Remove test_rest_serializers_and_types.py and test_websocket_serializers_and_types.py. Add new test_rest_serializers.py and test_websocket_serializers.py unit tests. Edit bfxapi.tests.__init__.py's test suite.

bfxapi/tests/test_websocket_serializers.py

@@ -0,0 +1,17 @@
+import unittest
+
+from ..labeler import _Type
+
+from ..websocket import serializers
+
+class TestWebsocketSerializers(unittest.TestCase):
+    def test_websocket_serializers(self):
+        for serializer in map(serializers.__dict__.get, serializers.__serializers__):
+            self.assertTrue(issubclass(serializer.klass, _Type), 
+                f"_Serializer <{serializer.name}>: .klass field must be a subclass of _Type (got {serializer.klass}).")
+            
+            self.assertListEqual(serializer.get_labels(), list(serializer.klass.__annotations__), 
+                f"_Serializer <{serializer.name}> and _Type <{serializer.klass.__name__}> must have matching labels and fields.")
+
+if __name__ == "__main__":
+    unittest.main()