@Test
  public void testClear() throws Exception {
    screen.clear();

    verify(view).setIssueTitle("");
    ArgumentCaptor<SafeHtml> safeHtmlArgumentCaptor = ArgumentCaptor.forClass(SafeHtml.class);
    verify(view).setExplanation(safeHtmlArgumentCaptor.capture());
    assertEquals("", safeHtmlArgumentCaptor.getValue().asString());
    verify(view).hideLines();
    verify(view).setLines("");
  }