@Test public void testGetDuration() {

	// Arrange:
	final Animator mockAnimator = mock(Animator.class);
	final AnimatorWrapper wrapper = new AnimatorWrapper(mockAnimator);
	when(mockAnimator.getDuration()).thenReturn(100L);
	// Act + Assert:
	assertThat(wrapper.getDuration(), is(100L));
	verify(mockAnimator).getDuration();
}