Spies instead of $httpbackend

'use strict';
// from file: manageiq/spec/javascripts/services/middleware_add_datasource_service_spec.js
// https://github.com/mtho11/manageiq/blob/3b19676bf461a974946f0fffa8914612dc2568ef/spec/javascripts/services/middleware_add_datasource_service_spec.js#L29-L29

describe('mwAddDataSourceService', function () {

  var mwAddDataSourceService, httpMock, $http;

  beforeEach(module('ManageIQ'),function($provide, _$http_){
    $http = _$http_;
    $provide.value('$http', httpMock);
    spyOn($http, 'post');
   // httpMock = jasmine.createSpy($http, ['post']);
  });

  beforeEach(inject(function($injector) {
    mwAddDataSourceService = $injector.get('mwAddDataSourceService');
  }));

  describe('Test Add Datasource', function() {

    it('should supply a list of datasources', function () {
      var dsList = mwAddDataSourceService.getDatasources();
      expect(dsList).toBeDefined();
      expect(dsList.length).toBeGreaterThan(1);
    });

    it('should submit add_datasource via json/POST', function () {
      var dsPayload = {
        'id': 1,
        'xaDatasource': false,
        'datasourceName': 'H2DS',
        'jndiName': 'java:/H2DS',
        'driverName': 'h2',
        'driverClass': 'org.h2.Driver',
        'connectionUrl': 'jdbc:h2:mem:test;DB_CLOSE_DELAY=-1',
        'userName': 'jdoe',
        'password': 'password',
        'securityDomain': ''
      };

      mwAddDataSourceService.sendAddDatasource(dsPayload);
      expect($http.post).toHaveBeenCalled();

    });
  });

});