[ADF-1574] Info Drawer - Add a mechanism to know the current active tab (#2352)

* [ADF-1574] Info Drawer - Add a mechanism to know the current active tab

* Added a output event in adf-info-drawer component to get the currently active tab

* [ADF-1574] Info Drawer - Add a mechanism to know the current active tab

* Added a output event in adf-info-drawer component to get the currently active tab

* Added unit test file

* Updated info-drawer.md

ng2-components/ng2-alfresco-core/src/components/info-drawer/info-drawer.component.spec.ts

@@ -0,0 +1,72 @@
+/*!
+ * @license
+ * Copyright 2016 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { DebugElement } from '@angular/core';
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+import { MaterialModule } from '../../material.module';
+import { InfoDrawerLayoutComponent } from './info-drawer-layout.component';
+import { InfoDrawerComponent } from './info-drawer.component';
+
+declare let jasmine: any;
+
+describe('InfoDrawerComponent', () => {
+    let componentHandler: any;
+    let debugElement: DebugElement;
+    let element: HTMLElement;
+    let component: InfoDrawerComponent;
+    let fixture: ComponentFixture<InfoDrawerComponent>;
+
+    beforeEach(async(() => {
+        TestBed.configureTestingModule({
+            declarations: [
+                InfoDrawerComponent,
+                InfoDrawerLayoutComponent
+            ],
+            imports: [
+                MaterialModule
+            ]
+        }).compileComponents();
+    }));
+
+    beforeEach(() => {
+        fixture = TestBed.createComponent(InfoDrawerComponent);
+        component = fixture.componentInstance;
+        element = fixture.nativeElement;
+        debugElement = fixture.debugElement;
+        componentHandler = jasmine.createSpyObj('componentHandler', [
+            'upgradeAllRegistered',
+            'upgradeElement'
+        ]);
+        window['componentHandler'] = componentHandler;
+    });
+
+    it('should create instance of InfoDrawerComponent', () => {
+        expect(fixture.componentInstance instanceof InfoDrawerComponent).toBe(true, 'should create InfoDrawerComponent');
+    });
+
+    it('should define InfoDrawerTabLayout', () => {
+        let infoDrawerTabLayout = element.querySelector('adf-info-drawer-layout');
+        expect(infoDrawerTabLayout).toBeDefined();
+    });
+
+    it('should emit when tab is changed', () => {
+        let tabEmitSpy = spyOn(component.currentTab, 'emit');
+        let event = {index: 1, tab: {textLabel: 'DETAILS'}};
+        component.onTabChange(event);
+        expect(tabEmitSpy).toHaveBeenCalled();
+        expect(tabEmitSpy).toHaveBeenCalledWith('DETAILS');
+    });
+});