問題描述

我無法讓我的單元測試正常工作.我有一個 $scope 數(shù)組，它一開始是空的，但應該用 $http.get() 填充.在真實環(huán)境中，數(shù)組中大約有 15 個左右的對象，但對于我的單元測試，我只抓了 2 個.對于單元測試，我有:

I'm unable to get my unit test to work properly. I have a $scope array that starts out empty, but should be filled with an $http.get(). In the real environment, there'd be approx 15 or so objects in the array, but for my unit test I just grabbed 2. For the unit test, I have:

expect($scope.stuff.length).toBe(2);

但是 jasmine 的錯誤是:Expected 0 to be 2.

But jasmine's error is: Expected 0 to be 2.

這是我的 controller.js:

here's my controller.js:

$scope.stuff = [];
$scope.getStuff = function () {
    var url = site.root + 'api/stuff';
    $http.get(url)
        .success(function (data) {
            $scope.stuff = data;
        })
        .error(function(error) {
            console.log(error);
        });
};

而我的 controller.spec.js 是:

and my controller.spec.js is:

/// <reference path="../../../scripts/angular-loader.min.js" />
/// <reference path="../../../scripts/angular.min.js" />
/// <reference path="../../../scripts/angular-mocks.js" />
/// <reference path="../../../scripts/angular-resource.js" />
/// <reference path="../../../scripts/controller.js" />
beforeEach(module('ui.router'));
beforeEach(module('ngResource'));
beforeEach(module('ngMockE2E'));
beforeEach(module('myApplication'));
var $scope;
var controller;
var httpLocalBackend;

beforeEach(inject(function ($rootScope, $controller, $injector) {
    $scope = $rootScope.$new();
    controller = $controller("StuffController", {
        $scope: $scope
    });
}));

beforeEach(inject(function ($httpBackend) {
    httpLocalBackend = $httpBackend;
}));

it('should get stuff', function () {
    var url = '/api/stuff';
    var httpResponse = [{ "stuffId": 1 }, { "stuffId": 2 }];
    httpLocalBackend.expectGET(url).respond(200, httpResponse);
    $scope.getStuff();
    expect($scope.stuff.length).toBe(2);
    //httpLocalBackend.flush();
} );

現(xiàn)在，很明顯，我更改了變量名稱等，因為這是為了工作，但希望這對任何人都有足夠的信息來幫助我.如果需要，我可以提供更多.取消注釋 .flush() 行時，我還會遇到第二個錯誤，但稍后我會談到.

Now, obviously, I changed variable names and such since this is for work, but hopefully this is enough information for anybody to help me. I can provide more if needed. I also get a second error when uncommenting the .flush() line, but I'll get to that a bit later.

非常感謝任何幫助，并在此先感謝！

Any help is greatly appreciated and thanks in advance!

終于搞定了！這是我的最終代碼:

Finally got it working! Here's my final code:

it('should get stuff', function () {
    var url = '/api/stuff';
    var httpResponse = [{ "stuffId": 1 }, { "stuffId": 2 }];
    httpLocalBackend.expectGET(url).respond(200, httpResponse);
    $scope.getStuff();
    httpLocalBackend.flush();
    expect($scope.stuff.length).toBe(2);
} );

編輯 2:我遇到了另一個問題，我認為這可能是其根本原因.請參閱在啟動時調用函數(shù)時單元測試失敗

EDIT 2: I ran into another problem, which I think may have been the root cause of this. See Unit test failing when function called on startup

推薦答案

需要在expect($scope.stuff.length).toBe(2)之前放置httpLocalBackend.flush()語句.發(fā)出請求后，您需要刷新它以使數(shù)據(jù)在您的客戶端代碼中可用.

You need to place httpLocalBackend.flush() statement before expect($scope.stuff.length).toBe(2). Once you make a request you need to flush it for the data to be available in your client code.

it('should get stuff', function () {
    var url = '/api/roles';
    var httpResponse = [{ "stuffId": 1 }, { "stuffId": 2 }];
    scope.getStuff(); //Just moved this from after expectGET
    httpLocalBackend.expectGET(url).respond(200, httpResponse);
    httpLocalBackend.flush();
    expect($scope.stuff.length).toBe(2);
} );

試試這個.

這篇關于AngularJs Jasmine 單元測試中的 $httpBackend的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！