lient side unit test for id directive

client/core/src/directives/specs/id.spec.js

@@ -0,0 +1,34 @@
+describe('Directive vnId', () => {
+    let $scope;
+    let $element;
+    let compile;
+
+    beforeEach(() => {
+        angular.mock.module('client');
+    });
+
+    compile = _element => {
+        inject(($compile, $rootScope) => {
+            $scope = $rootScope.$new();
+            $element = angular.element(_element);
+            $compile($element)($scope);
+            $scope.$digest();
+        });
+    };
+
+    it(`should throw an error when there's no id defined`, () => {
+        let html = `<form vn-id=""></form>`;
+
+        expect(function errorExpected() {
+            compile(html);
+        }).toThrow(new Error(`vnId: Attribute can't be null`));
+    });
+
+    it(`should throw an error when these's no controller defined in $element[0]`, () => {
+        let html = `<div vn-id="1"></div>`;
+
+        expect(function errorExpected() {
+            compile(html);
+        }).toThrow(new Error(`vnId: Can't find controller for element '1'`));
+    });
+});