v2.0.x Chore - better test loading

[reactive-firewall]

better test loading

Consider the following changes to tests/__init__.py:

-    suite.addTests(doctest.DocTestSuite(module=multicast, test_finder=finder))
-    suite.addTests(doctest.DocTestSuite(module=multicast.exceptions, test_finder=finder))
-    suite.addTests(doctest.DocTestSuite(module=multicast.skt, test_finder=finder))
-    suite.addTests(doctest.DocTestSuite(module=multicast.recv, test_finder=finder))
-    suite.addTests(doctest.DocTestSuite(module=multicast.send, test_finder=finder))
-    suite.addTests(doctest.DocTestSuite(module=multicast.hear, test_finder=finder))
+    modules_to_test = [
+        multicast, multicast.exceptions, multicast.skt,
+        multicast.recv, multicast.send, multicast.hear
+    ]
+    for module in modules_to_test:
+        try:
+            suite.addTests(doctest.DocTestSuite(module=module, test_finder=finder))
+        except ValueError as e:
+            # ValueError is raised when no tests are found
+            print(f"No doctests found in {module.__name__}: {e}")
+        except Exception as e:
+            print(f"Error loading doctests from {module.__name__}: {e}")