test.adapter.json: add BytesIO test

test/adapter/json/test_json_serialization_deserialization.py

@@ -16,6 +16,8 @@
  example_aas_mandatory_attributes, example_submodel_template, create_example
 from basyx.aas.examples.data._helper import AASDataChecker
 
+from typing import Iterable, IO
+
 
 class JsonSerializationDeserializationTest(unittest.TestCase):
  def test_random_object_serialization_deserialization(self) -> None:
@@ -41,15 +43,17 @@ def test_random_object_serialization_deserialization(self) -> None:
  json_object_store = read_aas_json_file(io.StringIO(json_data), failsafe=False)
 
  def test_example_serialization_deserialization(self) -> None:
- data = example_aas.create_full_example()
- file = io.StringIO()
- write_aas_json_file(file=file, data=data)
-
- # try deserializing the json string into a DictObjectStore of AAS objects with help of the json module
- file.seek(0)
- json_object_store = read_aas_json_file(file, failsafe=False)
- checker = AASDataChecker(raise_immediately=True)
- example_aas.check_full_example(checker, json_object_store)
+ # test with TextIO and BinaryIO, which should both be supported
+ t: Iterable[IO] = (io.StringIO(), io.BytesIO())
+ for file in t:
+ data = example_aas.create_full_example()
+ write_aas_json_file(file=file, data=data)
+
+ # try deserializing the json string into a DictObjectStore of AAS objects with help of the json module
+ file.seek(0)
+ json_object_store = read_aas_json_file(file, failsafe=False)
+ checker = AASDataChecker(raise_immediately=True)
+ example_aas.check_full_example(checker, json_object_store)
 
 
 class JsonSerializationDeserializationTest2(unittest.TestCase):