/usr/lib/python3/dist-packages/sql/tests/test_order.py is in python3-sql 0.9-1.
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#
# Copyright (c) 2011-2013, Cédric Krier
# Copyright (c) 2011-2013, B2CK
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#
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# modification, are permitted provided that the following conditions are met:
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# * Redistributions in binary form must reproduce the above copyright
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# * Neither the name of the <organization> nor the
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import unittest
from sql import Asc, Desc, NullsFirst, NullsLast, Column, Table, Literal
from sql import Flavor
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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