docs(router): move examples into own file and add tests

Closes #4620

modules/angular2/examples/router/ts/reuse/reuse_spec.ts

@@ -0,0 +1,36 @@
+import {verifyNoBrowserErrors} from 'angular2/src/testing/e2e_util';
+import {Promise} from 'angular2/src/core/facade/async';
+
+function waitForElement(selector) {
+  var EC = (<any>protractor).ExpectedConditions;
+  // Waits for the element with id 'abc' to be present on the dom.
+  browser.wait(EC.presenceOf($(selector)), 20000);
+}
+
+describe('reuse example app', function() {
+
+  afterEach(verifyNoBrowserErrors);
+
+  var URL = 'angular2/examples/router/ts/reuse/';
+
+  it('should build a link which points to the detail page', function() {
+    browser.get(URL);
+    waitForElement('my-cmp');
+
+    element(by.css('#naomi-link')).click();
+    waitForElement('my-cmp');
+    expect(browser.getCurrentUrl()).toMatch(/\/naomi$/);
+
+    // type something into input
+    element(by.css('#message')).sendKeys('long time no see!');
+
+    // navigate to Brad
+    element(by.css('#brad-link')).click();
+    waitForElement('my-cmp');
+    expect(browser.getCurrentUrl()).toMatch(/\/brad$/);
+
+    // check that typed input is the same
+    expect(element(by.css('#message')).getAttribute('value')).toEqual('long time no see!');
+  });
+
+});