茉莉花间谍document.execCommand不叫

Question

我写这样

describe('execCommand', function() { 
    it('should call document.execCommand', function() { 
     spyOn(document, 'execCommand').and.callThrough(); 
     expect(document.execCommand).toHaveBeenCalledWith('foreColor', false, 'red'); 
     document.execCommand('foreColor', false, 'red'); 
    }); 
}); 

测试但未能Expected spy execCommand to have been called with [ 'foreColor', false, 'red' ] but it was never called.，我不知道为什么？

请帮忙。

注：我运行它使用grunt-contrib-jasmine0.9.2

Answer 1

茉莉花expect功能就是在那个时候，而不是将在it块结束运行断言断言，切换才能看到它的工作：

describe('execCommand', function() { 
 
    it('should call document.execCommand', function() { 
 
    spyOn(document, 'execCommand').and.callThrough(); 
 
    document.execCommand('foreColor', false, 'red'); 
 
    expect(document.execCommand).toHaveBeenCalledWith('foreColor', false, 'red'); 
 
    }); 
 
});

<link href="//safjanowski.github.io/jasmine-jsfiddle-pack/pack/jasmine.css" rel="stylesheet" /> 
 
<script src="//safjanowski.github.io/jasmine-jsfiddle-pack/pack/jasmine-2.0.3-concated.js"></script>