@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(""); }