Angular mock $ httpBackend给出没有待处理的请求

Question

按照angularJS $ httpBackend的官方指南,我会做这个测试,但是Karma给我这个错误: Error: No pending request to flush ! at Function.$httpBackend.flush

测试

'use strict';

describe('profileCtrl', function () {
var scope, $httpBackend;

beforeEach(angular.mock.module('maap'));
beforeEach(angular.mock.inject(function($rootScope, $controller, _$httpBackend_){

    $httpBackend = _$httpBackend_;
    $httpBackend.when('GET', 'profile').respond([{id: 1, name: 'Bob'}]);
    scope = $rootScope.$new();
    $controller('profileCtrl', {$scope: scope});
}))

it('should fetch list of users', function(){
    $httpBackend.flush();
    expectGET(scope.current_user.length).toBe(1);
    expect(scope.current_user[0].name).toBe('Bob');
});

});

这个简单的控制器:

'use strict';

 angular.module('maap').controller('profileCtrl', function($scope, UserService) {

$scope.current_user = UserService.details(0);

});

Answer 1

在_$httpBackend_没有任何冲洗,因为你不使你的测试任何HTTP请求.

您需要调用一些发出http请求的代码.

然后,一旦某个地方的某个地方在您的测试中发出了http请求,您就可以调用该flush方法,以便为已经发出的请求提供响应.

就像是:

it('should fetch list of users', function(){

    // Do something that will make an http request
    MyService.getAllUser(function ...) // for example

    // Then provide a response for the http request that 
    // has been made when getAllUser was called
    $httpBackend.flush();

    // Check the expected result.
    expect(something).toBe('Bob');
});

Answer 2

同样的问题发生在我身上,问题不在于我没有提出请求,而是因为我提出的请求与预期的请求不同:

例如,我已经定义了这个期望:

mockBackend.expectGET("http://myapi.com/001").respond("RESULT");

我正在请求其他网址:

http://myapi.com/002

非常混乱的错误消息,没有真正容易与下面的问题相关.