Updated unit tests accordingly

Author: tisnik

tests/unit/models/config/test_postgresql_database_configuration.py

@@ -264,3 +264,48 @@ def test_postgresql_database_configuration_improper_ssl_mode(
                     password="password",
                     ssl_mode=ssl_mode,
                 )  # pyright: ignore[reportCallIssue]
+
+
+def test_postgresql_database_configuration_gss_encmode(subtests: SubTests) -> None:
+    """Test the PostgreSQLDatabaseConfiguration model."""
+    gss_encmodes = ("disable", "prefer", "require")
+
+    for gss_encmode in gss_encmodes:
+        with subtests.test(msg=f"GSS encmode {gss_encmode}"):
+            # pylint: disable=no-member
+            c = PostgreSQLDatabaseConfiguration(
+                db="db",
+                user="user",
+                password="password",
+                gss_encmode=gss_encmode,
+            )  # pyright: ignore[reportCallIssue]
+
+            # most attributes are set to default values
+            assert c is not None
+            assert c.host == "localhost"
+            assert c.port == 5432
+            assert c.db == "db"
+            assert c.user == "user"
+            assert c.password.get_secret_value() == "password"
+            assert c.ssl_mode == POSTGRES_DEFAULT_SSL_MODE
+            assert c.gss_encmode == gss_encmode
+            assert c.namespace == "public"
+            assert c.ca_cert_path is None
+
+
+def test_postgresql_database_configuration_improper_gss_encmode(
+    subtests: SubTests,
+) -> None:
+    """Test the PostgreSQLDatabaseConfiguration model."""
+    gss_encmodes = ("foo", "bar", "baz", "")
+
+    for gss_encmode in gss_encmodes:
+        with subtests.test(msg=f"GSS encmode {gss_encmode}"):
+            with pytest.raises(ValueError, match="Input should be 'disable'"):
+                # pylint: disable=no-member
+                PostgreSQLDatabaseConfiguration(
+                    db="db",
+                    user="user",
+                    password="password",
+                    gss_encmode=gss_encmode,
+                )  # pyright: ignore[reportCallIssue]