mirror of https://github.com/django/django.git
126 lines
5.3 KiB
Python
126 lines
5.3 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.core.exceptions import ImproperlyConfigured
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from django.db import DatabaseError, connection
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from django.db.backends.base.creation import BaseDatabaseCreation
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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(
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settings, '''WITH ENCODING 'UTF8' TEMPLATE "template0"'''
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)
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def test_sql_table_creation_raises_with_collation(self):
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settings = {"COLLATION": "test"}
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msg = (
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"PostgreSQL does not support collation setting at database "
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"creation time."
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)
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with self.assertRaisesMessage(ImproperlyConfigured, msg):
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self.check_sql_table_creation_suffix(settings, None)
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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(
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BaseDatabaseCreation, "_execute_create_test_db", execute_create_test_db
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)
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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(
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verbosity=0, autoclobber=False, keepdb=False
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)
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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(
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DatabaseCreation, "_database_exists", return_value=False
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):
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with self.assertRaises(SystemExit):
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creation._create_test_db(
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verbosity=0, autoclobber=False, keepdb=False
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)
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with self.assertRaises(SystemExit):
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creation._create_test_db(
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verbosity=0, autoclobber=False, keepdb=True
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)
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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(
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DatabaseCreation, "_database_exists", return_value=True
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):
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creation._create_test_db(verbosity=0, autoclobber=False, keepdb=True)
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