§Writing functional tests

§Testing a template

As a template is a standard Scala function, you can execute it from a test and check the result:

@Test
public void renderTemplate() {
  Content html = views.html.index.render("Coco");
  assertThat(contentType(html)).isEqualTo("text/html");
  assertThat(contentAsString(html)).contains("Coco");
}

You can find the complete list of the test helpers in the Helper class API documentation.

§Testing your controllers

You can also retrieve an action reference from the reverse router, such as controllers.routes.ref.Application.index. You can then invoke it:

@Test
public void callIndex() {
    Result result = callAction(
      controllers.routes.ref.Application.index("Kiki")
    );
    assertThat(status(result)).isEqualTo(OK);
    assertThat(contentType(result)).isEqualTo("text/html");
    assertThat(charset(result)).isEqualTo("utf-8");
    assertThat(contentAsString(result)).contains("Hello Kiki");
}

§Testing the router

Instead of calling the Action yourself, you can let the Router do it:

@Test
public void badRoute() {
  Result result = routeAndCall(fakeRequest(GET, "/xx/Kiki"));
  assertThat(result).isNull();
}

§Starting a real HTTP server

Sometimes you want to test the real HTTP stack from with your test. You can do this by starting a test server:

@Test
public void testInServer() {
  running(testServer(3333), new Runnable() {
      public void run() {
         assertThat(
           WS.url("http://localhost:3333").get().get().getStatus()
         ).isEqualTo(OK);
      }
  });
}

§Testing from within a web browser

If you want to test your application from with a Web browser, you can use Selenium WebDriver. Play will start the WebDriver for you, and wrap it in the convenient API provided by FluentLenium.

@Test
public void runInBrowser() {
    running(testServer(3333), HTMLUNIT, new Callback<TestBrowser>() {
        public void invoke(TestBrowser browser) {
           browser.goTo("http://localhost:3333"); 
           assertThat(browser.$("#title").getTexts().get(0)).isEqualTo("Hello Guest");
           browser.$("a").click();
           assertThat(browser.url()).isEqualTo("http://localhost:3333/Coco");
           assertThat(browser.$("#title", 0).getText()).isEqualTo("Hello Coco");
        }
    });
}