不調用Jasmine spy document.execCommand

Question

我寫了這樣的測試

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');
    });
});

但它失敗了Expected spy execCommand to have been called with [ 'foreColor', false, 'red' ] but it was never called. 我不知道為什么？

請幫忙。

注意：我使用grunt-contrib-jasmine 0.9.2運行它

Answer 1

Jasmine的expect函數是一個斷言，而不是一個斷言，它將在it塊結束時運行，切換順序看它是否正常工作：

 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'); }); }); 

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