diff --git a/client/core/src/multi-check/multi-check.js b/client/core/src/multi-check/multi-check.js
index ba3f7b79f..3447e9b46 100644
--- a/client/core/src/multi-check/multi-check.js
+++ b/client/core/src/multi-check/multi-check.js
@@ -13,19 +13,24 @@ export default class MultiCheck {
         this.type = {};
         this.showDropDown = false;
     }
+
     get models() {
         return this._models;
     }
+
     set models(value) {
         this._models = value;
     }
+
     get checkAll() {
         return this._checkAll;
     }
+
     set checkAll(value) {
         this._checkAll = value;
         this.switchChecks();
     }
+
     switchChecks() {
         if (this.models)
             this.models.forEach(
@@ -47,10 +52,12 @@ export default class MultiCheck {
                 }
             );
     }
+
     $onChanges() {
         this.type = {};
         this.checkAll = 0;
     }
+
     $doCheck() {
         if (this.type && this.type.id) {
             switch (this.type.id) {
@@ -68,6 +75,7 @@ export default class MultiCheck {
         }
     }
 }
+
 MultiCheck.$inject = [];
 
 module.component('vnMultiCheck', {
diff --git a/client/core/src/paging/paging.js b/client/core/src/paging/paging.js
index e04f9ee5e..02d1a7fc0 100644
--- a/client/core/src/paging/paging.js
+++ b/client/core/src/paging/paging.js
@@ -5,6 +5,7 @@ export default class Paging {
     get numPages() {
         return Math.ceil(this.numItems / this.numPerPage);
     }
+
     constructor($http, $scope) {
         this.$http = $http;
         this.$scope = $scope;
@@ -13,6 +14,7 @@ export default class Paging {
         this.numItems = 0;
         $scope.$watch('$ctrl.index.model.length', () => this.onModelUpdated());
     }
+
     $onChanges(changes) {
         if (!this.index) return;
         this.numPerPage = this.index.filter.size;
@@ -20,14 +22,15 @@ export default class Paging {
         if (changes.total)
             this.numItems = changes.total.currentValue;
     }
+
     onModelUpdated() {
         let index = this.index;
         let filter = index.filter;
 
-        if (filter.page >= this.numPages
-        && index.model.length >= this.numPerPage)
+        if (filter.page >= this.numPages && index.model.length >= this.numPerPage)
             this.numItems = filter.page * filter.size + 1;
     }
+
     onPageChange(page) {
         this.index.filter.page = page;
         if (typeof this.pageChange === 'undefined') {
@@ -37,6 +40,7 @@ export default class Paging {
         }
     }
 }
+
 Paging.$inject = ['$http', '$scope'];
 
 export const NAME = 'vnPaging';
@@ -49,4 +53,5 @@ export const COMPONENT = {
     },
     controller: Paging
 };
+
 module.component(NAME, COMPONENT);
diff --git a/client/core/src/paging/paging.spec.js b/client/core/src/paging/paging.spec.js
new file mode 100644
index 000000000..de13f183f
--- /dev/null
+++ b/client/core/src/paging/paging.spec.js
@@ -0,0 +1,72 @@
+import './paging.js';
+
+describe('Component vnPaging', () => {
+    let $componentController;
+    let $scope;
+    let $httpBackend;
+
+    beforeEach(() => {
+        angular.mock.module('client');
+    });
+
+    beforeEach(angular.mock.inject((_$componentController_, $rootScope, _$httpBackend_) => {
+        $componentController = _$componentController_;
+        $scope = $rootScope.$new();
+        $httpBackend = _$httpBackend_;
+    }));
+
+    describe('$onChanges()', () => {
+        it(`should define numberPage and currentPage based on index.filter properties`, () => {
+            let controller = $componentController('vnPaging', {$scope, $httpBackend});
+            controller.index = {filter: {size: 'something', page: 'something else'}};
+            controller.$onChanges({index: 'simpleChange', currentValue: 'current value', previousValue: 'previous value'});
+
+            expect(controller.numPerPage).toBe(controller.index.filter.size);
+            expect(controller.currentPage).toEqual(controller.index.filter.page);
+        });
+
+        it(`should define numItems based on changes.total.currentValue`, () => {
+            let controller = $componentController('vnPaging', {$scope, $httpBackend});
+            controller.index = {filter: {size: 'something', page: 'something else'}};
+            controller.$onChanges({total: {currentValue: 'current value'}});
+
+            expect(controller.numItems).toEqual('current value');
+        });
+    });
+
+    describe('onModelUpdated()', () => {
+        it(`should define controllers numItems as the result of page times size plus one`, () => {
+            let controller = $componentController('vnPaging', {$scope, $httpBackend});
+            controller.numPerPage = 2;
+            controller.index = {
+                filter: {size: 10, page: 10},
+                model: ['one mother..', 'another model..', 'last model..']
+            };
+            controller.onModelUpdated();
+
+            expect(controller.numItems).toBe(101);
+        });
+    });
+
+    describe('onPageChange()', () => {
+        it(`should call accept() since pageChange property is undefined`, () => {
+            let myIndex = {accept: () => {}, filter: {page: 0}};
+            let controller = $componentController('vnPaging', {$scope, $httpBackend}, {index: myIndex});
+            spyOn(controller.index, 'accept');
+            controller.onPageChange(100);
+
+            expect(controller.index.accept).toHaveBeenCalledWith();
+        });
+
+        it(`should call pageChange() since pageChange property isn't undefined`, () => {
+            let myIndex = {accept: () => {}, filter: {page: 0}};
+            let controller = $componentController('vnPaging', {$scope, $httpBackend}, {index: myIndex});
+            controller.pageChange = true;
+            spyOn(controller, 'pageChange');
+            controller.onPageChange(100);
+
+            expect(controller.pageChange).toHaveBeenCalledWith();
+        });
+    });
+});
+
diff --git a/client/core/src/watcher/watcher.js b/client/core/src/watcher/watcher.js
index 3ee1b5d4e..bf085db4e 100644
--- a/client/core/src/watcher/watcher.js
+++ b/client/core/src/watcher/watcher.js
@@ -24,6 +24,7 @@ export default class Watcher extends Component {
             transition => this.callback(transition));
         this.copyData();
     }
+
     $onInit() {
         if (this.get && this.url) {
             this.fetchData();
@@ -31,14 +32,17 @@ export default class Watcher extends Component {
             throw new Error('Error: Parameter url ommitted');
         }
     }
+
     $onChanges(changes) {
         if (this.data) {
             this.copyData();
         }
     }
+
     $onDestroy() {
         this.deregisterCallback();
     }
+
     fetchData() {
         let id = this.data[this.idField];
        // return new Promise((resolve, reject) => {
@@ -120,6 +124,7 @@ export default class Watcher extends Component {
             );
         });
     }
+
     writeData(json, resolve) {
         Object.keys(this.data).forEach(
             key => {
@@ -130,21 +135,25 @@ export default class Watcher extends Component {
         this.copyData();
         resolve(json);
     }
+
     noChanges(resolve) {
         this.vnApp.showMessage(
             this.$translate.instant('No changes to save')
         );
         resolve();
     }
+
     invalidForm(resolve) {
         this.vnApp.showMessage(
             this.$translate.instant('Some fields are invalid')
         );
         resolve();
     }
+
     copyData() {
         this.orgData = this.copyObject(this.data);
     }
+
     copyObject(data) {
         let copy = {};
         if (data) {
@@ -157,6 +166,7 @@ export default class Watcher extends Component {
         }
         return copy;
     }
+
     callback(transition) {
         let dataChanged = this.dataChanged();
         if (!this.state && dataChanged) {
@@ -167,10 +177,12 @@ export default class Watcher extends Component {
 
         return true;
     }
+
     dataChanged() {
         let newData = this.copyObject(this.data);
         return !isEqual(newData, this.orgData);
     }
+
     onConfirmResponse(response) {
         if (response === 'ACCEPT') {
             this.data = this.copyObject(this.orgData);
@@ -180,6 +192,7 @@ export default class Watcher extends Component {
         }
     }
 }
+
 Watcher.$inject = ['$element', '$scope', '$state', '$transitions', '$http', 'vnApp', '$translate'];
 
 module.component('vnWatcher', {