Update README.md

This commit is contained in:
Jonatan Nilsson 2020-03-31 17:21:36 +00:00 committed by GitHub
parent c487ae6d5c
commit 30eadbe730
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23

178
README.md
View file

@ -1,2 +1,176 @@
# node-casette # casette
No-dependancy test framework for node Casette is a no-nonsense, no dependancy small test framework created to use in node 13 with ECM.
# Installation
Install with npm globally:
```bash
$ npm install --global casette
```
or as a development dependency for your project:
```bash
$ npm install --save-dev casette
```
# Getting started
```bash
$ npm install --save-dev casette
$ mkdir test
```
Next in your favourite editor, create `test/test.js`:
```node
import { Casette as c, assert} from 'casette'
c.describe('Array', function() {
c.describe('#indexOf()', function() {
c.test('should return -1 when value is not present', function() {
assert.equal([1,2,3].indexOf(4), -1)
})
})
})
```
Set up a test script in package.json:
```json
"scripts": {
"test": "mocha"
}
```
Then run tests with:
```bash
$ npm test
test/test.mjs
√ Array #indexOf() should return -1 when value is not present
1 passing (3ms)
```
# Assertions
Not only does casette allow you to use any assertion library of your own choosing, it also comes with it's own assertion library based on node's default [assert](https://nodejs.org/api/assert.html) with a few extra methods:
* `assert.notOk(value, [message])`: Assert value is not ok.
* `assert.match(value, test, [message])`: Check if value matches RegExp test.
* `assert.notMatch(value, [message])`: Check if value does not match RegExp test.
* `assert.isFulfilled(promise, [message])`: Assert the promise resolves.
* `assert.isRejected(promise, [message])`: Assert the promise gets rejects.
# Asynchronous Code
Casette supports any type of asynchronous code testing. It can either be done by adding a parameter to the function (usually done) that gets called once the tests done but casette also supports promises.
Example of testing using done:
```node
import { Casette as c, assert} from 'casette'
c.describe('User', function() {
c.describe('#save()', function() {
c.test('should save without error', function(done) {
var user = new User('Luna')
user.save(function(err) {
if (err) done(err)
else done()
})
})
})
})
```
Alternatively, just use the done() callback directly (which will handle an error argument, if it exists):
```node
import { Casette as c, assert} from 'casette'
c.describe('User', function() {
c.describe('#save()', function() {
c.test('should save without error', function(done) {
var user = new User('Luna')
user.save(done)
})
})
})
```
Or another alternative is to use promises and return a promise directly:
```node
import { Casette as c, assert} from 'casette'
c.test('should complete this test', function(done) {
return new Promise(function(resolve, reject) {
reject(new Error('Uh oh, something went wrong'))
}).then(done)
})
```
Which works well with `async/await` like so:
```node
c.test('async test', async function() {
let user = await User.find({ username: 'test' })
assert.ok(user)
})
```
# Api
### c.test(message, func)
Queue up the `func` as a test with the specified message.
### c.describe(message, func)
In case you wanna describe a bunch of tests, you can add them inside `func` and it will have the specified `message` prepended before every test:
```node
import { Casette as c, assert} from 'casette'
function someFunction() { return true }
c.test('#someFunction()', function() {
c.test('should always return true', function() {
assert.strictEqual(someFunction(), true)
assert.strictEqual(someFunction(), true)
assert.strictEqual(someFunction(), true)
}).skip()
})
```
will output:
```bash
#someFunction() should always return true
```
### c.test(...).skip()
You can skip tests easily by adding `.skip()` after the test like so:
```node
c.test('Skip due to something being broken', function() {
BrokenFunction()
}).skip()
```
### c.test(...).timeout(dur)
Tests can take a long time. By default, casette will cancel a test if it takes longer than 2 seconds. You can however override this by calling the timeout function after the test with the specified duration in milliseconds like so:
```node
c.test('This is a really long test', async function() {
await DoSomethingForReallyLongTime()
}).timeout(5000) // 5 seconds
```