@Test
public void testClear() {

    presenter.clear();
    assertNull(presenter.acceptableColumns);
    verify(view, times(1)).clear();
    verify(view, times(0)).init(presenter);
    verify(view, times(0)).insert(anyInt(), any(DataColumnDefEditor.View.class), anyBoolean(), anyBoolean(), anyString());
    verify(view, times(0)).remove(anyInt());
}