feat(tabs): adds e2e tests for tabs (#650)

closes #549

e2e/components/tabs/tabs.e2e.ts

@@ -0,0 +1,97 @@
+import ElementArrayFinder = protractor.ElementArrayFinder;
+import ElementFinder = protractor.ElementFinder;
+
+describe('tabs', () => {
+  describe('basic behavior', () => {
+    let tabGroup: ElementFinder;
+    let tabLabels: ElementArrayFinder;
+    let tabBodies: ElementArrayFinder;
+
+    beforeEach(() => {
+      browser.get('/tabs');
+      tabGroup = element(by.css('md-tab-group'));
+      tabLabels = element.all(by.css('.md-tab-label'));
+      tabBodies = element.all(by.css('.md-tab-body'));
+    });
+
+    it('should change tabs when the label is clicked', () => {
+      tabLabels.get(1).click();
+      expect(getActiveStates(tabLabels)).toEqual([false, true, false]);
+      expect(getActiveStates(tabBodies)).toEqual([false, true, false]);
+
+      tabLabels.get(0).click();
+      expect(getActiveStates(tabLabels)).toEqual([true, false, false]);
+      expect(getActiveStates(tabBodies)).toEqual([true, false, false]);
+    });
+
+    it('should change focus with keyboard interaction', () => {
+      tabLabels.get(0).click();
+      expect(getFocusStates(tabLabels)).toEqual([true, false, false]);
+
+      pressKey(protractor.Key.RIGHT);
+      expect(getFocusStates(tabLabels)).toEqual([false, true, false]);
+
+      pressKey(protractor.Key.RIGHT);
+      expect(getFocusStates(tabLabels)).toEqual([false, false, true]);
+
+      pressKey(protractor.Key.RIGHT);
+      expect(getFocusStates(tabLabels)).toEqual([false, false, true]);
+
+      pressKey(protractor.Key.LEFT);
+      expect(getFocusStates(tabLabels)).toEqual([false, true, false]);
+
+      pressKey(protractor.Key.LEFT);
+      expect(getFocusStates(tabLabels)).toEqual([true, false, false]);
+
+      pressKey(protractor.Key.LEFT);
+      expect(getFocusStates(tabLabels)).toEqual([true, false, false]);
+    });
+  });
+});
+
+/**
+ * A helper function to perform the sendKey action
+ * @param key
+ */
+function pressKey(key: string) {
+  browser.actions().sendKeys(key).perform();
+}
+
+/**
+ * Returns an array of true/false that represents the focus states of the provided elements
+ * @param elements
+ * @returns {webdriver.promise.Promise<Promise<boolean>[]>|webdriver.promise.Promise<T[]>}
+ */
+function getFocusStates(elements: ElementArrayFinder) {
+  return elements.map(element => {
+    return element.getText().then(elementText => {
+      return browser.driver.switchTo().activeElement().getText().then(activeText => {
+        return activeText === elementText;
+      });
+    });
+  });
+}
+
+/**
+ * Returns an array of true/false that represents the active states for the provided elements
+ * @param elements
+ * @returns {webdriver.promise.Promise<Promise<boolean>[]>|webdriver.promise.Promise<T[]>}
+ */
+function getActiveStates(elements: ElementArrayFinder) {
+  return getClassStates(elements, 'md-active');
+}
+
+/**
+ * Returns an array of true/false values that represents whether the provided className is on
+ * each element
+ * @param elements
+ * @param className
+ * @returns {webdriver.promise.Promise<Promise<boolean>[]>|webdriver.promise.Promise<T[]>}
+ */
+function getClassStates(elements: ElementArrayFinder, className: string) {
+  return elements.map(element => {
+    return element.getAttribute('class').then(classes => {
+      return classes.split(/ +/g).indexOf(className) >= 0;
+    });
+  });
+}

src/components/tabs/tab-group.html

@@ -1,7 +1,5 @@
 <div class="md-tab-header" role="tablist"
-     (keydown.arrowRight)="focusNextTab()"
-     (keydown.arrowLeft)="focusPreviousTab()"
-     (keydown.enter)="selectedIndex = focusIndex">
+     (keydown)="handleKeydown($event)">
   <div class="md-tab-label" role="tab" md-tab-label-wrapper
        *ngFor="let tab of _tabs; let i = index"
        [id]="_getTabLabelId(i)"
@@ -16,10 +14,13 @@
 </div>
 <div class="md-tab-body-wrapper">
   <div class="md-tab-body"
-       *ngFor="let tab of tabs; let i = index"
-       [id]="getTabContentId(i)"
+       role="tabpanel"
+       *ngFor="let tab of _tabs; let i = index"
+       [id]="_getTabContentId(i)"
        [class.md-active]="selectedIndex == i"
-       [attr.aria-labelledby]="getTabLabelId(i)">
-    <template role="tabpanel" [portalHost]="tab.content" [ngIf]="selectedIndex == i"></template>
+       [attr.aria-labelledby]="_getTabLabelId(i)">
+    <template [ngIf]="selectedIndex == i">
+      <template [portalHost]="tab.content"></template>
+    </template>
   </div>
 </div>

src/components/tabs/tabs.ts

@@ -19,6 +19,14 @@ import {MdInkBar} from './ink-bar';
 import {Observable} from 'rxjs/Observable';
 import 'rxjs/add/operator/map';
 
+// Due to a bug in the ChromeDriver, Angular 2 keyboard events are not triggered by `sendKeys`
+// during E2E tests when using dot notation such as `(keydown.rightArrow)`. To get around this,
+// we are temporarily using a single (keydown) handler.
+// See: https://github.com/angular/angular/issues/9419
+const RIGHT_ARROW = 39;
+const LEFT_ARROW = 37;
+const ENTER = 13;
+
 /** Used to generate unique ID's for each tab component */
 let nextId = 0;
 
@@ -159,6 +167,20 @@ export class MdTabGroup {
     return `md-tab-content-${this._groupId}-${i}`;
   }
 
+  handleKeydown(event: KeyboardEvent) {
+    switch (event.keyCode) {
+      case RIGHT_ARROW:
+        this.focusNextTab();
+        break;
+      case LEFT_ARROW:
+        this.focusPreviousTab();
+        break;
+      case ENTER:
+        this.selectedIndex = this.focusIndex;
+        break;
+    }
+  }
+
   /** Increment the focus index by 1; prevent going over the number of tabs */
   focusNextTab(): void {
     if (this._labelWrappers && this.focusIndex < this._labelWrappers.length - 1) {

src/e2e-app/e2e-app/e2e-app.html

@@ -1,3 +1,4 @@
 <a md-list-item [routerLink]="['button']">Button</a>
+<a md-list-item [routerLink]="['tabs']">Tabs</a>
 
 <router-outlet></router-outlet>

src/e2e-app/e2e-app/e2e-app.ts

@@ -1,14 +1,6 @@
 import {Component} from '@angular/core';
 import {ROUTER_DIRECTIVES} from '@angular/router';
 
-import {Dir} from '@angular2-material/core/rtl/dir';
-import {MdButton} from '@angular2-material/button/button';
-import {MD_SIDENAV_DIRECTIVES} from '@angular2-material/sidenav/sidenav';
-import {MD_LIST_DIRECTIVES} from '@angular2-material/list/list';
-import {MdIcon} from '@angular2-material/icon/icon';
-import {MdToolbar} from '@angular2-material/toolbar/toolbar';
-
-
 @Component({
   selector: 'home',
   template: `
@@ -24,12 +16,6 @@ export class Home {}
   templateUrl: 'e2e-app.html',
   directives: [
     ROUTER_DIRECTIVES,
-    Dir,
-    MdButton,
-    MdIcon,
-    MD_SIDENAV_DIRECTIVES,
-    MD_LIST_DIRECTIVES,
-    MdToolbar
   ],
   pipes: []
 })

src/e2e-app/e2e-app/routes.ts

@@ -1,11 +1,13 @@
 import {provideRouter, RouterConfig} from '@angular/router';
 import {Home} from './e2e-app';
 import {ButtonE2E} from '../button/button-e2e';
+import {BasicTabs} from '../tabs/tabs-e2e';
 
 
 export const routes: RouterConfig = [
   {path: '', component: Home},
   {path: 'button', component: ButtonE2E},
+  {path: 'tabs', component: BasicTabs},
 ];
 
 export const E2E_APP_ROUTE_PROVIDER = provideRouter(routes);

src/e2e-app/tabs/tabs-e2e.html

@@ -0,0 +1,16 @@
+<section>
+  <md-tab-group>
+    <md-tab>
+      <template md-tab-label>One</template>
+      <template md-tab-content>First tab's content</template>
+    </md-tab>
+    <md-tab>
+      <template md-tab-label>Two</template>
+      <template md-tab-content>Second tab's content</template>
+    </md-tab>
+    <md-tab>
+      <template md-tab-label>Three</template>
+      <template md-tab-content>Third tab's content</template>
+    </md-tab>
+  </md-tab-group>
+</section>

src/e2e-app/tabs/tabs-e2e.ts

@@ -0,0 +1,10 @@
+import {Component} from '@angular/core';
+import {MD_TABS_DIRECTIVES} from '@angular2-material/tabs/tabs';
+
+@Component({
+  moduleId: module.id,
+  selector: 'tabs-e2e',
+  templateUrl: 'tabs-e2e.html',
+  directives: [MD_TABS_DIRECTIVES]
+})
+export class BasicTabs {}