Fixed #33308 -- Added support for psycopg version 3.

Thanks Simon Charette, Tim Graham, and Adam Johnson for reviews.

Co-authored-by: Florian Apolloner <florian@apolloner.eu>
Co-authored-by: Mariusz Felisiak <felisiak.mariusz@gmail.com>

tests/postgres_tests/test_apps.py

@@ -19,6 +19,7 @@ try:
         DateTimeRange,
         DateTimeTZRange,
         NumericRange,
+        is_psycopg3,
     )
 except ImportError:
     pass
@@ -59,6 +60,7 @@ class PostgresConfigTests(TestCase):
                         MigrationWriter.serialize(field)
 
         assertNotSerializable()
+        import_name = "psycopg.types.range" if is_psycopg3 else "psycopg2.extras"
         with self.modify_settings(INSTALLED_APPS={"append": "django.contrib.postgres"}):
             for default, test_field in tests:
                 with self.subTest(default=default):
@@ -68,16 +70,12 @@ class PostgresConfigTests(TestCase):
                         imports,
                         {
                             "import django.contrib.postgres.fields.ranges",
-                            "import psycopg2.extras",
+                            f"import {import_name}",
                         },
                     )
                     self.assertIn(
-                        "%s.%s(default=psycopg2.extras.%r)"
-                        % (
-                            field.__module__,
-                            field.__class__.__name__,
-                            default,
-                        ),
+                        f"{field.__module__}.{field.__class__.__name__}"
+                        f"(default={import_name}.{default!r})",
                         serialized_field,
                     )
         assertNotSerializable()

tests/postgres_tests/test_array.py

@@ -317,7 +317,7 @@ class TestQuerying(PostgreSQLTestCase):
     def test_in_including_F_object(self):
         # This test asserts that Array objects passed to filters can be
         # constructed to contain F objects. This currently doesn't work as the
-        # psycopg2 mogrify method that generates the ARRAY() syntax is
+        # psycopg mogrify method that generates the ARRAY() syntax is
         # expecting literals, not column references (#27095).
         self.assertSequenceEqual(
             NullableIntegerArrayModel.objects.filter(field__in=[[models.F("id")]]),