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from unittest import skipUnless
from django.db import connection, connections
from django.test import TestCase
@skipUnless(connection.vendor == 'mysql', 'MySQL tests')
class ParsingTests(TestCase):
def test_parse_constraint_columns(self):
_parse_constraint_columns = connection.introspection._parse_constraint_columns
tests = (
('`height` >= 0', ['height'], ['height']),
('`cost` BETWEEN 1 AND 10', ['cost'], ['cost']),
('`ref1` > `ref2`', ['id', 'ref1', 'ref2'], ['ref1', 'ref2']),
(
'`start` IS NULL OR `end` IS NULL OR `start` < `end`',
['id', 'start', 'end'],
['start', 'end'],
),
('JSON_VALID(`json_field`)', ['json_field'], ['json_field']),
('CHAR_LENGTH(`name`) > 2', ['name'], ['name']),
("lower(`ref1`) != 'test'", ['id', 'owe', 'ref1'], ['ref1']),
("lower(`ref1`) != 'test'", ['id', 'lower', 'ref1'], ['ref1']),
("`name` LIKE 'test%'", ['name'], ['name']),
)
for check_clause, table_columns, expected_columns in tests:
with self.subTest(check_clause):
check_columns = _parse_constraint_columns(check_clause, table_columns)
self.assertEqual(list(check_columns), expected_columns)
@skipUnless(connection.vendor == 'mysql', 'MySQL tests')
class StorageEngineTests(TestCase):
databases = {'default', 'other'}
def test_get_storage_engine(self):
table_name = 'test_storage_engine'
create_sql = 'CREATE TABLE %s (id INTEGER) ENGINE = %%s' % table_name
drop_sql = 'DROP TABLE %s' % table_name
default_connection = connections['default']
other_connection = connections['other']
try:
with default_connection.cursor() as cursor:
cursor.execute(create_sql % 'InnoDB')
self.assertEqual(
default_connection.introspection.get_storage_engine(cursor, table_name),
'InnoDB',
)
with other_connection.cursor() as cursor:
cursor.execute(create_sql % 'MyISAM')
self.assertEqual(
other_connection.introspection.get_storage_engine(cursor, table_name),
'MyISAM',
)
finally:
with default_connection.cursor() as cursor:
cursor.execute(drop_sql)
with other_connection.cursor() as cursor:
cursor.execute(drop_sql)
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