Refs #24121 -- Added __repr__() to BaseDatabaseWrapper, JoinPromoter, and SQLCompiler.

tests/backends/base/test_base.py

@@ -9,6 +9,13 @@ from ..models import Square
 
 class DatabaseWrapperTests(SimpleTestCase):
 
+    def test_repr(self):
+        conn = connections[DEFAULT_DB_ALIAS]
+        self.assertEqual(
+            repr(conn),
+            f"<DatabaseWrapper vendor={connection.vendor!r} alias='default'>",
+        )
+
     def test_initialization_class_attributes(self):
         """
         The "initialization" class attributes like client_class and