### Question:
PopupDateEditCell extends AbstractPopupEditCell<Date, Date> { String getPattern() { return FORMATTER.getPattern(); } PopupDateEditCell(final boolean isReadOnly); @Override void render(Context context,
                       Date value,
                       SafeHtmlBuilder sb);  }### Answer:
@Test public void testGetPattern() { assertEquals(TEST_DATE_FORMAT, cell.getPattern()); }