@Test
public void testViewTwoColumn() {

  TableSliceGroup group =
      StandardTableSliceGroup.create(
          table, table.categoricalColumn("who"), table.categoricalColumn("approval"));
  List<TableSlice> viewList = group.getSlices();
  int count = 0;
  for (TableSlice view : viewList) {
    count += view.rowCount();
  }
  assertEquals(table.rowCount(), count);
}