@Test
public void testSingle() {

    GroupBy groupBy = GroupByParser.parse("name");
    assertSingleGroupBy(groupBy, "name", null, null);
    groupBy = GroupByParser.parse("name n");
    assertSingleGroupBy(groupBy, "name", "n", null);
    groupBy = GroupByParser.parse("t.name");
    assertSingleGroupBy(groupBy, "name", null, "t");
    groupBy = GroupByParser.parse("t.name n");
    assertSingleGroupBy(groupBy, "name", "n", "t");
}