Adds a Given/When/Then DSL to mocha as an alternative style for specs
CoffeeScript JavaScript
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rendro Merge pull request #24 from rendro/greenkeeper-coffee-script-1.12.3
Update coffee-script to version 1.12.3 🚀
Latest commit 9ae1d68 Feb 22, 2017


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Mocha-given is a mocha interface that helps you write cleaner specs using Given, When, Then and And. It is a shameless port of Justin Searls' jasmine-given which is a tribute to Jim Weirich's terrific rspec-given gem.

Example Specs

describe 'assigning stuff to this', ->
	Given -> @number = 24
	When  -> @number++
	And   -> @number *= 2
	Then  -> @number == 50

describe 'assigning stuff to variables', ->
	subject = null
	Given -> subject = []
	When  -> subject.push('foo')
	Then  -> subject.length == 1

describe 'Testing deferred', ->
	Given -> @t =
	Then.after 1500, 'so much time has passed', -> - @t >= 1500

describe 'Testing async', ->
	Given -> @subject = new User()
	Then 'save user', (done) ->;

Run tests

Global installation of mocha

If you have mocha installed globally you need to install mocha-given globally as well.

$ npm install -g mocha mocha-given

Then you can run your tests by setting the interface of mocha to mocha-given

$ mocha -u mocha-given --compilers coffee:coffee-script -R spec

Local installation of mocha

If you have installed mocha and mocha-given locally

$ npm install mocha-given coffee-script

you have to call the mocha binary directly:

$ ./node_modules/.bin/mocha -u mocha-given --compilers coffee:coffee-script -R spec

Run mocha-given tests & start contributing

To run the mocha-given tests for developing, it has to be symlinked into the node_modules folder to enable mocha to resolve mocha-given.

Therefore run the script:

$ npm run link

Afterwards mocha has to be installed with $ npm install mocha.

Now you can run the tests using $ npm tests and start contributing.

Run tests programmatically

var Mocha = require('mocha');
var fs    = require('fs');
var path  = require('path');

// require mocha-given after Mocha is set

// the directory with your tests/specs
var testDir = 'tests';

// First, you need to instantiate a Mocha instance.
var mocha = new Mocha({
	ui: 'mocha-given',
	reporter: 'spec'

// Get test files
	// allow javascript and coffescript files
	return file.match(/\.(coffee|js)$/);
		path.join(testDir, file)

// Now, you can run the tests.{
  process.on('exit', function () {

Run from command line (with mocha and mocha-given installed):

$ node runtests.js


Thanks to SinnerSchrader for their support and the time to work on this project.