feat(DB engine spec): get_catalog_names (#23447)

tests/integration_tests/db_engine_specs/postgres_tests.py

@@ -17,6 +17,7 @@
 from textwrap import dedent
 from unittest import mock
 
+from flask.ctx import AppContext
 from sqlalchemy import column, literal_column
 from sqlalchemy.dialects import postgresql
 
@@ -24,6 +25,7 @@ from superset.db_engine_specs import load_engine_specs
 from superset.db_engine_specs.postgres import PostgresEngineSpec
 from superset.errors import ErrorLevel, SupersetError, SupersetErrorType
 from superset.models.sql_lab import Query
+from superset.utils.database import get_example_database
 from tests.integration_tests.db_engine_specs.base_tests import TestDbEngineSpec
 from tests.integration_tests.fixtures.certificates import ssl_certificate
 from tests.integration_tests.fixtures.database import default_db_extra
@@ -514,3 +516,19 @@ def test_base_parameters_mixin():
         },
         "required": ["database", "host", "port", "username"],
     }
+
+
+def test_get_catalog_names(app_context: AppContext) -> None:
+    """
+    Test the ``get_catalog_names`` method.
+    """
+    database = get_example_database()
+
+    if database.backend != "postgresql":
+        return
+
+    with database.get_inspector_with_context() as inspector:
+        assert PostgresEngineSpec.get_catalog_names(database, inspector) == [
+            "postgres",
+            "superset",
+        ]