add test

Author: Victoria Hall

tests/decorators/test_blob.py

@@ -50,7 +50,7 @@ def test_blob_trigger_creation_with_source_as_string(self):
         trigger = BlobTrigger(name="req",
                               path="dummy_path",
                               connection="dummy_connection",
-                              source=BlobSource.EVENT_GRID,
+                              source="EventGrid",
                               data_type=DataType.UNDEFINED,
                               dummy_field="dummy")