Error: loginService.loginTest(...).then is not a function
$scope.login@http://localhost/Clickstar/app/controller/loginController.js:15:3
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 angular.min.js:84:35

<div>

    <div>
      <form method="post" ng-submit="login()">
            <input name="username" type="text" ng-model="username" placeholder="username"><br>
            <input name="password" type="password" ng-model="password" placeholder="password"><br>
            <input type="submit" value="Login" class="center-button">
        </form>
    </div>

    <div ng-show="Login.success">
            Username: {{Login.loginUsername}} <br>
            Password: {{Login.loginPassword}} <br>
            UserID: {{Login.usernID}} <br>


    </div>


</div>

app.service('loginService', function($http, $q) {


    this.loginTest = function(username, password)
    {

        var dummyData = {   "username" : username,
                            "password" : password,
                            "userID" : 007,
                            "loginStatus" : 1
        };

        return dummyData;

    };

    return this;

});

app.controller('loginController', function ($scope, loginService) {

    var vm = this;
    vm.loginUsername = null;
    vm.loginPassword = null;
    vm.usernID = null;
    vm.success = null;


    $scope.login = function(){
        vm.loginUsername = $scope.username;
        vm.loginPassword = $scope.password;


        loginService.loginTest($scope.username, $scope.password)
        .then(function(dummyData){

            vm.loginUsername = dummyData.username;
            vm.loginPassword = dummyData.password;
            vm.usernID = dummyData.userID;

            if(dummyData.loginStatus == 1){
                vm.success = true;
            }
            else{
                vm.success = false;
            }
        })

    };
});