@Test
  public void testGameOver() {
    actionCreator.gameOver();

    ArgumentCaptor<Action> actionCaptor = ArgumentCaptor.forClass(Action.class);
    verify(mockStore, times(1)).dispatch(actionCaptor.capture());

    List<Action> capturedActions = actionCaptor.getAllValues();

    Action.Navigate firstAction = (Action.Navigate) capturedActions.get(0);
    assertEquals(firstAction.getPage().getLayoutId(), R.layout.lose);
    assertEquals(firstAction.getAddToBackStack(), false);
  }