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178 lines
7.6 KiB
Python
178 lines
7.6 KiB
Python
import copy
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from unittest import mock
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from django.db import DEFAULT_DB_ALIAS, connection, connections
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from django.db.backends.base.creation import (
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TEST_DATABASE_PREFIX, BaseDatabaseCreation,
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)
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from django.test import SimpleTestCase, TransactionTestCase
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from django.test.utils import override_settings
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from ..models import (
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CircularA, CircularB, Object, ObjectReference, ObjectSelfReference,
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)
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def get_connection_copy():
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# Get a copy of the default connection. (Can't use django.db.connection
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# because it'll modify the default connection itself.)
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test_connection = copy.copy(connections[DEFAULT_DB_ALIAS])
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test_connection.settings_dict = copy.deepcopy(
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connections[DEFAULT_DB_ALIAS].settings_dict
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)
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return test_connection
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class TestDbSignatureTests(SimpleTestCase):
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def test_default_name(self):
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# A test db name isn't set.
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prod_name = 'hodor'
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test_connection = get_connection_copy()
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test_connection.settings_dict['NAME'] = prod_name
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test_connection.settings_dict['TEST'] = {'NAME': None}
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signature = BaseDatabaseCreation(test_connection).test_db_signature()
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self.assertEqual(signature[3], TEST_DATABASE_PREFIX + prod_name)
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def test_custom_test_name(self):
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# A regular test db name is set.
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test_name = 'hodor'
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test_connection = get_connection_copy()
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test_connection.settings_dict['TEST'] = {'NAME': test_name}
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signature = BaseDatabaseCreation(test_connection).test_db_signature()
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self.assertEqual(signature[3], test_name)
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def test_custom_test_name_with_test_prefix(self):
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# A test db name prefixed with TEST_DATABASE_PREFIX is set.
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test_name = TEST_DATABASE_PREFIX + 'hodor'
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test_connection = get_connection_copy()
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test_connection.settings_dict['TEST'] = {'NAME': test_name}
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signature = BaseDatabaseCreation(test_connection).test_db_signature()
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self.assertEqual(signature[3], test_name)
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@override_settings(INSTALLED_APPS=['backends.base.app_unmigrated'])
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@mock.patch.object(connection, 'ensure_connection')
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@mock.patch.object(connection, 'prepare_database')
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@mock.patch('django.db.migrations.recorder.MigrationRecorder.has_table', return_value=False)
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@mock.patch('django.db.migrations.executor.MigrationExecutor.migrate')
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@mock.patch('django.core.management.commands.migrate.Command.sync_apps')
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class TestDbCreationTests(SimpleTestCase):
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available_apps = ['backends.base.app_unmigrated']
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def test_migrate_test_setting_false(self, mocked_sync_apps, mocked_migrate, *mocked_objects):
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test_connection = get_connection_copy()
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test_connection.settings_dict['TEST']['MIGRATE'] = False
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creation = test_connection.creation_class(test_connection)
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if connection.vendor == 'oracle':
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# Don't close connection on Oracle.
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creation.connection.close = mock.Mock()
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old_database_name = test_connection.settings_dict['NAME']
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try:
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with mock.patch.object(creation, '_create_test_db'):
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creation.create_test_db(verbosity=0, autoclobber=True, serialize=False)
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# Migrations don't run.
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mocked_migrate.assert_called()
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args, kwargs = mocked_migrate.call_args
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self.assertEqual(args, ([],))
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self.assertEqual(kwargs['plan'], [])
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# App is synced.
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mocked_sync_apps.assert_called()
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mocked_args, _ = mocked_sync_apps.call_args
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self.assertEqual(mocked_args[1], {'app_unmigrated'})
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finally:
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with mock.patch.object(creation, '_destroy_test_db'):
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creation.destroy_test_db(old_database_name, verbosity=0)
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def test_migrate_test_setting_true(self, mocked_sync_apps, mocked_migrate, *mocked_objects):
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test_connection = get_connection_copy()
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test_connection.settings_dict['TEST']['MIGRATE'] = True
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creation = test_connection.creation_class(test_connection)
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if connection.vendor == 'oracle':
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# Don't close connection on Oracle.
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creation.connection.close = mock.Mock()
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old_database_name = test_connection.settings_dict['NAME']
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try:
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with mock.patch.object(creation, '_create_test_db'):
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creation.create_test_db(verbosity=0, autoclobber=True, serialize=False)
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# Migrations run.
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mocked_migrate.assert_called()
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args, kwargs = mocked_migrate.call_args
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self.assertEqual(args, ([('app_unmigrated', '0001_initial')],))
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self.assertEqual(len(kwargs['plan']), 1)
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# App is not synced.
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mocked_sync_apps.assert_not_called()
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finally:
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with mock.patch.object(creation, '_destroy_test_db'):
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creation.destroy_test_db(old_database_name, verbosity=0)
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class TestDeserializeDbFromString(TransactionTestCase):
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available_apps = ['backends']
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def test_circular_reference(self):
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# deserialize_db_from_string() handles circular references.
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data = """
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[
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{
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"model": "backends.object",
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"pk": 1,
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"fields": {"obj_ref": 1, "related_objects": []}
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},
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{
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"model": "backends.objectreference",
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"pk": 1,
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"fields": {"obj": 1}
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}
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]
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"""
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connection.creation.deserialize_db_from_string(data)
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obj = Object.objects.get()
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obj_ref = ObjectReference.objects.get()
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self.assertEqual(obj.obj_ref, obj_ref)
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self.assertEqual(obj_ref.obj, obj)
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def test_self_reference(self):
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# serialize_db_to_string() and deserialize_db_from_string() handles
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# self references.
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obj_1 = ObjectSelfReference.objects.create(key='X')
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obj_2 = ObjectSelfReference.objects.create(key='Y', obj=obj_1)
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obj_1.obj = obj_2
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obj_1.save()
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# Serialize objects.
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with mock.patch('django.db.migrations.loader.MigrationLoader') as loader:
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# serialize_db_to_string() serializes only migrated apps, so mark
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# the backends app as migrated.
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loader_instance = loader.return_value
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loader_instance.migrated_apps = {'backends'}
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data = connection.creation.serialize_db_to_string()
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ObjectSelfReference.objects.all().delete()
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# Deserialize objects.
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connection.creation.deserialize_db_from_string(data)
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obj_1 = ObjectSelfReference.objects.get(key='X')
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obj_2 = ObjectSelfReference.objects.get(key='Y')
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self.assertEqual(obj_1.obj, obj_2)
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self.assertEqual(obj_2.obj, obj_1)
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def test_circular_reference_with_natural_key(self):
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# serialize_db_to_string() and deserialize_db_from_string() handles
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# circular references for models with natural keys.
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obj_a = CircularA.objects.create(key='A')
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obj_b = CircularB.objects.create(key='B', obj=obj_a)
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obj_a.obj = obj_b
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obj_a.save()
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# Serialize objects.
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with mock.patch('django.db.migrations.loader.MigrationLoader') as loader:
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# serialize_db_to_string() serializes only migrated apps, so mark
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# the backends app as migrated.
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loader_instance = loader.return_value
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loader_instance.migrated_apps = {'backends'}
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data = connection.creation.serialize_db_to_string()
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CircularA.objects.all().delete()
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CircularB.objects.all().delete()
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# Deserialize objects.
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connection.creation.deserialize_db_from_string(data)
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obj_a = CircularA.objects.get()
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obj_b = CircularB.objects.get()
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self.assertEqual(obj_a.obj, obj_b)
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self.assertEqual(obj_b.obj, obj_a)
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