def test_get_columns_and_aggregates(self):
# Simple column.
c_query = qe.PositionColumn()
columns, aggregates = qc.get_columns_and_aggregates(c_query)
self.assertEqual((1, 0), (len(columns), len(aggregates)))
self.assertFalse(qc.is_aggregate(c_query))
# Multiple columns.
c_query = qc.EvalAnd(qe.PositionColumn(), qe.DateColumn())
columns, aggregates = qc.get_columns_and_aggregates(c_query)
self.assertEqual((2, 0), (len(columns), len(aggregates)))
self.assertFalse(qc.is_aggregate(c_query))
# Simple aggregate.
c_query = qe.SumPosition([qe.PositionColumn()])
columns, aggregates = qc.get_columns_and_aggregates(c_query)
self.assertEqual((0, 1), (len(columns), len(aggregates)))
self.assertTrue(qc.is_aggregate(c_query))
# Multiple aggregates.
c_query = qc.EvalAnd(qe.First([qe.AccountColumn()]),
qe.Last([qe.AccountColumn()]))
columns, aggregates = qc.get_columns_and_aggregates(c_query)
self.assertEqual((0, 2), (len(columns), len(aggregates)))
self.assertTrue(qc.is_aggregate(c_query))
# Simple non-aggregate function.
c_query = qe.Length([qe.AccountColumn()])
columns, aggregates = qc.get_columns_and_aggregates(c_query)
self.assertEqual((1, 0), (len(columns), len(aggregates)))
self.assertFalse(qc.is_aggregate(c_query))
# Mix of column and aggregates (this is used to detect this illegal case).
c_query = qc.EvalAnd(qe.Length([qe.AccountColumn()]),
qe.SumPosition([qe.PositionColumn()]))
columns, aggregates = qc.get_columns_and_aggregates(c_query)
self.assertEqual((1, 1), (len(columns), len(aggregates)))
self.assertTrue(qc.is_aggregate(c_query))
def test_compile_EvalLast(self):
c_last = qe.Last([qc.EvalConstant(17.)])
self.assertEqual(float, c_last.dtype)