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103 lines
4.7 KiB
Python
103 lines
4.7 KiB
Python
import unittest
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from contextlib import contextmanager
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from io import StringIO
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from unittest import mock
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from django.db import connection
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from django.db.backends.base.creation import BaseDatabaseCreation
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from django.db.utils import DatabaseError
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from django.test import SimpleTestCase
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try:
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import psycopg2 # NOQA
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except ImportError:
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pass
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else:
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from psycopg2 import errorcodes
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from django.db.backends.postgresql.creation import DatabaseCreation
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@unittest.skipUnless(connection.vendor == 'postgresql', 'PostgreSQL tests')
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class DatabaseCreationTests(SimpleTestCase):
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@contextmanager
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def changed_test_settings(self, **kwargs):
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settings = connection.settings_dict['TEST']
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saved_values = {}
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for name in kwargs:
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if name in settings:
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saved_values[name] = settings[name]
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for name, value in kwargs.items():
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settings[name] = value
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try:
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yield
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finally:
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for name in kwargs:
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if name in saved_values:
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settings[name] = saved_values[name]
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else:
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del settings[name]
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def check_sql_table_creation_suffix(self, settings, expected):
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with self.changed_test_settings(**settings):
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creation = DatabaseCreation(connection)
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suffix = creation.sql_table_creation_suffix()
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self.assertEqual(suffix, expected)
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def test_sql_table_creation_suffix_with_none_settings(self):
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settings = {'CHARSET': None, 'TEMPLATE': None}
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self.check_sql_table_creation_suffix(settings, "")
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def test_sql_table_creation_suffix_with_encoding(self):
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settings = {'CHARSET': 'UTF8'}
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self.check_sql_table_creation_suffix(settings, "WITH ENCODING 'UTF8'")
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def test_sql_table_creation_suffix_with_template(self):
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settings = {'TEMPLATE': 'template0'}
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self.check_sql_table_creation_suffix(settings, 'WITH TEMPLATE "template0"')
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def test_sql_table_creation_suffix_with_encoding_and_template(self):
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settings = {'CHARSET': 'UTF8', 'TEMPLATE': 'template0'}
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self.check_sql_table_creation_suffix(settings, '''WITH ENCODING 'UTF8' TEMPLATE "template0"''')
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def _execute_raise_database_already_exists(self, cursor, parameters, keepdb=False):
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error = DatabaseError('database %s already exists' % parameters['dbname'])
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error.pgcode = errorcodes.DUPLICATE_DATABASE
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raise DatabaseError() from error
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def _execute_raise_permission_denied(self, cursor, parameters, keepdb=False):
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error = DatabaseError('permission denied to create database')
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error.pgcode = errorcodes.INSUFFICIENT_PRIVILEGE
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raise DatabaseError() from error
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def patch_test_db_creation(self, execute_create_test_db):
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return mock.patch.object(BaseDatabaseCreation, '_execute_create_test_db', execute_create_test_db)
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@mock.patch('sys.stdout', new_callable=StringIO)
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@mock.patch('sys.stderr', new_callable=StringIO)
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def test_create_test_db(self, *mocked_objects):
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creation = DatabaseCreation(connection)
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# Simulate test database creation raising "database already exists"
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with self.patch_test_db_creation(self._execute_raise_database_already_exists):
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with mock.patch('builtins.input', return_value='no'):
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with self.assertRaises(SystemExit):
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# SystemExit is raised if the user answers "no" to the
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# prompt asking if it's okay to delete the test database.
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creation._create_test_db(verbosity=0, autoclobber=False, keepdb=False)
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# "Database already exists" error is ignored when keepdb is on
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creation._create_test_db(verbosity=0, autoclobber=False, keepdb=True)
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# Simulate test database creation raising unexpected error
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with self.patch_test_db_creation(self._execute_raise_permission_denied):
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with mock.patch.object(DatabaseCreation, '_database_exists', return_value=False):
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with self.assertRaises(SystemExit):
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creation._create_test_db(verbosity=0, autoclobber=False, keepdb=False)
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with self.assertRaises(SystemExit):
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creation._create_test_db(verbosity=0, autoclobber=False, keepdb=True)
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# Simulate test database creation raising "insufficient privileges".
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# An error shouldn't appear when keepdb is on and the database already
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# exists.
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with self.patch_test_db_creation(self._execute_raise_permission_denied):
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with mock.patch.object(DatabaseCreation, '_database_exists', return_value=True):
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creation._create_test_db(verbosity=0, autoclobber=False, keepdb=True)
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