Backbone.js 用Jasmine监视主干视图回调方法
我有以下看法:Backbone.js 用Jasmine监视主干视图回调方法,backbone.js,view,jasmine,spy,Backbone.js,View,Jasmine,Spy,我有以下看法: ... var TreeView = Backbone.View.extend({ el: '#org-tree', initialize: function() { eventBus.on("route:change", _.bind(this.triggerFilterEvent, this)); }, render: function() { ... }, foo: function() { console.
...
var TreeView = Backbone.View.extend({
el: '#org-tree',
initialize: function() {
eventBus.on("route:change", _.bind(this.triggerFilterEvent, this));
},
render: function() { ... },
foo: function() { console.log("foo"); },
triggerFilterEvent: function(name) {
this.foo();
...
}
});
...
我的规范如下所示:
describe('TreeView', function() {
var treeView = new TreeView();
it('calls triggerFilterEvent when receiving a route:change', function() {
spyOn(treeView, 'triggerFilterEvent');
spyOn(treeView, 'foo');
treeView.delegateEvents();
eventBus.trigger("route:change", "test");
console.log('TriggerCOunt:' + treeView.triggerFilterEvent.callCount);
console.log('FooCount: ' + treeView.foo.callCount);
expect(treeView.triggerFilterEvent).toHaveBeenCalled();
});
});
我按照以下解决方案中的建议添加了treeView.delegateEvents()
:
但是,我的测试仍然失败:
LOG: 'triggerFilterEvent with: test'
LOG: 'Event has been triggered: route:change'
LOG: 'TriggerCOunt:0'
LOG: 'FooCount: 1'
Error: Expected spy triggerFilterEvent to have been called.
方法foo按预期调用了一次,这是怎么回事?问题在于,当您在
triggerFilterEvent
上分配间谍时,事件侦听器已设置为调用原始函数而不是间谍(initialize
在初始化视图时被调用)
在初始化视图之前,要绕过可以监视原型的问题,请执行以下操作:
spyOn(TreeView.prototype, 'triggerFilterEvent');
var treeView = new TreeView();