django/tests/migrations/test_base.py

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2013-08-23 11:07:43 +00:00
from django.test import TransactionTestCase
from django.db import connection
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class MigrationTestBase(TransactionTestCase):
"""
Contains an extended set of asserts for testing migrations and schema operations.
"""
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available_apps = ["migrations"]
def get_table_description(self, table):
with connection.cursor() as cursor:
return connection.introspection.get_table_description(cursor, table)
def assertTableExists(self, table):
with connection.cursor() as cursor:
self.assertIn(table, connection.introspection.get_table_list(cursor))
def assertTableNotExists(self, table):
with connection.cursor() as cursor:
self.assertNotIn(table, connection.introspection.get_table_list(cursor))
def assertColumnExists(self, table, column):
self.assertIn(column, [c.name for c in self.get_table_description(table)])
def assertColumnNotExists(self, table, column):
self.assertNotIn(column, [c.name for c in self.get_table_description(table)])
def assertColumnNull(self, table, column):
self.assertEqual([c.null_ok for c in self.get_table_description(table) if c.name == column][0], True)
def assertColumnNotNull(self, table, column):
self.assertEqual([c.null_ok for c in self.get_table_description(table) if c.name == column][0], False)
def assertIndexExists(self, table, columns, value=True):
with connection.cursor() as cursor:
self.assertEqual(
value,
any(
c["index"]
for c in connection.introspection.get_constraints(cursor, table).values()
if c['columns'] == list(columns)
),
)
def assertIndexNotExists(self, table, columns):
return self.assertIndexExists(table, columns, False)
def assertFKExists(self, table, columns, to, value=True):
with connection.cursor() as cursor:
self.assertEqual(
value,
any(
c["foreign_key"] == to
for c in connection.introspection.get_constraints(cursor, table).values()
if c['columns'] == list(columns)
),
)
def assertFKNotExists(self, table, columns, to, value=True):
return self.assertFKExists(table, columns, to, False)