diff --git a/client/core/src/watcher/watcher.spec.js b/client/core/src/watcher/watcher.spec.js
new file mode 100644
index 000000000..d47a7523a
--- /dev/null
+++ b/client/core/src/watcher/watcher.spec.js
@@ -0,0 +1,69 @@
+import './watcher.js';
+
+describe('Component vnWatcher', () => {
+    let $componentController;
+    let $scope;
+    let $element;
+    let $state;
+    let $transitions;
+    let $httpBackend;
+    let vnApp;
+    let $translate;
+
+    beforeEach(() => {
+        angular.mock.module('client');
+    });
+
+    beforeEach(angular.mock.inject((_$componentController_, $rootScope, _$state_, _$transitions_, _$httpBackend_, _vnApp_, _$translate_) => {
+        $componentController = _$componentController_;
+        $scope = $rootScope.$new();
+        $element = angular.element('<div></div>');
+        $state = _$state_;
+        vnApp = _vnApp_;
+        $transitions = _$transitions_;
+        $httpBackend = _$httpBackend_;
+        $translate = _$translate_;
+    }));
+
+    describe('$onInit() ', () => {
+        it(`should call fetchData() if controllers get and url properties are defined`, () => {
+            let controller = $componentController('vnWatcher', {$scope, $element, $state, vnApp, $transitions, $httpBackend, $translate});
+            controller.get = () => {};
+            controller.url = 'test.com';
+            spyOn(controller, 'fetchData');
+            controller.$onInit();
+
+            expect(controller.fetchData).toHaveBeenCalledWith();
+        });
+
+        it(`should throw an error if $onInit is called without url defined`, () => {
+            let controller = $componentController('vnWatcher', {$scope, $element, $state, vnApp, $transitions, $httpBackend, $translate});
+            controller.get = () => {};
+
+            expect(function() {
+                controller.$onInit();
+            }).toThrow(new Error('Error: Parameter url ommitted'));
+        });
+    });
+
+    describe('$onChanges() ', () => {
+        it(`should call updateOriginalData() if controllers data is defined`, () => {
+            let controller = $componentController('vnWatcher', {$scope, $element, $state, vnApp, $transitions, $httpBackend, $translate});
+            controller.data = [];
+            spyOn(controller, 'updateOriginalData');
+            controller.$onChanges();
+
+            expect(controller.updateOriginalData).toHaveBeenCalledWith();
+        });
+    });
+
+    describe('$onDestroy() ', () => {
+        it(`should allways call deregisterCallback()`, () => {
+            let controller = $componentController('vnWatcher', {$scope, $element, $state, vnApp, $transitions, $httpBackend, $translate});
+            spyOn(controller, 'deregisterCallback');
+            controller.$onDestroy();
+
+            expect(controller.deregisterCallback).toHaveBeenCalledWith();
+        });
+    });
+});