[1.9.x] Refs #12118 -- Allowed "mode=memory" in SQLite test database names.

Backport of 3543fec3b739864c52de0a116dde3b0e5e885799 from master

1 files changed, 24 insertions, 0 deletions

diff --git a/tests/backends/tests.py b/tests/backends/tests.py
index 39a2654a77..6237e860fb 100644
--- a/tests/backends/tests.py
+++ b/tests/backends/tests.py
@@ -142,6 +142,30 @@ class SQLiteTests(TestCase):
                 models.Item.objects.all().aggregate,
                 **{'complex': aggregate('last_modified') + aggregate('last_modified')})
 
+    def test_memory_db_test_name(self):
+        """
+        A named in-memory db should be allowed where supported.
+        """
+        from django.db.backends.sqlite3.base import DatabaseWrapper
+        settings_dict = {
+            'TEST': {
+                'NAME': 'file:memorydb_test?mode=memory&cache=shared',
+            }
+        }
+        wrapper = DatabaseWrapper(settings_dict)
+        creation = wrapper.creation
+        if creation.connection.features.can_share_in_memory_db:
+            expected = creation.connection.settings_dict['TEST']['NAME']
+            self.assertEqual(creation._get_test_db_name(), expected)
+        else:
+            msg = (
+                "Using a shared memory database with `mode=memory` in the "
+                "database name is not supported in your environment, "
+                "use `:memory:` instead."
+            )
+            with self.assertRaisesMessage(ImproperlyConfigured, msg):
+                creation._get_test_db_name()
+
 
 @unittest.skipUnless(connection.vendor == 'postgresql', "Test only for PostgreSQL")
 class PostgreSQLTests(TestCase):