validate null field

Author: sbelhaik

scene_common/src/scene_common/rest_client.py

@@ -269,7 +269,7 @@ def _separateFiles(self, data, fields):
     """Separates file fields from data dictionary for requests library"""
     files = None
     for fileField in fields:
-      if fileField in data and not isinstance(data[fileField], str):
+      if fileField in data and data[fileField] is not None and not isinstance(data[fileField], str):
         data = data.copy()
         files = {fileField: data[fileField]}
         data.pop(fileField)

tests/api/scenarios/asset_api.json

@@ -254,7 +254,7 @@
         "expected_status": {
           "status_code": 200
         },
-        "expected_body": {
+        "validate": {
           "model_3d": null
         }
       }