Screens serialization not symmetric #22

tests/src/erc7730/common/test_datamodel.py

@@ -3,6 +3,7 @@
 from erc7730.common.pydantic import json_file_from_model
 from erc7730.model.context import AbiJsonSchemaItem
 from erc7730.model.erc7730_descriptor import ERC7730Descriptor
+from erc7730.model.display import Display
 import pytest
 import glob
 import json
@@ -38,3 +39,14 @@ def test_23_unset_attributes_must_not_be_serialized_as_set() -> None:
     abi_item_json_str_deserialized = json_file_from_model(AbiJsonSchemaItem, abi_item)
     print_diff(abi_item_json_str, abi_item_json_str_deserialized)
     assert abi_item_json_str == abi_item_json_str_deserialized
+
+
+display_json_str = '{"formats":{"Permit":{"screens":{"stax":[{"type":"propertyPage","label":"DAI Permit","content":["spender","value","deadline"]}]}}}}'
+
+
+def test_22_screens_serialization_not_symmetric() -> None:
+    display_json = json.loads(display_json_str)
+    display = Display.model_validate(display_json, strict=False)
+    display_json_deserialized = json_file_from_model(Display, display)
+    print_diff(display_json_str, display_json_deserialized)
+    assert display_json_str == display_json_deserialized