fix: validation of serialization methods

Makes sure object_attribute_names() works correctly.

CHANGELOG.md

@@ -17,7 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
-*
+* Issue with the `object_attribute_names()` method that prevented proper serialization
 
 ## [1.4.4] - 2022-12-31
 

src/colony/libs/object_util.py

@@ -81,7 +81,8 @@ def object_attribute_names(instance):
 
     # filters the attribute names based on the type and value
     # of them (non printable attributes are filtered out)
-    valid_attribute_names = [key for key, value in __object_items(instance) if type(value) in VALID_ATTRIBUTE_TYPES]
+    valid_attribute_names = [key for key, value in __object_items(instance) if\
+        isinstance(value, VALID_ATTRIBUTE_TYPES)]
 
     # returns the valid attribute names (ready for print)
     return valid_attribute_names

src/colony/test/libs/object_util.py

@@ -0,0 +1,68 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# Hive Colony Framework
+# Copyright (c) 2008-2022 Hive Solutions Lda.
+#
+# This file is part of Hive Colony Framework
+#
+# Hive Colony Framework is free software: you can redistribute it and/or modify
+# it under the terms of the Apache License as published by the Apache
+# Foundation, either version 2.0 of the License, or (at your option) any
+# later version.
+#
+# Hive Colony Framework is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# Apache License for more details.
+#
+# You should have received a copy of the Apache License along with
+# Hive Colony Framework If not, see <http://www.apache.org/licenses/>.
+
+__author__ = "João Magalhães <joamag@hive.pt>"
+""" The author(s) of the module """
+
+__version__ = "1.0.0"
+""" The version of the module """
+
+__revision__ = "$LastChangedRevision$"
+""" The revision number of the module """
+
+__date__ = "$LastChangedDate$"
+""" The last change date of the module """
+
+__copyright__ = "Copyright (c) 2008-2022 Hive Solutions Lda."
+""" The copyright for the module """
+
+__license__ = "Apache License, Version 2.0"
+""" The license for the module """
+
+import colony
+
+class ObjectTest(colony.ColonyTestCase):
+    """
+    Class that tests the object various functions method.
+    """
+
+    def test_object_attribute_names(self):
+        """
+        Tests the object attribute names selector function.
+        """
+
+        result = colony.object_attribute_names(
+            dict(
+                a = 2,
+                b = 1,
+                c = set()
+            )
+        )
+        self.assertEqual(result, ["a", "b"])
+
+        result = colony.object_attribute_names(
+            dict(
+                a = 2,
+                b = 1,
+                c = colony.Decimal(2.0)
+            )
+        )
+        self.assertEqual(result, ["a", "b", "c"])