chore: rename modules/examples to modules/playground

The directory contains code authored in a style that makes it transpilable to dart. As such, these are not idiomatic examples of Angular 2 usage.

The main purpose of this directory is to enable experimentation with Angular within the angular/angular repository.

Closes #4342

Closes #4639

modules/playground/e2e_test/web_workers/kitchen_sink/kitchen_sink_spec.dart

@@ -0,0 +1,3 @@
+library playground.e2e_test.web_workers.kitchen_sink_spec;
+
+main() {}

modules/playground/e2e_test/web_workers/kitchen_sink/kitchen_sink_spec.ts

@@ -0,0 +1,47 @@
+import {verifyNoBrowserErrors} from 'angular2/src/testing/e2e_util';
+import {Promise} from 'angular2/src/core/facade/async';
+
+describe('WebWorkers Kitchen Sink', function() {
+  afterEach(() => {
+    verifyNoBrowserErrors();
+    browser.ignoreSynchronization = false;
+  });
+  var selector = "hello-app .greeting";
+  var URL = "playground/src/web_workers/kitchen_sink/index.html";
+
+  it('should greet', () => {
+    // This test can't wait for Angular 2 as Testability is not available when using WebWorker
+    browser.ignoreSynchronization = true;
+    browser.get(URL);
+
+    browser.wait(protractor.until.elementLocated(by.css(selector)), 15000);
+    expect(element.all(by.css(selector)).first().getText()).toEqual("hello world!");
+
+  });
+
+  it('should change greeting', () => {
+    // This test can't wait for Angular 2 as Testability is not available when using WebWorker
+    browser.ignoreSynchronization = true;
+    browser.get(URL);
+
+    browser.wait(protractor.until.elementLocated(by.css(selector)), 15000);
+    element(by.css("hello-app .changeButton")).click();
+    var elem = element(by.css(selector));
+    browser.wait(protractor.until.elementTextIs(elem, "howdy world!"), 5000);
+    expect(elem.getText()).toEqual("howdy world!");
+  });
+
+  it("should display correct key names", () => {
+    // This test can't wait for Angular 2 as Testability is not available when using WebWorker
+    browser.ignoreSynchronization = true;
+    browser.get(URL);
+    browser.wait(protractor.until.elementLocated(by.css(".sample-area")), 15000);
+
+    var area = element.all(by.css(".sample-area")).first();
+    expect(area.getText()).toEqual('(none)');
+
+    area.sendKeys('u');
+    browser.wait(protractor.until.elementTextIs(area, "U"), 5000);
+    expect(area.getText()).toEqual("U");
+  });
+});

modules/playground/e2e_test/web_workers/message_broker/message_broker_spec.dart

@@ -0,0 +1,3 @@
+library playground.e2e_test.message_bus;
+
+main() {}

modules/playground/e2e_test/web_workers/message_broker/message_broker_spec.ts

@@ -0,0 +1,39 @@
+import {verifyNoBrowserErrors} from "angular2/src/testing/e2e_util";
+import {PromiseWrapper} from "angular2/src/core/facade/async";
+
+var URL = 'playground/src/web_workers/message_broker/index.html';
+
+describe("MessageBroker", function() {
+
+  afterEach(() => {
+    verifyNoBrowserErrors();
+    browser.ignoreSynchronization = false;
+  });
+
+  it("should bootstrap", () => {
+    // This test can't wait for Angular 2 as Testability is not available when using WebWorker
+    browser.ignoreSynchronization = true;
+    browser.get(URL);
+    waitForBootstrap();
+    expect(element(by.css("app h1")).getText()).toEqual("WebWorker MessageBroker Test");
+  });
+
+  it("should echo messages", () => {
+    const VALUE = "Hi There";
+    // This test can't wait for Angular 2 as Testability is not available when using WebWorker
+    browser.ignoreSynchronization = true;
+    browser.get(URL);
+    waitForBootstrap();
+
+    var input = element.all(by.css("#echo_input")).first();
+    input.sendKeys(VALUE);
+    element(by.css("#send_echo")).click();
+    var area = element(by.css("#echo_result"));
+    browser.wait(protractor.until.elementTextIs(area, VALUE), 5000);
+    expect(area.getText()).toEqual(VALUE);
+  });
+});
+
+function waitForBootstrap(): void {
+  browser.wait(protractor.until.elementLocated(by.css("app h1")), 15000);
+}

modules/playground/e2e_test/web_workers/todo/todo_spec.dart

@@ -0,0 +1,3 @@
+library playground.e2e_test.web_workers.todo_spec;
+
+main() {}

modules/playground/e2e_test/web_workers/todo/todo_spec.ts

@@ -0,0 +1,25 @@
+import {verifyNoBrowserErrors} from 'angular2/src/testing/e2e_util';
+import {Promise} from 'angular2/src/core/facade/async';
+
+describe('WebWorkers Todo', function() {
+  afterEach(() => {
+    verifyNoBrowserErrors();
+    browser.ignoreSynchronization = false;
+  });
+
+  var URL = "playground/src/web_workers/todo/index.html";
+
+  it('should bootstrap', () => {
+    // This test can't wait for Angular 2 as Testability is not available when using WebWorker
+    browser.ignoreSynchronization = true;
+    browser.get(URL);
+
+    waitForBootstrap();
+    expect(element(by.css("#todoapp header")).getText()).toEqual("todos");
+  });
+
+});
+
+function waitForBootstrap(): void {
+  browser.wait(protractor.until.elementLocated(by.css("todo-app #todoapp")), 15000);
+}