@Test
  public void canCopySourceForActiveRow() {
    // Given: current editor is focused
    TargetContentsPresenter spyPresenter = spy(presenter);
    selectedTU = currentPageRows.get(0);
    spyPresenter.setStatesForTesting(selectedTU.getId(), 0, display);
    doNothing().when(spyPresenter).copySource(editor, selectedTU.getId());
    when(editor.isFocused()).thenReturn(true);
    when(display.getEditors()).thenReturn(Lists.newArrayList(editor));

    // When:
    spyPresenter.copySourceForActiveRow();

    // Then:
    verify(spyPresenter).copySource(editor, selectedTU.getId());
  }