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

tests/queries/test_sqlcompiler.py

@@ -0,0 +1,17 @@
+from django.db import DEFAULT_DB_ALIAS, connection
+from django.db.models.sql import Query
+from django.test import SimpleTestCase
+
+from .models import Item
+
+
+class SQLCompilerTest(SimpleTestCase):
+    def test_repr(self):
+        query = Query(Item)
+        compiler = query.get_compiler(DEFAULT_DB_ALIAS, connection)
+        self.assertEqual(
+            repr(compiler),
+            f"<SQLCompiler model=Item connection="
+            f"<DatabaseWrapper vendor={connection.vendor!r} alias='default'> "
+            f"using='default'>"
+        )