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我正在为 react+flux 应用程序中的商店编写单元测试。我按照此处设置模拟调度程序的示例进行操作，我的单元测试如下所示：

jest.dontMock "../../app/scripts/stores/item_store.coffee"
jest.dontMock "object-assign"

describe 'ItemStore', ->
  ShopConstants = require "../../app/scripts/constants/shop_constants.coffee"
  ShopDispatcher = undefined
  ItemStore = undefined
  callback = undefined

  actionBuildQueryString =
    source: "VIEW_ACTION"
    action:
      type: ShopConstants.ActionTypes.BUILD_QUERY_STRING
      size: "4"

  actionReceiveFilterRespData =
    source: "SERVER_ACTION"
    action:
      type: ShopConstants.ActionTypes.RECEIVE_FILTER_RESP_DATA
      data: {item: {} }

  beforeEach ->
    ShopConstants = require "../../app/scripts/constants/shop_constants.coffee"
    ShopDispatcher = require "../../app/scripts/dispatchers/shop_dispatcher.coffee"
    ItemStore = require "../../app/scripts/stores/item_store.coffee"
    callback = ShopDispatcher.register.mock.calls[0][0]

  it "registers a callback with the dispatcher", ->
    expect(ShopDispatcher.register.mock.calls.length).toBe(1)

在我的 item_store.coffee 文件中，我向调度员注册，如下所示：

ShopDispatcher.register (payload) ->
  action = payload.action

  switch action.type

    when ActionTypes.BUILD_QUERY_STRING
      WebApiUtils.fetchItems(payload)

    when ActionTypes.RECEIVE_FILTER_RESP_DATA
      _setItems(action.data)

  ItemStore.emitChange()

我希望模拟的 Dispatcher 注册回调，因为这发生在实际的 item_store 文件中，我告诉 jest 不要模拟。但是，由于 ShopDispatcher.register 是未定义的，它没有被注册，但我不太清楚为什么。任何帮助表示赞赏。

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1 回答 1

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我也面临同样的问题。而不是使用 ShopDispatcher.register.mock.calls[0][0]try ShopDispatcher.dispatch。下面的代码非常适合我（使用类型脚本）。

beforeEach(function () {   
    dispatcher = require("../../../src/App/Dispatcher");
    localeStore = require("../../../src/stores/localestore");
    localeAction = require("../../../src/actions/Locale/LocaleAction");
}

it("should translate the element with the value in current locale JSON", function () {
   localeChangeAction = new localeAction(true, locale, localeJson);
   dispatcher.dispatch(localeChangeAction);

   var translatedText = localeStore.instance.TranslateText("login.login-header");
        expect(translatedText).toEqual("Login header");
});
于 2016-01-12T15:50:25.973 回答