JasmineJS/AngularJs：如何监视 $filter

Question

假设我们有一个使用filter 的service 函数。我们如何在 filter 上 spyOn 以确保它被调用？

Answer 1

试试下面的代码：

describe('myServiceTest', function() {
    var myServiceWhichCallsMyFilter;
    var myFilterSpy  = jasmine.createSpy('');

    beforeEach(module('myApp'));

    beforeEach(module(function ($provide) {
        $provide.value('myFilterFilter', myFilterSpy );
    }));

    beforeEach(inject(function (_myServiceWhichCallsMyFilter_) {
        myServiceWhichCallsMyFilter = _myServiceWhichCallsMyFilter_;
    }));

});