预计间谍,却得到了功能 [英] Expected a spy, but got Function
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问题描述
我想实现一个试验(1)该模块(2)。结果
我的目的是检查,如果在触发特定事件的集合是牵强。结果
你可以从我的(2)我得到的消息错误评论看:预计间谍,却得到了功能
结果。
该模块工作,但测试失败。有任何想法吗?
(1)
//茉莉测试模块描述(当onGivePoints被激发',函数(){
beforeEach(函数(){
spyOn(this.view.collection,'restartPolling')andCallThrough()。
app.vent.trigger('onGivePoints');
});
它('板收集应取',函数(){
期待(this.view.collection.restartPolling).toHaveBeenCalled();
//错误:预期间谍,却得到了功能。
});
});
(2)
//模型视图模块
返回Marionette.CompositeView.extend({
初始化:功能(){
this.collection =新UserBoardCollection();
this.collection.startPolling();
app.vent.on('onGivePoints',this.collection.restartPolling);
},
//其他code
});
解决方案
您需要进入实际的方法,在这种情况下是在原型。
描述(当onGivePoints被激发',函数(){
beforeEach(函数(){
spyOn(UsersBoardCollection.prototype,'restartPolling')andCallThrough()。
app.vent.trigger('onGivePoints');
});
它('板收集应取',函数(){
期待(UsersBoardCollection.prototype.restartPolling).toHaveBeenCalled();
});
});
在原型间谍是一个很好的技巧,当你不能得到你想要刺探的实际情况下,你可以使用。
I am trying to implement a test (1) for this module (2).
My purpose is to check if the collection is fetched when a particular event is triggered.
As you can see from my comment in (2) I get the message Error: Expected a spy, but got Function.
The module works but the test fails. any ideas?
(1)
// jasmine test module
describe('When onGivePoints is fired', function () {
beforeEach(function () {
spyOn(this.view.collection, 'restartPolling').andCallThrough();
app.vent.trigger('onGivePoints');
});
it('the board collection should be fetched', function () {
expect(this.view.collection.restartPolling).toHaveBeenCalled();
// Error: Expected a spy, but got Function.
});
});
(2)
// model view module
return Marionette.CompositeView.extend({
initialize: function () {
this.collection = new UserBoardCollection();
this.collection.startPolling();
app.vent.on('onGivePoints', this.collection.restartPolling);
},
// other code
});
解决方案
You need to get into the actual method, which in this case is on the prototype.
describe('When onGivePoints is fired', function () {
beforeEach(function () {
spyOn(UsersBoardCollection.prototype, 'restartPolling').andCallThrough();
app.vent.trigger('onGivePoints');
});
it('the board collection should be fetched', function () {
expect(UsersBoardCollection.prototype.restartPolling).toHaveBeenCalled();
});
});
Spying on the prototype is a nice trick you can use when you can't get to the actual instance you want to spy on.
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