import {EventEmitter, MixinOf} from '@avocado/composition'

import {Vector} from '@avocado/math'

describe 'Vector.Mixin', ->

  O = null
  spy = null

  beforeEach ->

    O = new class extends MixinOf(
      EventEmitter
      Vector.Mixin()
    )
    spy = jasmine.createSpy 'listener'

  it 'can detect changes', ->

    O.on 'xChanged', spy
    O.on 'yChanged', spy
    O.on 'vectorChanged', spy

    O.setVector [20, 20]

    expect(spy.callCount).toEqual 3

  it 'can detect changes in the correct order', ->

    accum = 300
    O.on 'xChanged yChanged', -> accum /= 10
    O.on 'vectorChanged', -> accum += 200

    O.setVector [20, 20]

    expect(accum).toEqual 203