mocha-given

Adds a Given-When-Then DSL to mocha as an alternative style for specs

npm install mocha-given
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mocha-given

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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 = Date.now()
    Then.after 1500, 'so much time has passed', -> Date.now() - @t >= 1500

describe 'Testing async', ->
    Given -> @subject = new User()
    Then 'save user', (done) -> @subject.save(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:coffeescript -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:coffeescript -R spec

Run tests programmatically

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

// require mocha-given after Mocha is set
require('mocha-given');

// 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
fs.readdirSync(testDir).filter(function(file){
    // allow javascript and coffescript files
    return file.match(/\.(coffee|js)$/);
}).forEach(function(file){
    mocha.addFile(
        path.join(testDir, file)
    );
});

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

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

$ node runtests.js
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