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