使用$httpBackend测试服务对$http的调用

var $httpBackend, $http;

beforeEach(inject(function(_$httpBackend_, _$http_) {
  $httpBackend = _$httpBackend_;
  $http = _$http_;
}));

$httpBackend.when('GET', '/api/data').respond(200, { message: 'Success' });

$http.get('/api/data').then(function(response) {
  // 处理响应结果
});

$httpBackend.flush();

$httpBackend.verifyNoOutstandingExpectation();

describe('MyService', function() {
  var MyService, $httpBackend, $http;

  beforeEach(module('myApp'));

  beforeEach(inject(function(_MyService_, _$httpBackend_, _$http_) {
    MyService = _MyService_;
    $httpBackend = _$httpBackend_;
    $http = _$http_;
  }));

  afterEach(function() {
    $httpBackend.verifyNoOutstandingExpectation();
    $httpBackend.verifyNoOutstandingRequest();
  });

  it('should make a GET request to /api/data', function() {
    $httpBackend.when('GET', '/api/data').respond(200, { message: 'Success' });

    MyService.getData();

    $httpBackend.flush();

    expect(MyService.data).toEqual({ message: 'Success' });
  });
});