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# This file is part of python-sql. The COPYRIGHT file at the top level of
# this repository contains the full copyright notices and license terms.
import unittest
from sql import (
Asc, Column, Desc, Flavor, Literal, NullsFirst, NullsLast, Table)
class TestOrder(unittest.TestCase):
column = Column(Table('t'), 'c')
def test_asc(self):
self.assertEqual(str(Asc(self.column)), '"c" ASC')
def test_desc(self):
self.assertEqual(str(Desc(self.column)), '"c" DESC')
def test_nulls_first(self):
self.assertEqual(str(NullsFirst(self.column)), '"c" NULLS FIRST')
self.assertEqual(str(NullsFirst(Asc(self.column))),
'"c" ASC NULLS FIRST')
def test_nulls_last(self):
self.assertEqual(str(NullsLast(self.column)), '"c" NULLS LAST')
self.assertEqual(str(NullsLast(Asc(self.column))),
'"c" ASC NULLS LAST')
def test_no_null_ordering(self):
try:
Flavor.set(Flavor(null_ordering=False))
exp = NullsFirst(self.column)
self.assertEqual(str(exp),
'CASE WHEN ("c" IS NULL) THEN %s ELSE %s END ASC, "c"')
self.assertEqual(exp.params, (0, 1))
exp = NullsFirst(Desc(self.column))
self.assertEqual(str(exp),
'CASE WHEN ("c" IS NULL) THEN %s ELSE %s END ASC, "c" DESC')
self.assertEqual(exp.params, (0, 1))
exp = NullsLast(Literal(2))
self.assertEqual(str(exp),
'CASE WHEN (%s IS NULL) THEN %s ELSE %s END ASC, %s')
self.assertEqual(exp.params, (2, 1, 0, 2))
finally:
Flavor.set(Flavor())
def test_order_query(self):
table = Table('t')
column = Column(table, 'c')
query = table.select(column)
self.assertEqual(str(Asc(query)),
'(SELECT "a"."c" FROM "t" AS "a") ASC')
self.assertEqual(str(Desc(query)),
'(SELECT "a"."c" FROM "t" AS "a") DESC')
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