Jasmine unit test not getting success call

When I called the mocking data in service the promises working for resolve. But i called the service in controller it is not calling the success call back.

code:

Service:
    getHistory: function(deviceId,historyDataCount){
        var deferred = $q.defer();
        $http.get(historyDataCall+deviceId+"/"+historyDataCount).then(function successCallback(response){
           return deferred.resolve(response.data);
        }, function errorCallback (response) {
            deferred.reject(response);
            return response;
        });
        return deferred.promise;
    },

Unit test:

    service.getMachine(machineId);
    service.getHistory(deviceObj.deviceId,5);
    httpBackend.expect('GET', '/v1/machine/22')
       .respond(200,mock_SingleMachine);
    httpBackend.expect('GET', '/v1/devices/history/19442/5')
        .respond(200,mock_Machine_History);
    httpBackend.flush();
   scope.History();

Controller: $scope.History() { var deffered = $q.defer(); backendServices.getHistory(deviceId, historyDataCount).then(function successCallback(response) { console.log(response); }

         } 

Here Not getting the scuccessCallback to check the response.