如何真正重置$ httpBackend期望？

问题描述

我试过，并试图得到这个工作。该是简洁的，充其量：

I've tried and tried to get this to work. The documentation is terse, at best:

resetExpectations（）; - 将所有的请求的期望，但preserves所有后端定义。通常情况下，你会多阶段测试中，当你想重用$同一实例调用resetExpectations httpBackend模拟。

resetExpectations(); - Resets all request expectations, but preserves all backend definitions. Typically, you would call resetExpectations during a multiple-phase test when you want to reuse the same instance of $httpBackend mock.

每一个我的第二个请求被调用时，我的成绩总是第一个结果的数据。看看这个小提琴，我重置后的期望第一次冲水，然后设置新的期望/结果然后再冲洗，产生不正确的数据。

Every time my second request is called, my result always has the first result's data. Check out this fiddle http://jsfiddle.net/tbwn1gt0/2/ where I reset the expectations after the first flush, then set new expectations/result then flush again to yield the incorrect data.

// --- SPECS -------------------------
var url = '/path/to/resource';
var result = '';

describe('$httpBackend', function () {

    it("expects GET different results in subsequent requests", inject(function ($http, $httpBackend) {

        successCallback = function(data){
            result = data;
        }
        // Create expectation
        $httpBackend.expectGET(url).respond(200, 'mock data');

        // Call http service
        $http.get(url).success(successCallback);

        // flush response
        $httpBackend.flush();
        console.log( result ); // logs 'mock data'

        // Verify expectations
        expect( result ).toContain('mock data'); // works as it should

        // reset the expectations
        $httpBackend.resetExpectations();

        // set the fake data AGAIN
        $httpBackend.expectGET(url).respond(200, 'doof the magic cragwagon');

        // get the service AGAIN
        $http.get(url).success(successCallback);
        expect( result ).toContain('doof'); // does not work, result is original result
        console.log( result ); // logs 'mock data'

    }));

});

// --- Runner -------------------------
(function () {
    var jasmineEnv = jasmine.getEnv();
    jasmineEnv.updateInterval = 1000;

    var htmlReporter = new jasmine.HtmlReporter();

    jasmineEnv.addReporter(htmlReporter);

    jasmineEnv.specFilter = function (spec) {
        return htmlReporter.specFilter(spec);
    };

    var currentWindowOnload = window.onload;

    window.onload = function () {
        if (currentWindowOnload) {
            currentWindowOnload();
        }
        execJasmine();
    };

    function execJasmine() {
        jasmineEnv.execute();
    }

})();

我试过其他的事情包括增加与resetExpectations（投入新的IT陈述每个请求）的afterEach。等随意尝试的转换。如果试图改变预期的URL的东西不是预期的，它的错误，因为它should--所以我知道的要求越来越至少是通过httpBackend处理。

Other things I've tried include adding an afterEach with resetExpectations (putting each request in a new it statement). and a slew of other random attempts. If it try to change the expected url to something not expected, it errors as it should-- so I know the requests are getting handled through httpBackend at the very least.

这是一个缺陷还是我错误地执行了吗？

Is this a defect or am I implementing it incorrectly?

推荐答案

的 .resetExpectations（）做的工作如你预期，但你只是忘了冲件的http请求对于第二个

The .resetExpectations() does work as you expected, but you just forgot to flush a http request for the second one.

// set the fake data AGAIN
$httpBackend.expectGET(url).respond(200, 'doof the magic cragwagon');

// get the service AGAIN
$http.get(url).success(successCallback);

$httpBackend.flush(); // flush the second http request here

expect( result ).toContain('doof'); // does not work, result is original result
console.log( result ); // logs 'mock data'

示例的jsfiddle：

PS。其实， $ httpBackend.resetExpectations（）没有必要为你的测试用例。

PS. Actually, the $httpBackend.resetExpectations() is not necessary for your test case.

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