Angular injecting $service results in Unknown provider: $serviceProvider

问题

Why when I run this in the karma runner:

describe('Service tests', function () {


    var DataServiceMock
    var httpBackend;


    beforeEach(angular.mock.module('app'));

 beforeEach(angular.mock.inject(function( $httpBackend, $service, DataService,  $injector){

results in this error

Error: [$injector:unpr] Unknown provider: $serviceProvider <- $service http://errors.angularjs.org/1.2.1/$injector/unpr?p0=%24serviceProvider%20%3C-%20%24service at /home/site/angular/angular.js:78:12

Edit 2____________________

I'm trying to mock the DataService for the dataHandlerService

describe('Service', function () {


    var DataServiceMock
    var httpBackend;

    var testUrl = "test/";

    beforeEach(angular.mock.module('app'));

  beforeEach(angular.mock.inject(function(){
    module(function ($provide) {
            $provide.value('DataService', DataServiceMock)
        })
    }));

    it('should have', inject(function(DataService) {
        expect('DataService').not.toBe(null);
    }));

and this error:

Error: Injector already created, can not register a module! at workFn (/home/me/root/angular/angular-mocks.js:1985:15)

回答1:

There is no $service. If you want to mock your service then you should do it by using $provide:

beforeEach(function () {
  DataServiceMock= {}
  DataServiceMock.doSomething = function() {}
  module(function ($provide) {
    $provide.value('DataService', DataServiceMock)
  })
})

来源：https://stackoverflow.com/questions/21186368/angular-injecting-service-results-in-unknown-provider-serviceprovider

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angularjs

jasmine