防止茉莉间谍聆听不当信息

Question

我如何告诉茉莉间谍只听我告诉它的信息，期望并忽略其他人？

例如：

例组

describe 'View', -> 
    describe 'render', -> 
    beforeEach -> 
     @view = new View 
     @view.el = jasmine.createSpyObj 'el', ['append'] 
     @view.render() 

    it 'appends the first entry to the list', -> 
     expect(@view.el.append).toHaveBeenCalledWith '<li>First</li>' 

    it 'appends the second entry to the list', -> 
     expect(@view.el.append).toHaveBeenCalledWith '<li>Second</li>' 

实施

class View 
    render: -> 
    @el.append '<li>First</li>', '<li>Second</li>' 

输出

View 
    render 
    appends the first entry to the list 
     Expected spy el.append to have been called \ 
     with [ '<li>First</li>' ] but was called \ 
     with [ [ '<li>First</li>', '<li>Second</li>' ] ] 

    appends the second entry to the list 
     Expected spy el.append to have been called \ 
     with [ '<li>Second</li>' ] but was called \ 
     with [ [ '<li>First</li>', '<li>Second</li>' ] ] 

Answer 1

有两个选项：

1.使用argsForCall间谍属性

it 'appends the first entry to the list', -> 
    expect(@view.el.append.argsForCall[0]).toContain '<li>First</li>' 

2.使用mostRecentCall对象的属性args

it 'appends the first entry to the list', -> 
    expect(@view.el.append.mostRecentCall.args).toContain '<li>First</li>' 

Answer 2

要清楚，你无法阻止间谍倾听。间谍会监听所有的功能调用并保存。但是，您可以通过使用argsForCall来超过每个呼叫。