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import os
import sys
from django.core.exceptions import ImproperlyConfigured
from django.db.backends.base.creation import BaseDatabaseCreation
from django.utils.six.moves import input
class DatabaseCreation(BaseDatabaseCreation):
def _get_test_db_name(self):
test_database_name = self.connection.settings_dict['TEST']['NAME']
if test_database_name and test_database_name != ':memory:':
if 'mode=memory' in test_database_name:
raise ImproperlyConfigured(
"Using `mode=memory` parameter in the database name is not allowed, "
"use `:memory:` instead."
)
return test_database_name
if self.connection.features.can_share_in_memory_db:
return 'file:memorydb_%s?mode=memory&cache=shared' % self.connection.alias
return ':memory:'
def _create_test_db(self, verbosity, autoclobber, keepdb=False):
test_database_name = self._get_test_db_name()
if keepdb:
return test_database_name
if not self.connection.is_in_memory_db(test_database_name):
# Erase the old test database
if verbosity >= 1:
print("Destroying old test database '%s'..." % self.connection.alias)
if os.access(test_database_name, os.F_OK):
if not autoclobber:
confirm = input(
"Type 'yes' if you would like to try deleting the test "
"database '%s', or 'no' to cancel: " % test_database_name
)
if autoclobber or confirm == 'yes':
try:
os.remove(test_database_name)
except Exception as e:
sys.stderr.write("Got an error deleting the old test database: %s\n" % e)
sys.exit(2)
else:
print("Tests cancelled.")
sys.exit(1)
return test_database_name
def _destroy_test_db(self, test_database_name, verbosity):
if test_database_name and not self.connection.is_in_memory_db(test_database_name):
# Remove the SQLite database file
os.remove(test_database_name)
def test_db_signature(self):
"""
Returns a tuple that uniquely identifies a test database.
This takes into account the special cases of ":memory:" and "" for
SQLite since the databases will be distinct despite having the same
TEST NAME. See http://www.sqlite.org/inmemorydb.html
"""
test_database_name = self._get_test_db_name()
sig = [self.connection.settings_dict['NAME']]
if self.connection.is_in_memory_db(test_database_name):
sig.append(self.connection.alias)
return tuple(sig)
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