row.addCell(new TableCell(new DateValue(2011, 1, 4)));
row.addCell(new TableCell(new DateTimeValue(2011, 1, 4, 0, 0, 0, 0)));
row.addCell(new TableCell(222));
rows.add(row);
testData.addRows(rows);
JsonpRenderer r = new JsonpRenderer();
assertEquals(
"{\"cols\":[{\"id\":\"DateA\",\"label\":\"col0\",\"type\":\"date\",\"pattern\":\"\"},"
+ "{\"id\":\"DateTimeA\",\"label\":\"col1\",\"type\":\"datetime\",\"pattern\":\"\"},"