Testing the Angular/Ionic project through unit tests

Question

Testing the Angular/Ionic project through unit tests

I am facing a challenge with my controller code, which appears to be quite simple. Here is a snippet of the controller:

timeInOut.controller('timeInOutController', function($scope, $filter, $ionicScrollDelegate){

    ... 

});

However, when attempting to create a unit test for this controller, I encounter an error:

(function() {
'use strict';

    var scope, controller, filter;

    describe('timeInOutController', function () {

        beforeEach(module('common.directives.kmDateToday'));

        beforeEach(inject(function ($rootScope, $controller, $filter) {
            scope = $rootScope.$new();
            filter = $filter;
            controller = $controller('timeInOutController', {
                $scope: scope
            });
        }));

        describe('#date setting', function(){

            ...

        });
    });
})();

The error message states:

[$injector:unpr] Unknown provider: $ionicScrollDelegateProvider <- $ionicScrollDelegate

It seems that the issue lies in injecting the $ionicScrollDelegate into the test. I have tried multiple approaches without success, and I am unsure which attempt is causing the problem.

Furthermore, I have confirmed that my karma.conf.js file includes the necessary libraries such as ionic.bundle.js and angular-mocks.js.

While I can successfully unit test components that do not involve $ionic dependencies, I am encountering difficulty when trying to test anything related to $ionic functionalities.

javascript angularjs unit-testing ionic-framework

Answer 1

Answer №1

When instantiating your controller with Angular, it's crucial to include all the necessary parameters. By specifying these parameters, you're informing Angular that these dependencies are essential for the controller to function properly.

My recommendation is to create mock representations of these dependencies and inject them when initializing the controller. These injected objects don't need to be the actual services during unit testing. Jasmine allows you to create spy objects for this purpose, enabling you to validate the unit's behavior.

(function() {
'use strict';

    var scope, controller, filter, ionicScrollDelegate;

    describe('timeInOutController', function () {

        beforeEach(module('common.directives.kmDateToday'));

        beforeEach(inject(function ($rootScope, $controller, $filter) {
            scope = $rootScope.$new();
            filter = $filter;

            // func1 and func2 are functions that will be created as spies on ionicScrollDelegate
            ionicScrollDelegate = jasmine.createSpyObj('ionicScrollDelegate', ['func1', 'func2']
            controller = $controller('timeInOutController', {
                $scope: scope,
                $filter: filter,
                $ionicScrollDelegate: ionicScrollDelegate
            });
        }));

        describe('#date setting', function(){

            ...

        });
    });
})();

For more information on spies, refer to jasmine's documentation

Answer 2

When instantiating your controller with Angular, it's crucial to include all the necessary parameters. By specifying these parameters, you're informing Angular that these dependencies are essential for the controller to function properly.

My recommendation is to create mock representations of these dependencies and inject them when initializing the controller. These injected objects don't need to be the actual services during unit testing. Jasmine allows you to create spy objects for this purpose, enabling you to validate the unit's behavior.

(function() {
'use strict';

    var scope, controller, filter, ionicScrollDelegate;

    describe('timeInOutController', function () {

        beforeEach(module('common.directives.kmDateToday'));

        beforeEach(inject(function ($rootScope, $controller, $filter) {
            scope = $rootScope.$new();
            filter = $filter;

            // func1 and func2 are functions that will be created as spies on ionicScrollDelegate
            ionicScrollDelegate = jasmine.createSpyObj('ionicScrollDelegate', ['func1', 'func2']
            controller = $controller('timeInOutController', {
                $scope: scope,
                $filter: filter,
                $ionicScrollDelegate: ionicScrollDelegate
            });
        }));

        describe('#date setting', function(){

            ...

        });
    });
})();

For more information on spies, refer to jasmine's documentation

Answer 3

Answer №2

In order to properly test your controller, it's essential to create mock objects for all the dependencies it relies on.

Consider the following controller as an example:

angular.module('app.module', [])
    .controller('Ctrl', function($scope, $ionicLoading) {
        $ionicLoading.show();
    });

As seen in this controller, the $ionicLoading service is being utilized. Therefore, to effectively test this controller, you must mock this object and specify the methods that are used within the controller:

describe('Test', function() {
     // Mocks
     var $scope, ionicLoadingMock;
     var ctrl;
     beforeEach(module('app.module'));
     beforeEach(function() {
         // Create $ionicLoading mock with `show` method
         ionicLoadingMock = jasmine.createSpyObj('ionicLoading', ['show']);
         inject(function($rootScope, $controller) {
             $scope = $rootScope.$new();
             ctrl = $controller('Ctrl', {
                 $scope: $scope,
                 $ionicLoading: ionicLoadingMock
             });
         });
     });
     // Your test goes here
     it('should init controller for testing', function() {
         expect(true).toBe(true);
     });
});

Answer 4

In order to properly test your controller, it's essential to create mock objects for all the dependencies it relies on.

Consider the following controller as an example:

angular.module('app.module', [])
    .controller('Ctrl', function($scope, $ionicLoading) {
        $ionicLoading.show();
    });

As seen in this controller, the $ionicLoading service is being utilized. Therefore, to effectively test this controller, you must mock this object and specify the methods that are used within the controller:

describe('Test', function() {
     // Mocks
     var $scope, ionicLoadingMock;
     var ctrl;
     beforeEach(module('app.module'));
     beforeEach(function() {
         // Create $ionicLoading mock with `show` method
         ionicLoadingMock = jasmine.createSpyObj('ionicLoading', ['show']);
         inject(function($rootScope, $controller) {
             $scope = $rootScope.$new();
             ctrl = $controller('Ctrl', {
                 $scope: $scope,
                 $ionicLoading: ionicLoadingMock
             });
         });
     });
     // Your test goes here
     it('should init controller for testing', function() {
         expect(true).toBe(true);
     });
});

Testing the Angular/Ionic project through unit tests

Answer №1

Answer №2

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