Task = require '../src/task'

describe "Task", ->
  describe "@once(taskPath, args..., callback)", ->
    it "terminates the process after it completes", ->
      handlerResult = null
      task = Task.once require.resolve('./fixtures/task-spec-handler'), (result) ->
        handlerResult = result

      processClosed = false
      processErrored = false
      childProcess = task.childProcess
      spyOn(childProcess, 'kill').andCallThrough()
      task.childProcess.on 'error', -> processErrored = true

      waitsFor ->
        handlerResult?

      runs ->
        expect(handlerResult).toBe 'hello'
        expect(childProcess.kill).toHaveBeenCalled()
        expect(processErrored).toBe false

  it "calls listeners registered with ::on when events are emitted in the task", ->
    task = new Task(require.resolve('./fixtures/task-spec-handler'))

    eventSpy = jasmine.createSpy('eventSpy')
    task.on("some-event", eventSpy)

    waitsFor (done) -> task.start(done)

    runs ->
      expect(eventSpy).toHaveBeenCalledWith(1, 2, 3)

  it "unregisters listeners when the Disposable returned by ::on is disposed", ->
    task = new Task(require.resolve('./fixtures/task-spec-handler'))

    eventSpy = jasmine.createSpy('eventSpy')
    disposable = task.on("some-event", eventSpy)
    disposable.dispose()

    waitsFor (done) -> task.start(done)

    runs ->
      expect(eventSpy).not.toHaveBeenCalled()
