Fix last bug in kill. Add better test to catch them.

lib/kill.mjs

@@ -4,12 +4,12 @@ import { spawn, exec } from 'child_process'
 const execPromise = promisify(exec)
 
 export default function kill(pid, signal) {
-  let pids = new Set()
+  let pids = new Set([pid])
   let getSpawn = null
 
   switch (process.platform) {
     case 'win32':
-      return execPromise('taskkill /pid ' + pid + ' /T /F')
+      return execPromise('taskkill /pid ' + pid + ' /T /F').then(() => pids)
     case 'darwin':
       getSpawn = function(parentPid) {
         return spawn('pgrep', ['-P', parentPid])
@@ -31,6 +31,7 @@ export default function kill(pid, signal) {
           if (err.code !== 'ESRCH') throw err;
         }
       }
+      return pids
     })
 }
 
@@ -49,9 +50,9 @@ function buildTree(allPids, spawnGetChildren, parentPid) {
       if (code !== 0) return res()
 
       res(Promise.all(
-        allData.match(/\d+/g)
+        data.match(/\d+/g)
           .map(Number)
-          .filter(pid => !bla.has(pid))
+          .filter(pid => !allPids.has(pid))
           .map(buildTree.bind(this, allPids, spawnGetChildren))
       ))
     })

test/kill/kill.test.mjs

@@ -1,4 +1,4 @@
-import { fork } from 'child_process'
+import { spawn } from 'child_process'
 import t from '../../lib/eltro.mjs'
 import assert from '../../lib/assert.mjs'
 import kill from '../../lib/kill.mjs'
@@ -13,7 +13,7 @@ t.describe('kill', function() {
   })
 
   t.test('should kill process correctly', function(done) {
-    worker = fork('./test/')
+    worker = spawn('node', ['./test/kill/runner.mjs'])
     assert.ok(worker.pid)
 
     worker.on('exit', done.finish(function(code, signal) {
@@ -22,4 +22,16 @@ t.describe('kill', function() {
 
     kill(worker.pid)
   })
+
+  t.test('should succeed in killing tree', async function() {
+    worker = spawn('node', ['./test/kill/runner.mjs'])
+    assert.ok(worker.pid)
+
+    // Give it some time to start
+    await new Promise(res => setTimeout(res, 1000))
+
+    return kill(worker.pid).then(function(pids) {
+      assert.strictEqual(pids.size, 2)
+    })
+  })
 })

test/kill/runner.mjs

@@ -1 +1,5 @@
-setInterval(function() {}, 1000)
+import { spawn } from 'child_process'
+
+spawn('node', ['./test/kill/second_runner.mjs'])
+
+setInterval(function() { }, 100)

test/kill/second_runner.mjs

@@ -0,0 +1 @@
+setInterval(function() { }, 100)