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# -*- coding: utf-8 -*-
import importlib.util
from io import StringIO
from unittest.mock import MagicMock, Mock, PropertyMock, call, patch
from django.core.management import CommandError, call_command
from django.test import TestCase
from django.test.utils import override_settings
# Database testing configurations
UNKOWN_ENGINE = {
"default": {
"ENGINE": "django.db.backends.unknown",
"NAME": "unknown",
}
}
NO_TEST_NAME = {
"default": {
"ENGINE": "django.db.backends.mysql",
"NAME": "test",
"TEST": {
"NAME": "",
},
}
}
SQLITE = {
"default": {
"ENGINE": "django.db.backends.sqlite3",
"NAME": "db.sqlite3",
}
}
MYSQL_HOST_PORT = {
"default": {
"ENGINE": "django.db.backends.mysql",
"NAME": "test",
"USER": "test",
"PASSWORD": "test",
"HOST": "localhost",
"PORT": "3306",
},
}
MYSQL_SOCKET = {
"default": {
"ENGINE": "django.db.backends.mysql",
"NAME": "test",
"USER": "test",
"PASSWORD": "test",
"HOST": "/var/run/mysqld/mysql.sock",
},
}
POSTGRES = {
"default": {
"ENGINE": "django.db.backends.postgresql_psycopg2",
"NAME": "test",
"USER": "test",
"PASSWORD": "test",
"PORT": "5432",
"HOST": "localhost",
},
}
class DropTestDatabaseExceptionsTests(TestCase):
"""Test for drop_test_database command."""
def test_should_raise_CommandError_if_database_is_unknown(self):
with self.assertRaisesRegex(CommandError, "Unknown database unknown"):
call_command("drop_test_database", "--database=unknown")
@override_settings(DATABASES=UNKOWN_ENGINE)
@patch("django_extensions.management.commands.drop_test_database.input")
def test_should_raise_CommandError_if_unknown_database_engine(self, m_input):
m_input.return_value = "yes"
with self.assertRaisesRegex(
CommandError, "Unknown database engine django.db.backends.unknown"
):
call_command("drop_test_database")
@override_settings(DATABASES=NO_TEST_NAME)
def test_should_raise_CommandError_if_test_database_name_is_empty(self):
with self.assertRaisesRegex(
CommandError,
"You need to specify DATABASE_NAME in your Django settings file.",
):
call_command("drop_test_database")
class DropTestDatabaseTests(TestCase):
"""Test for drop_test_database command."""
@patch("sys.stdout", new_callable=StringIO)
@patch("django_extensions.management.commands.drop_test_database.input")
def test_should_raise_CommandError_if_database_is_unknown(self, m_input, m_stdout):
m_input.return_value = "no"
call_command("drop_test_database")
self.assertEqual("Reset cancelled.\n", m_stdout.getvalue())
@override_settings(DATABASES=SQLITE)
@patch("sys.stdout", new_callable=StringIO)
@patch("os.path.isfile")
@patch("os.unlink")
def test_sqlite3_should_unlink_primary_test_database(
self, m_unlink, m_isfile, m_stdout
):
# Indicate that no clone databases exist
m_isfile.side_effect = (True, False)
call_command("drop_test_database", "--noinput", verbosity=2)
with self.subTest("Should check for test database names until failure"):
self.assertListEqual(
m_isfile.call_args_list,
# See production code comments regarding double dots
[call("test_db.sqlite3"), call("test_db_1..sqlite3")],
)
with self.subTest("Should unlink only primary test database"):
self.assertListEqual(
m_unlink.call_args_list,
[call("test_db.sqlite3")],
)
with self.subTest("Should report successful message"):
self.assertIn("Reset successful.", m_stdout.getvalue())
@override_settings(DATABASES=SQLITE)
@patch("os.path.isfile")
@patch("os.unlink")
def test_sqlite3_should_unlink_all_existing_clone_databases(
self, m_unlink, m_isfile
):
"""Test cloned test databases created via 'manage.py test --parallel'."""
# Indicate that clone databases exist up to test_db_2.sqlite3
m_isfile.side_effect = (True, True, True, False)
call_command("drop_test_database", "--noinput")
with self.subTest("Should check for test database names until failure"):
self.assertListEqual(
m_isfile.call_args_list,
[
call("test_db.sqlite3"),
# See production code comments regarding double dots
call("test_db_1..sqlite3"),
call("test_db_2..sqlite3"),
call("test_db_3..sqlite3"),
],
)
with self.subTest("Should unlink all existing test databases"):
self.assertListEqual(
m_unlink.call_args_list,
[
call("test_db.sqlite3"),
# See production code comments regarding double dots
call("test_db_1..sqlite3"),
call("test_db_2..sqlite3"),
],
)
@override_settings(DATABASES=SQLITE)
@patch("sys.stdout", new_callable=StringIO)
@patch("os.path.isfile")
@patch("os.unlink")
def test_sqlite3_should_not_print_Reset_successful_when_OSError_exception(
self, m_unlink, m_isfile, m_stdout
):
m_isfile.return_value = True
m_unlink.side_effect = OSError
call_command("drop_test_database", "--noinput", verbosity=2)
self.assertNotIn("Reset successful.", m_stdout.getvalue())
@override_settings(DATABASES=MYSQL_HOST_PORT)
@patch("sys.stdout", new_callable=StringIO)
def test_mysql_should_drop_database_with_host_and_port(self, m_stdout):
m_database = MagicMock()
m_database.__spec__ = Mock()
# Indicate that no clone databases exist
# DROP queries return None while SELECT queries return a row count
m_database.connect.return_value.cursor.return_value.execute.side_effect = (
1,
None,
0,
)
with patch.dict("sys.modules", MySQLdb=m_database):
call_command("drop_test_database", "--noinput", verbosity=2)
with self.subTest(
"Should check for and remove test database names until failure"
):
exists_query = (
"SELECT SCHEMA_NAME FROM INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME="
)
self.assertListEqual(
m_database.connect.return_value.cursor.return_value.execute.call_args_list,
[
call(exists_query + "'test_test';"),
call("DROP DATABASE IF EXISTS `test_test`"),
call(exists_query + "'test_test_1';"),
],
)
with self.subTest("Should report successful message"):
self.assertIn("Reset successful.", m_stdout.getvalue())
@override_settings(DATABASES=MYSQL_SOCKET)
@patch("sys.stdout", new_callable=StringIO)
def test_mysql_should_drop_database_with_unix_socket(self, m_stdout):
m_database = MagicMock()
m_database.__spec__ = Mock()
# Indicate that no clone databases exist
# DROP queries return None while SELECT queries return a row count
m_database.connect.return_value.cursor.return_value.execute.side_effect = (
1,
None,
0,
)
with patch.dict("sys.modules", MySQLdb=m_database):
call_command("drop_test_database", "--noinput", verbosity=2)
with self.subTest(
"Should check for and remove test database names until failure"
):
exists_query = (
"SELECT SCHEMA_NAME FROM INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME="
)
self.assertListEqual(
m_database.connect.return_value.cursor.return_value.execute.call_args_list,
[
call(exists_query + "'test_test';"),
call("DROP DATABASE IF EXISTS `test_test`"),
call(exists_query + "'test_test_1';"),
],
)
with self.subTest("Should report successful message"):
self.assertIn("Reset successful.", m_stdout.getvalue())
@override_settings(DATABASES=MYSQL_HOST_PORT)
def test_mysql_should_drop_all_existing_clone_databases(self):
"""Test cloned test databases created via 'manage.py test --parallel'."""
m_database = MagicMock()
m_database.__spec__ = Mock()
# Indicate that clone databases exist up to test_test_2
# DROP queries return None while SELECT queries return a row count
m_database.connect.return_value.cursor.return_value.execute.side_effect = (
1,
None,
1,
None,
1,
None,
0,
)
with patch.dict("sys.modules", MySQLdb=m_database):
call_command("drop_test_database", "--noinput")
exists_query = (
"SELECT SCHEMA_NAME FROM INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME="
)
self.assertListEqual(
m_database.connect.return_value.cursor.return_value.execute.call_args_list,
[
call(exists_query + "'test_test';"),
call("DROP DATABASE IF EXISTS `test_test`"),
call(exists_query + "'test_test_1';"),
call("DROP DATABASE IF EXISTS `test_test_1`"),
call(exists_query + "'test_test_2';"),
call("DROP DATABASE IF EXISTS `test_test_2`"),
call(exists_query + "'test_test_3';"),
],
)
@override_settings(DATABASES=POSTGRES)
@patch("sys.stdout", new_callable=StringIO)
def test_postgresql_should_drop_database(self, m_stdout):
m_database = MagicMock()
m_database.__spec__ = Mock()
m_cursor = Mock()
m_database.connect.return_value.cursor.return_value = m_cursor
# Indicate that no clone databases exist
type(m_cursor).rowcount = PropertyMock(side_effect=(1, 0))
mock_kwargs = {"psycopg2": m_database}
has_psycopg3 = importlib.util.find_spec("psycopg") is not None
if has_psycopg3:
mock_kwargs = {"psycopg": m_database}
with patch.dict("sys.modules", **mock_kwargs):
call_command("drop_test_database", "--noinput", verbosity=2)
with self.subTest(
"Should check for and remove test database names until failure"
):
exists_query = "SELECT datname FROM pg_catalog.pg_database WHERE datname="
self.assertListEqual(
m_cursor.execute.call_args_list,
[
call(exists_query + "'test_test';"),
call('DROP DATABASE IF EXISTS "test_test";'),
call(exists_query + "'test_test_1';"),
],
)
with self.subTest("Should report successful message"):
self.assertIn("Reset successful.", m_stdout.getvalue())
@override_settings(DATABASES=POSTGRES)
def test_postgresql_should_drop_all_existing_cloned_databases(self):
"""Test cloned test databases created via 'manage.py test --parallel'."""
m_database = MagicMock()
m_database.__spec__ = Mock()
m_cursor = Mock()
m_database.connect.return_value.cursor.return_value = m_cursor
# Indicate that clone databases exist up to test_test_2
type(m_cursor).rowcount = PropertyMock(side_effect=(1, 1, 1, 0))
mock_kwargs = {"psycopg2": m_database}
has_psycopg3 = importlib.util.find_spec("psycopg") is not None
if has_psycopg3:
mock_kwargs = {"psycopg": m_database}
with patch.dict("sys.modules", **mock_kwargs):
call_command("drop_test_database", "--noinput")
exists_query = "SELECT datname FROM pg_catalog.pg_database WHERE datname="
self.assertListEqual(
m_cursor.execute.call_args_list,
[
call(exists_query + "'test_test';"),
call('DROP DATABASE IF EXISTS "test_test";'),
call(exists_query + "'test_test_1';"),
call('DROP DATABASE IF EXISTS "test_test_1";'),
call(exists_query + "'test_test_2';"),
call('DROP DATABASE IF EXISTS "test_test_2";'),
call(exists_query + "'test_test_3';"),
],
)
@override_settings(DATABASES=POSTGRES)
@patch("sys.stdout", new_callable=StringIO)
def test_postgresql_should_not_print_Reset_successful_when_exception_occured(
self, m_stdout
):
m_database = MagicMock()
m_database.__spec__ = Mock()
m_database.ProgrammingError = Exception
m_cursor = Mock()
m_cursor.execute.side_effect = m_database.ProgrammingError
m_database.connect.return_value.cursor.return_value = m_cursor
mock_kwargs = {"psycopg2": m_database}
has_psycopg3 = importlib.util.find_spec("psycopg") is not None
if has_psycopg3:
mock_kwargs = {"psycopg": m_database}
with patch.dict("sys.modules", **mock_kwargs):
call_command("drop_test_database", "--noinput", verbosity=2)
self.assertNotIn("Reset successful.", m_stdout.getvalue())
|
