fakeWindow =
  scroll: sinon.spy()
  scrollTop: sinon.stub().returns(0)
  height: sinon.stub().returns(40)
element = jQuery('<div id="specTail"></div>')
log     = jQuery('<div id="specLog"></div>')
tail = new Travis.Tailing(fakeWindow, '#specTail', '#specLog')
tail.tail = -> element
tail.log  = -> log

module "Travis.Tailing",
  setup: ->
    jQuery('body').append(element)
    jQuery('body').append(log)

  teardown: ->
    element.remove()
    log.remove()
    tail.stop()

test "toggle", ->
  equal(element.hasClass('active'), false)
  tail.toggle()
  equal(element.hasClass('active'), true)
  tail.toggle()
  stop()

  Ember.run.later ->
    start()
    equal(element.hasClass('active'), false)
  , 300

test "active", ->
  equal(tail.active(), false)
  element.addClass('active')
  equal(tail.active(), true)

test "autoscroll when inactive", ->
  tail.scrollTo = sinon.spy()

  equal(tail.active(), false)
  equal(tail.autoScroll(), false)
  equal(tail.scrollTo.called, false)

test "autoscroll", ->
  element.addClass('active')
  log.offset = -> {top: 1}
  log.outerHeight = -> 1

  equal(tail.active(), true)
  equal(tail.autoScroll(), true)
  equal(fakeWindow.scrollTop.calledWith(2), true)

test "autoscroll when we're at the bottom", ->
  element.addClass('active')
  log.offset = -> {top: 0}
  log.outerHeight = -> 0

  equal(tail.active(), true)
  equal(tail.autoScroll(), false)
  equal(fakeWindow.scrollTop.calledWith(0), false)

test 'should stop scrolling if the position changed', ->
  element.addClass('active')
  tail.position = 100
  tail.onScroll()
  equal(element.hasClass('active'), false)

test 'positionButton adds the scrolling class', ->
  log.offset = -> {top: -1}

  tail.positionButton()
  equal(element.hasClass('scrolling'), true)
  equal(element.hasClass('bottom'), false)

test 'positionButton removes the scrolling class', ->
  log.offset = -> {top: 1}
  tail.positionButton()
  equal(element.hasClass('scrolling'), false)
  equal(element.hasClass('bottom'), false)

test 'positionButton sets the button as bottom', ->
  log.offset  = -> {top: -100}
  log.height  = -> 50
  tail.height = -> 1

  tail.positionButton()
  equal(element.hasClass('scrolling'), false)
  equal(element.hasClass('bottom'), true)