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我编写 Backbone.Collection 来加载 JSON 文件并在 Backbone.View 中使用

这是我的 Backbone.Collection

class Backbone.Config extends Backbone.Collection

  initialize: (filename = 'settings') ->
    @_load(filename)

  # private load setting file
  _load: (filename) ->
    @fetch
      url : "/assets/backbone/config/#{filename}.json"
      error: (e,data) ->
        if data.status == 404
          throw "Exception: Cant find such a file #{filename}.json"
        else if data.status == 200
          throw "Exception: can't load json file. please check your JSON syntax"

  get: ->
    @.toJSON()[0]

我在我的 Backbone.View 中使用它

像这样

 error: ->
     @displayMessage @config.get().form.display_message.error, 'red', 3000

这很好，但是当我用茉莉花为它写测试时，

描述“事件”，->

 beforeEach ->
    @view.config       = new Backbone.Config()
    @successSpy        = sinon.spy @view, 'success'
    @errorSpy          = sinon.spy @view, 'error'
    @displayMessageSpy = sinon.spy @view, 'displayMessage'
    @confirmUnloadSpy  = sinon.spy @view, 'confirmUnload'
    @formChangedSpy    = sinon.spy @view, 'formChanged'
    @view.delegateEvents()

  it "success will called when 'ajax:success' is fired and form error has occured", ->
    @view.$el.trigger 'ajax:success', ['',{'error','','','error_message'}, '']
    expect(@successSpy).toHaveBeenCalled()

  it "fail ajax request, will call error method", ->
    @view.$el.trigger 'ajax:failure'
    expect(@errorSpy).toHaveBeenCalled()
    expect(@displayMessageSpy).toHaveBeenCalled()

  it 'confirmUnload called when page reloaded', ->
    @view.$el.trigger 'beforeunload'
    expect(@confirmUnloadSpy).toHaveBeenCalled()

  it 'when form changed, formChanged method call', ->
    @view.$el.trigger 'change'
    expect(@formChangedSpy).toHaveBeenCalled()

但我在茉莉花中出错了

TypeError: Cannot read property 'form' of undefined

所以，我的问题是

为什么我在使用 Backbone.Collection 测试 Backbone.View 时出现错误？>

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0 回答 0