eventric-testing/src/fake_promise.spec.coffee

Testing helpers for eventric.js

describe 'fake promise', ->

  fakePromise = require './fake_promise'

  promiseMock = null
  handler = null
  args = null

  beforeEach ->
    promiseMock =
      then: sandbox.stub()
      catch: sandbox.stub()
    handler = sandbox.stub()

    args = foo: 'bar'


  describe '#resolve', ->
    it 'should create a fake promise which is resolved synchronously with the given arguments', ->
      fakePromise.resolve(args).then handler
      expect(handler).to.have.been.calledWith args

    it 'should return the promise from the handler function if provided', ->
      handler.returns promiseMock
      promise = fakePromise.resolve(args).then handler
      expect(promise.then).to.be.a 'function'


  describe '#reject', ->
    it 'should create a fake promise which is rejected synchronously with the given arguments', ->
      fakePromise.reject(args).catch handler
      expect(handler).to.have.been.calledWith args


    it 'should return the promise from the handler function if provided', ->
      handler.returns promiseMock
      promise = fakePromise.reject(args).catch handler
      expect(promise.then).to.be.a 'function'


  describe '#resolveAsync', ->
    it 'should create a fake promise which is resolved asynchronously with the given arguments', (done) ->
      fakePromise.resolveAsync(args).then handler
      setTimeout ->
        expect(handler).to.have.been.calledWith args
        done()
      , 0


  describe '#reject', ->
    it 'should create a fake promise which is rejected asynchronously with the given arguments', (done) ->
      fakePromise.rejectAsync(args).catch handler
      setTimeout ->
        expect(handler).to.have.been.calledWith args
        done()
      , 0