@Test
public void testClearButtons() {

    presenter.clearButtons();
    verify(view, times(1)).clearButtons();
    verify(view, times(0)).addButton(anyString(), anyString(), anyBoolean(), any(Command.class));
    verify(view, times(0)).add(any(IsWidget.class));
    verify(view, times(0)).init(presenter);
    verify(view, times(0)).clearView();
}