    @Test
    public void shouldInformListenersOnClick() throws Exception {

        // given
        listeners.add(firstListenerMock);
        listeners.add(secondListenerMock);

        // when
        cut.onClick(null);

        // then
        Mockito.verify(firstListenerMock, Mockito.times(1)).onHeaderClicked(TEST_ROW_INDEX);
        Mockito.verify(secondListenerMock, Mockito.times(1)).onHeaderClicked(TEST_ROW_INDEX);
    }