test: closure integration test for change detection (#14691)

integration/hello_world__closure/e2e/app.e2e-spec.ts

@@ -3,6 +3,9 @@ import { browser, element, by } from 'protractor';
 describe('Hello world E2E Tests', function () {
   it('should display: Hello world!', function () {
     browser.get('');
-    expect(element(by.css('div')).getText()).toEqual('Hello world!');
+    const div = element(by.css('div'));
+    expect(div.getText()).toEqual('Hello world!');
+    element(by.css('input')).sendKeys('!');
+    expect(div.getText()).toEqual('Hello world!!');
   });
 });

integration/hello_world__closure/src/hello-world.component.ts

@@ -1,10 +1,12 @@
-import {Component, Injectable} from '@angular/core';
+import {Component} from '@angular/core';
 
 @Component({
   selector: 'hello-world-app',
-  template: '<div>Hello {{ name }}!</div>',
+  template: `
+    <div>Hello {{ name }}!</div>
+    <input type="text" [value]="name" (input)="name = $event.target.value"/>
+  `,
 })
-@Injectable()
 export class HelloWorldComponent {
   name: string = 'world';
 }