: 'httplinkhere', filename: 'test.7z', log: oldLog, stable: assertStable }
     
     assertVersion.id = assertVersion.version
-    db.upsert(db.data.core.testapp.versions, assertVersion)
+    ctx.db.upsert(ctx.db.data.core.testapp.versions, assertVersion)
 
     provider.getLatestVersion.resolves({ version: assertVersion.version, link: assertNewLink, filename: assertNewFilename })
-    assert.strictEqual(db.data.core.testapp.versions.length, 1)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 1)
 
     await app.update()
     
     assert.ok(assertVersion.log)
     assert.ok(stubWrite.callCount >= 4)
     assert.strictEqual(app.updating, false)
-    assert.strictEqual(db.data.core.testapp.versions.length, 1)
-    assert.strictEqual(db.data.core.testapp.versions[0], assertVersion)
+    assert.strictEqual(ctx.db.data.core.testapp.versions.length, 1)
+    assert.strictEqual(ctx.db.data.core.testapp.versions[0], assertVersion)
     assert.strictEqual(assertVersion.stable, assertStable)
     assert.ok(assertVersion.log)
     assert.ok(assertVersion.log.startsWith(oldLog))
@@ -664,16 +696,16 @@ t.timeout(250).describe('#update()', function() {
     const assertVersion = { version: '999.888.777.666', filename: 'test.7z' }
     provider.getLatestVersion.resolves(assertVersion)
     provider.downloadVersion.rejects(assertError)
-    db.data.core.testapp.updater = ''
-    db.data.core.testapp.latestInstalled = assertVersion.version
+    ctx.db.data.core.testapp.updater = ''
+    ctx.db.data.core.testapp.latestInstalled = assertVersion.version
 
     await app.update()
     
     assert.ok(stubWrite.callCount >= 1)
     assert.strictEqual(app.updating, false)
     assert.notOk(provider.downloadVersion.called)
-    assert.match(db.data.core.testapp.updater, /already/i)
-    assert.match(db.data.core.testapp.updater, /nothing/i)
+    assert.match(ctx.db.data.core.testapp.updater, /already/i)
+    assert.match(ctx.db.data.core.testapp.updater, /nothing/i)
   })
 
   t.test('should do nothing if installed version is found', async function() {
@@ -681,20 +713,20 @@ t.timeout(250).describe('#update()', function() {
     const assertVersion = { version: '999.888.777.666', filename: 'test.7z' }
     provider.getLatestVersion.resolves(assertVersion)
     provider.downloadVersion.rejects(assertError)
-    db.data.core.testapp.updater = ''
+    ctx.db.data.core.testapp.updater = ''
 
-    db.upsert(db.data.core.testapp.versions, { id: '111.111.111.111', installed: true })
-    db.upsert(db.data.core.testapp.versions, { id: '222.222.222.222', installed: true })
-    db.upsert(db.data.core.testapp.versions, { id: '999.888.777.666', installed: true })
-    db.upsert(db.data.core.testapp.versions, { id: '333.333.333.333', installed: true })
+    ctx.db.upsert(ctx.db.data.core.testapp.versions, { id: '111.111.111.111', installed: true })
+    ctx.db.upsert(ctx.db.data.core.testapp.versions, { id: '222.222.222.222', installed: true })
+    ctx.db.upsert(ctx.db.data.core.testapp.versions, { id: '999.888.777.666', installed: true })
+    ctx.db.upsert(ctx.db.data.core.testapp.versions, { id: '333.333.333.333', installed: true })
 
     await app.update()
     
     assert.ok(stubWrite.callCount >= 1)
     assert.strictEqual(app.updating, false)
     assert.notOk(provider.downloadVersion.called)
-    assert.match(db.data.core.testapp.updater, /already/i)
-    assert.match(db.data.core.testapp.updater, /nothing/i)
+    assert.match(ctx.db.data.core.testapp.updater, /already/i)
+    assert.match(ctx.db.data.core.testapp.updater, /nothing/i)
   })
 
   t.test('should do nothing it exists and failtodownload is higher than 3', async function() {
@@ -702,17 +734,17 @@ t.timeout(250).describe('#update()', function() {
     const assertVersion = { version: '999.888.777.666', filename: 'test.7z' }
     provider.getLatestVersion.resolves(assertVersion)
     provider.downloadVersion.rejects(assertError)
-    db.data.core.testapp.updater = ''
-    db.upsert(db.data.core.testapp.versions, { id: '999.888.777.666', version: '999.888.777.666', link: 'httplinkhere', filename: 'test.7z', failtodownload: 4 })
+    ctx.db.data.core.testapp.updater = ''
+    ctx.db.upsert(ctx.db.data.core.testapp.versions, { id: '999.888.777.666', version: '999.888.777.666', link: 'httplinkhere', filename: 'test.7z', failtodownload: 4 })
 
     await app.update()
     
     assert.ok(stubWrite.callCount >= 1)
     assert.strictEqual(app.updating, false)
     assert.notOk(provider.downloadVersion.called)
-    assert.match(db.data.core.testapp.updater, /many/i)
-    assert.match(db.data.core.testapp.updater, /fail/i)
-    assert.match(db.data.core.testapp.updater, /skip/i)
+    assert.match(ctx.db.data.core.testapp.updater, /many/i)
+    assert.match(ctx.db.data.core.testapp.updater, /fail/i)
+    assert.match(ctx.db.data.core.testapp.updater, /skip/i)
   })
 
   t.test('should do nothing it exists and failtoinstall is higher than 3', async function() {
@@ -720,30 +752,31 @@ t.timeout(250).describe('#update()', function() {
     const assertVersion = { version: '999.888.777.666', filename: 'test.7z' }
     provider.getLatestVersion.resolves(assertVersion)
     provider.downloadVersion.rejects(assertError)
-    db.data.core.testapp.updater = ''
-    db.upsert(db.data.core.testapp.versions, { id: '999.888.777.666', version: '999.888.777.666', link: 'httplinkhere', filename: 'test.7z', failtoinstall: 4 })
+    ctx.db.data.core.testapp.updater = ''
+    ctx.db.upsert(ctx.db.data.core.testapp.versions, { id: '999.888.777.666', version: '999.888.777.666', link: 'httplinkhere', filename: 'test.7z', failtoinstall: 4 })
 
     await app.update()
     
     assert.ok(stubWrite.callCount >= 1)
     assert.strictEqual(app.updating, false)
     assert.notOk(provider.downloadVersion.called)
-    assert.match(db.data.core.testapp.updater, /many/i)
-    assert.match(db.data.core.testapp.updater, /fail/i)
-    assert.match(db.data.core.testapp.updater, /skip/i)
+    assert.match(ctx.db.data.core.testapp.updater, /many/i)
+    assert.match(ctx.db.data.core.testapp.updater, /fail/i)
+    assert.match(ctx.db.data.core.testapp.updater, /skip/i)
   })
 })
 
 t.timeout(250).describe('#registerModule()', function() {
   const assertAppName = 'testappregister'
-  let db
+  let ctx
   let app
   
   t.beforeEach(function() {
-    return lowdb({ test: { } }, logger, null).then(function(res) {
-      db = res
+    return createFakeContext()
+      .then(function(res) {
+        ctx = res
         let provider = new StaticProvider()
-      app = new Application(util, db, provider, assertAppName)
+        app = new Application(ctx, provider, assertAppName)
       })
   })
 

test/core.test.mjs

@@ -0,0 +1,365 @@
+import { Eltro as t, assert, stub } from 'eltro'
+import fs from 'fs/promises'
+import Core from '../core/core.mjs'
+import Util from '../core/util.mjs'
+import { createFakeLog } from './helpers.mjs'
+import StaticProvider from '../core/providers/static.mjs'
+import lowdb from '../core/db.mjs'
+
+const util = new Util(import.meta.url)
+const log = createFakeLog()
+let db
+
+t.before(function() {
+  return lowdb({}, log, null).then(function(res) {
+    db = res
+  })
+})
+
+t.describe('Core.addProvider()', function() {
+  t.beforeEach(function() {
+    Core.providers.clear()
+  })
+
+  t.after(function() {
+    Core.providers.clear()
+  })
+
+  t.test('should fail if name is not a string', function() {
+    let tests = [
+      [1, 'number'],
+      [0, 'false number'],
+      ['', 'false string'],
+      [[], 'array'],
+      [{}, 'object'],
+    ]
+
+    tests.forEach(function(check) {
+      assert.throws(function() {
+        Core.addProvider(check[0], StaticProvider)
+      }, function(err) {
+        assert.match(err.message, /name/i)
+        assert.match(err.message, /string/i)
+        return true
+      }, `throw if name is ${check[1]}`)
+    })
+  })
+  
+  t.test('should fail if provider not a function', function() {
+    let tests = [
+      [1, 'number'],
+      [0, 'false number'],
+      ['asdf', 'string'],
+      ['', 'false string'],
+      [[], 'array'],
+      [{}, 'object'],
+    ]
+
+    tests.forEach(function(check) {
+      assert.throws(function() {
+        Core.addProvider('insertname', check[0])
+      }, function(err) {
+        assert.match(err.message, /provider/i)
+        assert.match(err.message, /class/i)
+        assert.match(err.message, /insertname/i)
+        return true
+      }, `throw if provider is ${check[1]}`)
+    })
+  })
+  
+  t.test('should fail if provider instance is missing checkConfig', function() {
+    let tests = [
+      [1, 'number'],
+      [0, 'false number'],
+      ['asdf', 'string'],
+      ['', 'false string'],
+      [[], 'array'],
+      [{}, 'object'],
+    ]
+
+    tests.forEach(function(check) {
+      assert.throws(function() {
+        let provider = function() { this.getLatestVersion = function() {}; this.checkConfig = check[0] }
+        Core.addProvider('somename', provider)
+      }, function(err) {
+        assert.match(err.message, /provider/i)
+        assert.match(err.message, /class/i)
+        assert.match(err.message, /missing/i)
+        assert.match(err.message, /checkConfig/i)
+        assert.match(err.message, /somename/i)
+        return true
+      }, `throw if provider checkConfig is ${check[1]}`)
+    })
+  })
+  
+  t.test('should fail if provider instance is missing getLatestVersion', function() {
+    let tests = [
+      [1, 'number'],
+      [0, 'false number'],
+      ['asdf', 'string'],
+      ['', 'false string'],
+      [[], 'array'],
+      [{}, 'object'],
+    ]
+
+    tests.forEach(function(check) {
+      assert.throws(function() {
+        let provider = function() { this.checkConfig = function() {}; this.getLatestVersion = check[0] }
+        Core.addProvider('somename', provider)
+      }, function(err) {
+        assert.match(err.message, /provider/i)
+        assert.match(err.message, /class/i)
+        assert.match(err.message, /missing/i)
+        assert.match(err.message, /getLatestVersion/i)
+        assert.match(err.message, /somename/i)
+        return true
+      }, `throw if provider getLatestVersion is ${check[1]}`)
+    })
+  })
+
+  t.test('should otherwise add provider to map', function() {
+    assert.strictEqual(Core.providers.size, 0)
+    Core.addProvider('testnamehere', StaticProvider)
+    assert.strictEqual(Core.providers.size, 1)
+    assert.strictEqual(Core.providers.get('testnamehere'), StaticProvider)
+  })
+})
+
+t.describe('#constructor()', function() {
+  t.test('should throw if close is not a function', function() {
+    let tests = [
+      [1, 'number'],
+      [0, 'false number'],
+      ['asdf', 'string'],
+      ['', 'false string'],
+      [[], 'array'],
+      [{}, 'object'],
+    ]
+
+    tests.forEach(function(check) {
+      assert.throws(function() {
+        new Core(db, util, log, check[0])
+      }, function(err) {
+        assert.match(err.message, /restart/i)
+        assert.match(err.message, /function/i)
+        return true
+      }, `throw if restart is ${check[1]}`)
+    })
+  })
+
+  t.test('should throw if util is not util', function() {
+    let tests = [
+      [1, 'number'],
+      [0, 'false number'],
+      ['asdf', 'string'],
+      ['', 'false string'],
+      [[], 'array'],
+      [{}, 'object'],
+      [Util, 'not instance'],
+    ]
+
+    tests.forEach(function(check) {
+      assert.throws(function() {
+        new Core(db, check[0], log, function() {})
+      }, function(err) {
+        assert.match(err.message, /util/i)
+        assert.match(err.message, /instance/i)
+        return true
+      }, `throw if util is ${check[1]}`)
+    })
+  })
+  
+  t.test('should throw if db is not lowdb', function() {
+    let tests = [
+      [1, 'number'],
+      [0, 'false number'],
+      ['asdf', 'string'],
+      ['', 'false string'],
+      [[], 'array'],
+      [{}, 'object'],
+      [lowdb.Low, 'not instance'],
+    ]
+
+    tests.forEach(function(check) {
+      assert.throws(function() {
+        new Core(check[0], util, log, function() {})
+      }, function(err) {
+        assert.match(err.message, /db/i)
+        assert.match(err.message, /instance/i)
+        return true
+      }, `throw if db is ${check[1]}`)
+    })
+  })
+  
+  t.test('should throw if log is not an object with event', function() {
+    let func = function() {}
+    let validEvent = { info: func, warn: func, error: func }
+    let tests = [
+      [1, 'number'],
+      [0, 'false number'],
+      [null, 'null'],
+      [undefined, 'undefined'],
+      ['asdf', 'string'],
+      ['', 'false string'],
+      [[], 'array'],
+      [{}, 'object'],
+      [{warn: func, event: validEvent }, 'log only warn'],
+      [{error: func, event: validEvent }, 'log only error'],
+      [{info: func, event: validEvent }, 'log only info'],
+      [{warn: func, error: func, event: validEvent }, 'log only warn and error'],
+      [{warn: func, info: func, event: validEvent }, 'log only warn and info'],
+      [{error: func, info: func, event: validEvent }, 'log only error and info'],
+      [{ warn: func, error: func, info: func, event: { warn: func } }, 'event only warn'],
+      [{ warn: func, error: func, info: func, event: { error: func } }, 'event only error'],
+      [{ warn: func, error: func, info: func, event: { info: func } }, 'event only info'],
+      [{ warn: func, error: func, info: func, event: { warn: func, error: func } }, 'event only warn and error'],
+      [{ warn: func, error: func, info: func, event: { warn: func, info: func } }, 'event only warn and info'],
+      [{ warn: func, error: func, info: func, event: { error: func, info: func } }, 'event only error and info'],
+    ]
+
+    tests.forEach(function(check) {
+      assert.throws(function() {
+        new Core(db, util, check[0], func)
+      }, function(err) {
+        assert.match(err.message, /log/i)
+        assert.match(err.message, /valid/i)
+        return true
+      }, `throw if log is ${check[1]}`)
+    })
+  })
+
+  t.test('should accept log, util and close function', function() {
+    const assertLog = log
+    const assertClose = function() {}
+
+    let core = new Core(db, util, assertLog, assertClose)
+    assert.strictEqual(core.db, db)
+    assert.strictEqual(core.util, util)
+    assert.strictEqual(core.log, assertLog)
+    assert.strictEqual(core.restart, assertClose)
+    assert.deepStrictEqual(core.applications, [])
+    assert.ok(core.applicationMap)
+  })
+})
+
+t.describe('#getApplication()', function() {
+
+  t.test('should return application based on the name', function() {
+    const assertName = 'Yami no Naka'
+    const assertApplication = { a: 1 }
+    let core = new Core(db, util, log, function() {})
+    core.applicationMap.set(assertName, assertApplication)
+    assert.strictEqual(core.getApplication(assertName), assertApplication)
+  })
+})
+
+t.describe('#init()', function() {
+  const assertProviderName = 'Kyousuu Gakku Gogyou Kikan'
+  let core
+  let fakeUtil
+  let fakeProvider
+  let fakeProviderConfig
+
+  function FakeProvider(config) {
+    fakeProvider(config)
+    this.static = true
+    this.checkConfig = fakeProviderConfig
+  }
+
+  t.beforeEach(function() {
+    core = new Core(db, util, createFakeLog(), function() {})
+    core.util = fakeUtil = {
+      verifyConfig: stub(),
+      getAppNames: stub().returns([]),
+    }
+    fakeProvider = stub()
+    fakeProviderConfig = stub()
+    Core.providers.set(assertProviderName, FakeProvider)
+  })
+
+  t.test('it should call util.verifyConfig correctly', async function() {
+    const assertError = new Error('Red faction IO drive mix')
+    const assertConfig = { a: 1 }
+    db.config = assertConfig
+    fakeUtil.verifyConfig.throws(assertError)
+
+    let err = await assert.isRejected(core.init())
+    assert.strictEqual(err, assertError)
+    assert.strictEqual(fakeUtil.verifyConfig.firstCall[0], assertConfig)
+  })
+
+  t.test('should call util.getNames correctly', async function() {
+    const assertError = new Error('Hero within')
+    const assertConfig = { a: 1 }
+    db.config = assertConfig
+    fakeUtil.getAppNames.throws(assertError)
+
+    let err = await assert.isRejected(core.init())
+    assert.strictEqual(err, assertError)
+    assert.strictEqual(fakeUtil.getAppNames.firstCall[0], assertConfig)
+  })
+
+  t.test('should call provider constructor correctly', async function() {
+    const assertError = new Error('Funny days')
+    const assertAppName = 'Tsuugakuro'
+    const assertConfig = {
+      [assertAppName]: {
+        provider: assertProviderName,
+      }
+    }
+    db.config = assertConfig
+    fakeProvider.throws(assertError)
+    fakeUtil.getAppNames.returns([assertAppName])
+    
+    let err = await assert.isRejected(core.init())
+    assert.strictEqual(err, assertError)
+    assert.strictEqual(fakeProvider.firstCall[0], assertConfig[assertAppName])
+  })
+
+  t.test('should call provider checkConfig correctly', async function() {
+    const assertAppName = 'Zetsubou'
+    const assertConfig = {
+      [assertAppName]: {
+        provider: assertProviderName,
+      }
+    }
+    db.config = assertConfig
+
+    const assertError = new Error('Shousou')
+    fakeProviderConfig.rejects(assertError)
+    fakeUtil.getAppNames.returns([assertAppName])
+    
+    let err = await assert.isRejected(core.init())
+    assert.strictEqual(err, assertError)
+    assert.strictEqual(fakeProviderConfig.firstCall[0], assertConfig[assertAppName])
+  })
+
+  t.test('should create an application with the provider and name and config', async function() {
+    const assertAppName = 'Yasashii Ketsumatsu'
+    const assertTestString = 'Serozore no Omoi'
+    const assertConfig = {
+      [assertAppName]: {
+        provider: assertProviderName,
+        teststring: assertTestString,
+      }
+    }
+    db.config = assertConfig
+    fakeUtil.getAppNames.returns([assertAppName])
+    assert.strictEqual(core.applications.length, 0)
+
+    await core.init()
+    let application = core.getApplication(assertAppName)
+    
+    assert.ok(application)
+    assert.strictEqual(core.applications.length, 1)
+    assert.strictEqual(core.applications[0], application)
+    assert.strictEqual(application.name, assertAppName)
+    assert.strictEqual(application.ctx.db, core.db)
+    assert.strictEqual(application.ctx.util, core.util)
+    assert.strictEqual(application.ctx.log, core.log)
+    assert.strictEqual(application.ctx.core, core)
+    assert.strictEqual(application.config.teststring, assertTestString)
+    assert.ok(application.fresh)
+    assert.ok(application.provider instanceof FakeProvider)
+  })
+})

test/db.test.mjs

@@ -118,9 +118,9 @@ t.test('Should support adding an application with defaults', async function() {
 
   assert.ok(db.data.core.app)
   assert.ok(db.data.core.app.versions)
-  assert.strictEqual(db.data.core.app.active, null)
-  assert.strictEqual(db.data.core.app.latestInstalled, null)
-  assert.strictEqual(db.data.core.app.latestVersion, null)
+  assert.strictEqual(db.data.core.app.active, '')
+  assert.strictEqual(db.data.core.app.latestInstalled, '')
+  assert.strictEqual(db.data.core.app.latestVersion, '')
   
   assert.notOk(db.data.core.herpderp)
   
@@ -128,9 +128,9 @@ t.test('Should support adding an application with defaults', async function() {
 
   assert.ok(db.data.core.herpderp)
   assert.ok(db.data.core.herpderp.versions)
-  assert.strictEqual(db.data.core.herpderp.active, null)
-  assert.strictEqual(db.data.core.herpderp.latestInstalled, null)
-  assert.strictEqual(db.data.core.herpderp.latestVersion, null)
+  assert.strictEqual(db.data.core.herpderp.active, '')
+  assert.strictEqual(db.data.core.herpderp.latestInstalled, '')
+  assert.strictEqual(db.data.core.herpderp.latestVersion, '')
 })
 
 t.test('Should support reading from db', async function() {

test/exampleindex.mjs

@@ -1,4 +1,4 @@
-export function start(db, log, core, http, port) {
+export function start(http, port, ctx) {
   const server = http.createServer(function (req, res) {
     res.writeHead(200);
     res.end(JSON.stringify({ version: 'exampleindex' }))
@@ -9,8 +9,8 @@ export function start(db, log, core, http, port) {
       if (err) {
         return rej(err)
       }
-      log.event.info(`Server is listening on ${port} serving package ${staticPackage}`)
-      log.info(`Server is listening on ${port} serving package ${staticPackage}`)
+      ctx.log.event.info(`Server is listening on ${port} serving exampleindex`)
+      ctx.log.info(`Server is listening on ${port} serving exampleindex`)
       res()
     })
   })

test/helpers.mjs

@@ -0,0 +1,29 @@
+import { stub } from 'eltro'
+import lowdb from '../core/db.mjs'
+import Util from '../core/util.mjs'
+
+export function createFakeLog() {
+  return {
+    info: stub(),
+    warn: stub(),
+    error: stub(),
+    event: {
+      info: stub(),
+      warn: stub(),
+      error: stub(),
+    }
+  }
+}
+
+export function createFakeContext(config = { }, util = new Util(import.meta.url), filename = null) {
+  const log = createFakeLog()
+
+  return lowdb(config, log, filename).then(function(res) {
+    return {
+      db: res,
+      util: util,
+      log: log,
+      core: { },
+    }
+  })
+}

test/http.test.mjs

@@ -1,6 +1,7 @@
 import { Eltro as t, assert, stub } from 'eltro'
 import http from 'http'
 import https from 'https'
+import { setTimeout } from 'timers/promises'
 import { request } from '../core/client.mjs'
 import HttpServer from '../core/http.mjs'
 
@@ -22,9 +23,7 @@ t.describe('Sockets', function() {
   let http = new HttpServer()
 
   t.after(function() {
-    http.closeServer().then(function() { }, function(err) {
-      console.error(err)
-    })
+    return http.closeServer()
   })
 
   t.test('should keep track of sockets through its lifetime', function(cb) {
@@ -41,7 +40,7 @@ t.describe('Sockets', function() {
     Promise.resolve()
     .then(async function() {
       await new Promise(function(res, rej) {
-        server.listen(port, function(err) { if (err) rej(err); res()})
+        server.listen(port, function() { res()})
       })
 
       assert.strictEqual(actives.length, 0)
@@ -50,16 +49,18 @@ t.describe('Sockets', function() {
       request({}, prefix).then(function() {}, cb)
       request({}, prefix).then(async function() {
         while (http.sockets.size > 0) {
-          await new Promise(function(res) { setTimeout(res, 10) })
+          await setTimeout(10)
         }
         assert.strictEqual(http.sockets.size, 0)
         cb()
       }, cb)
 
       while (actives.length < 2) {
-        await new Promise(function(res) { setTimeout(res, 10) })
+        await setTimeout(10)
       }
       assert.strictEqual(http.sockets.size, 2)
+
+      assert.ok(http.active)
       actives[0].statusCode = 200
       actives[0].end('{}')
       actives[1].statusCode = 200
@@ -68,13 +69,17 @@ t.describe('Sockets', function() {
   })
 })
 
-t.describe('Close', function() {
+t.describe('closeServer()', function() {
   let http = new HttpServer()
 
   t.after(function() {
-    http.closeServer().then(function() { }, function(err) {
-      console.error(err)
+    return http.closeServer()
   })
+
+  t.test('should not fail if server is not listening', function() {
+    http.createServer(function() { })
+
+    return http.closeServer()
   })
 
   t.test('should support forcefully closing them on server close', function(cb) {
@@ -90,7 +95,7 @@ t.describe('Close', function() {
     Promise.resolve()
     .then(async function() {
       await new Promise(function(res, rej) {
-        server.listen(port, function(err) { if (err) rej(err); res()})
+        server.listen(port, function() { res()})
       })
 
       assert.strictEqual(http.sockets.size, 0)
@@ -105,13 +110,15 @@ t.describe('Close', function() {
       )
 
       while (http.sockets.size < 2) {
-        await new Promise(function(res) { setTimeout(res, 10) })
+        await setTimeout(10)
       }
       
+      assert.ok(http.active)
+
       http.closeServer().then(function() { }, cb)
       
       while (requestErrors.length < 2) {
-        await new Promise(function(res) { setTimeout(res, 10) })
+        await setTimeout(10)
       }
       assert.strictEqual(http.sockets.size, 0)
       assert.strictEqual(requestErrors.length, 2)
@@ -122,12 +129,39 @@ t.describe('Close', function() {
       assert.strictEqual(requestErrors[1].code, 'ECONNRESET')
       
       while (requestErrors.length < 2) {
-        await new Promise(function(res) { setTimeout(res, 10) })
+        await setTimeout(10)
       }
       while (http.active) {
-        await new Promise(function(res) { setTimeout(res, 10) })
+        await setTimeout(10)
       }
     })
     .then(function() { cb()}, cb)
   })
 })
+
+t.describe('listenAsync()', function() {
+  let httpFirst = new HttpServer()
+  let httpSecond = new HttpServer()
+
+  t.after(function() {
+    return Promise.all([
+      httpFirst.closeServer(),
+      httpSecond.closeServer(),
+    ])
+  })
+
+  t.test('should reject successfully if port is busy', async function() {
+    let serverFirst = httpFirst.createServer(function() { })
+    let serverSecond = httpSecond.createServer(function() { })
+
+    await serverFirst.listenAsync(port)
+    
+    await setTimeout(10)
+
+    let err = await assert.isRejected(serverSecond.listenAsync(port))
+    assert.strictEqual(err.code, 'EADDRINUSE')
+
+    assert.ok(serverFirst.listening)
+    assert.notOk(serverSecond.listening)
+  })
+})

test/log.test.mjs

@@ -0,0 +1,286 @@
+import { Eltro as t, assert, stub } from 'eltro'
+import getLog from '../core/log.mjs'
+
+t.describe('#constructor', function() {
+  t.afterEach(function() {
+    process.env.NODE_ENV = null
+  })
+
+  t.test('should add name', function() {
+    const assertName = 'Stray Cat'
+    let logger = getLog(assertName)
+    assert.strictEqual(logger.fields.name, assertName)
+
+    process.env.NODE_ENV = 'production'
+    logger = getLog(assertName)
+    assert.strictEqual(logger.fields.name, assertName)
+  })
+
+  t.test('should add default stdout streams in normal environment', function() {
+    let logger = getLog('app', null)
+    assert.strictEqual(logger.streams.length, 4)
+    assert.strictEqual(logger.streams[0].stream, process.stdout)
+    assert.strictEqual(logger.streams[0].level, 20)
+  })
+
+  t.test('should add default file log stream in production environment', function() {
+    process.env.NODE_ENV = 'production'
+
+    let logger = getLog('app', null)
+    assert.strictEqual(logger.streams.length, 4)
+    assert.strictEqual(logger.streams[0].path, 'log.log')
+    assert.strictEqual(logger.streams[0].level, 30)
+  })
+
+  t.test('should not add default stream if empty array', function() {
+    let logger = getLog('app', [])
+    assert.strictEqual(logger.streams.length, 3)
+
+    process.env.NODE_ENV = 'production'
+    logger = getLog('app', [])
+    assert.strictEqual(logger.streams.length, 3)
+  })
+
+  t.test('should replace process.stdout with actual process', function() {
+    let logger = getLog('app', [{ stream: 'process.stdout', level: 'info' }])
+    assert.strictEqual(logger.streams.length, 4)
+    assert.strictEqual(logger.streams[0].stream, process.stdout)
+
+    process.env.NODE_ENV = 'production'
+    logger = getLog('app', [{ stream: 'process.stdout', level: 'info' }])
+    assert.strictEqual(logger.streams.length, 4)
+    assert.strictEqual(logger.streams[0].stream, process.stdout)
+  })
+})
+
+t.describe('ringbuffer', function() {
+  let logger
+
+  t.beforeEach(function() {
+    logger = getLog('app', [])
+  })
+  
+  t.test('should have ringbuffer for info', function() {
+    const assertMessage = 'Oitachi'
+
+    assert.strictEqual(logger.ringbuffer.records.length, 0)
+    logger.info(assertMessage)
+    assert.strictEqual(logger.ringbuffer.records.length, 1)
+    assert.strictEqual(logger.ringbuffer.records[0].level, 30)
+    assert.strictEqual(logger.ringbuffer.records[0].msg, assertMessage)
+    logger.debug(assertMessage)
+    assert.strictEqual(logger.ringbuffer.records.length, 1)
+    logger.warn(assertMessage)
+    assert.strictEqual(logger.ringbuffer.records.length, 2)
+    assert.strictEqual(logger.ringbuffer.records[1].level, 40)
+    assert.strictEqual(logger.ringbuffer.records[1].msg, assertMessage)
+  })
+
+  t.test('should keep it limited to max 100 records', function() {
+    const assertPrefix = 'In memory of Keiten'
+
+    for (let i = 1; i <= 101; i++) {
+      logger.info(assertPrefix + i)
+    }
+    assert.strictEqual(logger.ringbuffer.records.length, 100)
+    assert.strictEqual(logger.ringbuffer.records[0].msg, assertPrefix + '2')
+    
+    logger.info(assertPrefix)
+    
+    assert.strictEqual(logger.ringbuffer.records.length, 100)
+    assert.strictEqual(logger.ringbuffer.records[0].msg, assertPrefix + '3')
+  })
+})
+
+t.describe('ringbufferwarn', function() {
+  let logger
+
+  t.beforeEach(function() {
+    logger = getLog('app', [])
+  })
+  
+  t.test('should have ringbufferwarn for info', function() {
+    const assertMessage = 'Oitachi'
+
+    assert.strictEqual(logger.ringbufferwarn.records.length, 0)
+    logger.warn(assertMessage)
+    assert.strictEqual(logger.ringbufferwarn.records.length, 1)
+    assert.strictEqual(logger.ringbufferwarn.records[0].level, 40)
+    assert.strictEqual(logger.ringbufferwarn.records[0].msg, assertMessage)
+    logger.info(assertMessage)
+    assert.strictEqual(logger.ringbufferwarn.records.length, 1)
+    logger.error(assertMessage)
+    assert.strictEqual(logger.ringbufferwarn.records.length, 2)
+    assert.strictEqual(logger.ringbufferwarn.records[1].level, 50)
+    assert.strictEqual(logger.ringbufferwarn.records[1].msg, assertMessage)
+  })
+
+  t.test('should keep it limited to max 100 records', function() {
+    const assertPrefix = 'In memory of Keiten'
+
+    for (let i = 1; i <= 101; i++) {
+      logger.warn(assertPrefix + i)
+    }
+    assert.strictEqual(logger.ringbufferwarn.records.length, 100)
+    assert.strictEqual(logger.ringbufferwarn.records[0].msg, assertPrefix + '2')
+    
+    logger.warn(assertPrefix)
+    
+    assert.strictEqual(logger.ringbufferwarn.records.length, 100)
+    assert.strictEqual(logger.ringbufferwarn.records[0].msg, assertPrefix + '3')
+  })
+})
+
+t.describe('event', function() {
+  t.test('should call import if not in production', async function() {
+    let stubImport = stub()
+    stubImport.rejects(new Error('should not be seen'))
+
+    let logger = getLog('app', [], { import: stubImport })
+
+    let first = new Promise(function(res, rej) {
+      setImmediate(function() { logger.event.warn('text message here').then(res, rej) })
+    })
+    let second = new Promise(function(res, rej) {
+      setImmediate(function() { logger.event.warn('new message here').then(res, rej) })
+    })
+
+    await Promise.all([
+      first, second,
+    ])
+
+    assert.notOk(stubImport.called)
+  })
+
+  t.test('should call import correctly if in production and fail only once', async function() {
+    process.env.NODE_ENV = 'production'
+
+    let stubImport = stub()
+    stubImport.rejects(new Error('should not be seen'))
+
+    let logger = getLog('app', [], { import: stubImport })
+
+    let first = new Promise(function(res, rej) {
+      setImmediate(function() { try { logger.event.warn('first').then(res, rej) } catch (err) { rej(err) } })
+    })
+    let second = new Promise(function(res, rej) {
+      setImmediate(function() { try { logger.event.warn('second').then(res, rej) } catch (err) { rej(err) } })
+    })
+
+    await Promise.all([
+      first, second,
+    ])
+
+    assert.ok(stubImport.called)
+    assert.strictEqual(stubImport.callCount, 1)
+    assert.strictEqual(stubImport.firstCall[0], 'node-windows')
+
+    await new Promise(function(res, rej) {
+      setImmediate(function() { try { logger.event.warn('third').then(res, rej) } catch (err) { rej(err) } })
+    })
+  })
+
+  t.test('should call event on imported object correctly', async function() {
+    const assertName = 'It is going to be The Special'
+    let checkName = ''
+    let stubInfo = stub().returnWith(function(msg, code, cb) { setTimeout(cb, 20) })
+    let stubWarn = stub().returnWith(function(msg, code, cb) { setTimeout(cb, 20) })
+    let stubError = stub().returnWith(function(msg, code, cb) { setTimeout(cb, 20) })
+    process.env.NODE_ENV = 'production'
+
+    let stubImport = stub().resolves({
+      default: {
+        EventLogger: function(name) {
+          checkName = name
+          this.info = stubInfo
+          this.warn = stubWarn
+          this.error = stubError
+        },
+      },
+    })
+
+    let logger = getLog(assertName, [], { import: stubImport })
+
+    let first = new Promise(function(res, rej) {
+      setImmediate(function() { try { logger.event.info('first', 1010).then(res, rej) } catch (err) { rej(err) } })
+    })
+    let second = new Promise(function(res, rej) {
+      setImmediate(function() { try { logger.event.warn('second', 1020).then(res, rej) } catch (err) { rej(err) } })
+    })
+
+    await Promise.all([
+      first, second,
+    ])
+
+    assert.strictEqual(checkName, assertName)
+    assert.ok(stubInfo.called)
+    assert.strictEqual(stubInfo.firstCall[0], 'first')
+    assert.strictEqual(stubInfo.firstCall[1], 1010)
+    assert.ok(stubWarn.called)
+    assert.strictEqual(stubWarn.firstCall[0], 'second')
+    assert.strictEqual(stubWarn.firstCall[1], 1020)
+    assert.notOk(stubError.called)
+
+    await new Promise(function(res, rej) {
+      setImmediate(function() { try { logger.event.error('third', 1030).then(res, rej) } catch (err) { rej(err) } })
+    })
+
+    assert.ok(stubError.called)
+    assert.strictEqual(stubError.firstCall[0], 'third')
+    assert.strictEqual(stubError.firstCall[1], 1030)
+  })
+
+  t.test('should work even if it were to throw', async function() {
+    const assertName = 'It is going to be The Special'
+    let checkName = ''
+    let stubInfo = stub().returnWith(function() { throw new Error('not to be seen') })
+    let stubWarn = stub().returnWith(function() { throw new Error('not to be seen') })
+    let stubError = stub().returnWith(function() { throw new Error('not to be seen') })
+    process.env.NODE_ENV = 'production'
+
+    let stubImport = stub().resolves({
+      default: {
+        EventLogger: function(name) {
+          checkName = name
+          this.info = stubInfo
+          this.warn = stubWarn
+          this.error = stubError
+        },
+      },
+    })
+
+    let logger = getLog(assertName, [], { import: stubImport })
+
+    let first = new Promise(function(res, rej) {
+      setImmediate(function() { try { logger.event.info().then(res, rej) } catch (err) { rej(err) } })
+    })
+    let second = new Promise(function(res, rej) {
+      setImmediate(function() { try { logger.event.warn().then(res, rej) } catch (err) { rej(err) } })
+    })
+
+    await Promise.all([
+      first, second,
+    ])
+
+    assert.strictEqual(checkName, assertName)
+    assert.ok(stubInfo.called)
+    assert.ok(stubWarn.called)
+    assert.notOk(stubError.called)
+
+    await new Promise(function(res, rej) {
+      setImmediate(function() { try { logger.event.error().then(res, rej) } catch (err) { rej(err) } })
+    })
+
+    assert.ok(stubError.called)
+  })
+
+  t.test('should work without stub', async function() {
+    let res = await import('node-windows').catch(function() {})
+    if (!res) { return }
+
+    process.env.NODE_ENV = 'production'
+    let logger = getLog('service-core-unit-test', [])
+
+    await logger.event.info('Hello from service-core log.event unit test')
+  })
+})

test/util.test.mjs

@@ -1,6 +1,7 @@
 import { Eltro as t, assert} from 'eltro'
 import fs from 'fs/promises'
 import Util from '../core/util.mjs'
+import { defaults } from '../core/defaults.mjs'
 
 const isWindows = process.platform === 'win32'
 
@@ -108,43 +109,162 @@ t.describe('#getApplications()', function() {
     assert.deepStrictEqual(util.getAppNames({ app: { provider: 1234, port: 1234 } }), [])
   })
 
+  function getBase(extra = {}) {
+    return defaults({ app: extra }, { app: { provider: 'asdf', port: 1234, } })
+  }
+
   t.test('should fail to find if https is defined but not a boolean', function() {
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, } }), ['app'])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, https: null } }), ['app'])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, https: false } }), ['app'])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, https: true } }), ['app'])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, https: 'asdf' } }), [])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, https: '1234' } }), [])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, https: 0 } }), [])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, https: [] } }), [])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, https: {} } }), [])
+    assert.deepStrictEqual(util.getAppNames(getBase()), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ https: null })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ https: false })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ https: true })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ https: 'asdf' })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ https: '1234' })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ https: 0 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ https: [] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ https: {} })), [])
   })
 
   t.test('should fail to find if updateEvery is defined but not a valid number', function() {
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, } }), ['app'])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, updateEvery: null } }), ['app'])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, updateEvery: 5 } }), ['app'])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, updateEvery: 1000 } }), ['app'])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, updateEvery: 'asdf' } }), [])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, updateEvery: '1234' } }), [])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, updateEvery: 0 } }), [])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, updateEvery: -5 } }), [])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, updateEvery: [] } }), [])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, updateEvery: {} } }), [])
+    assert.deepStrictEqual(util.getAppNames(getBase()), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ updateEvery: null })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ updateEvery: 5 })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ updateEvery: 1000 })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ updateEvery: 'asdf' })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ updateEvery: '1234' })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ updateEvery: 0 })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ updateEvery: -1 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ updateEvery: -5 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ updateEvery: [] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ updateEvery: {} })), [])
   })
 
-  t.test('should fail to find if waitUntilFail is defined but not a valid number', function() {
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, } }), ['app'])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, waitUntilFail: null } }), ['app'])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, waitUntilFail: 5 } }), [])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, waitUntilFail: 15 } }), ['app'])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, waitUntilFail: 1000 } }), ['app'])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, waitUntilFail: 'asdf' } }), [])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, waitUntilFail: '1234' } }), [])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, waitUntilFail: 0 } }), [])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, waitUntilFail: -5 } }), [])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, waitUntilFail: [] } }), [])
-    assert.deepStrictEqual(util.getAppNames({ app: { provider: 'asdf', port: 1234, waitUntilFail: {} } }), [])
+  t.test('should fail to find if startWaitUntilFail is defined but not a valid number', function() {
+    assert.deepStrictEqual(util.getAppNames(getBase()), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ startWaitUntilFail: null })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ startWaitUntilFail: 5 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ startWaitUntilFail: 15 })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ startWaitUntilFail: 1000 })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ startWaitUntilFail: 'asdf' })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ startWaitUntilFail: '1234' })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ startWaitUntilFail: 0 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ startWaitUntilFail: -5 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ startWaitUntilFail: [] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ startWaitUntilFail: {} })), [])
+  })
+
+  t.test('should fail to find if heartbeatTimeout is defined but not a valid number', function() {
+    assert.deepStrictEqual(util.getAppNames(getBase()), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatTimeout: null })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatTimeout: 5 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatTimeout: 15 })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatTimeout: 1000 })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatTimeout: 'asdf' })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatTimeout: '1234' })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatTimeout: 0 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatTimeout: -5 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatTimeout: [] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatTimeout: {} })), [])
+  })
+
+  t.test('should fail to find if heartbeatAttempts is defined but not a valid number', function() {
+    assert.deepStrictEqual(util.getAppNames(getBase()), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttempts: null })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttempts: 1 })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttempts: 15 })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttempts: 1000 })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttempts: 'asdf' })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttempts: '1234' })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttempts: 0 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttempts: -5 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttempts: [] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttempts: {} })), [])
+  })
+
+  t.test('should fail to find if heartbeatAttemptsWait is defined but not a valid number', function() {
+    assert.deepStrictEqual(util.getAppNames(getBase()), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttemptsWait: null })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttemptsWait: 5 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttemptsWait: 15 })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttemptsWait: 1000 })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttemptsWait: 'asdf' })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttemptsWait: '1234' })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttemptsWait: 0 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttemptsWait: -5 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttemptsWait: [] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatAttemptsWait: {} })), [])
+  })
+
+  t.test('should fail to find if heartbeatPath is defined but not a valid string', function() {
+    assert.deepStrictEqual(util.getAppNames(getBase()), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatPath: null })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatPath: 5 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatPath: 15 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatPath: 1000 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatPath: 'asdf' })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatPath: '1234' })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatPath: '/asdf' })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatPath: '/1234' })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatPath: 0 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatPath: -5 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatPath: [] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ heartbeatPath: {} })), [])
+  })
+  
+  t.test('should fail to find if log is defined but not an array', function() {
+    assert.deepStrictEqual(util.getAppNames(getBase()), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: null })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: 5 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: 'asdf' })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: '1234' })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: 0 })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [] })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: {} })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: { length:1 }  })), [])
+  })
+  
+  t.test('should fail to find if log has an item but level and either stream or path ', function() {
+    assert.deepStrictEqual(util.getAppNames(getBase()), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: null })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [null] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [5] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [15] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [1000] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: ['asdf'] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: ['1234'] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: ['/asdf'] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: ['/1234'] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [0] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [-5] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [[]] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{}] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: null, path: 'log' }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 5, path: 'log' }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 0, path: 'log' }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: [], path: 'log' }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: {}, path: 'log' }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: '', path: 'log' }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'asdf', path: 'log' }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'fatal', path: 'log' }] })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'error', path: 'log' }] })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'warn', path: 'log' }] })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'info', path: 'log' }] })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'debug', path: 'log' }] })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'trace', path: 'log' }] })), ['app'])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'info', path: '' }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'info', path: null }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'info', path: 5 }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'info', path: 0 }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'info', path: [] }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'info', path: {} }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'info', stream: '' }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'info', stream: null }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'info', stream: 5 }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'info', stream: 0 }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'info', stream: [] }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'info', stream: {} }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'info', stream: 'asdf' }] })), [])
+    assert.deepStrictEqual(util.getAppNames(getBase({ log: [{ level: 'info', stream: 'process.stdout' }] })), ['app'])
   })
 })
 
@@ -227,6 +347,14 @@ t.describe('#verifyConfig()', function() {
 t.describe('#extractFile()', function() {
   var util = new Util(import.meta.url)
 
+  t.beforeEach(function() {
+    return Promise.all([
+      fs.rm('./test/testapp/example.tar', { force: true }),
+      fs.rm('./test/testapp/file1.txt', { force: true }),
+      fs.rm('./test/testapp/file2.txt', { force: true }),
+    ])
+  })
+
   t.afterEach(function() {
     return Promise.all([
       fs.rm('./test/testapp/example.tar', { force: true }),