Question

In an app based on the Play! Framework (2.0, Java) I want to mock a third party API when testing the controllers. I’ve picked Mockito for this because I couldn’t find out about any built-in mocking features in Play!

I have something like this:

@Test
public void someTest() {
  ThirdParty thirdParty = mock(ThirdParty.class);
  when(thirdParty.someUnwantedMethod()).thenReturn("foo");

  running(fakeApplication(), new Runnable() {
    public void run() {
      Result result = callAction(controllers.routes.ref.MyController.doImportantStuff());
      verify(thirdParty.someUnwantedMethod()); // Verify that method in mock/API is called
      assertThat(contentAsString(result)).contains("foo");
    }
  });
}

(the controller in turn calls “someUnwantedMethod()” on an instance of the ThirdParty class which should use the mock instead when testing)

How do I get my controller to pick up the mock?

Answer 1

1. Introduce a static setThirdParty method in MyController
2. In your test, before “callAction”, call MyController.setThirdParty(thirdParty)

There is nothing play-specific about this