prepare results wrapping for error handling architecture

tests/test_errors.py

@@ -76,7 +76,7 @@ def test_status_handler_api_error():
     assert new_err.api_server_error == api_err
 
 
-def test_status_handler_raising():
+def test_status_handler_unwrap():
     status_hdlr = errors.StatusHandler()
 
     # success: should not raise
@@ -121,3 +121,47 @@ def test_status_handler_raising():
             assert description in descr
             assert msg in descr
             raise err
+
+
+def test_status_handler_exception_parsing():
+    status_hdlr = errors.StatusHandler()
+    test_message = "Test Exception"
+    test_code = 110
+    exception = ValueError(test_message)
+    status = status_hdlr.exception_to_error(exception, test_code)
+    assert status.code == test_code
+    assert status.description == exception.__class__.__name__
+    assert status.message == test_message
+
+
+def test_not_set():
+    not_set = errors.NotSet()
+    # using slots, dynamic attribute generation should not be possible
+    with pytest.raises(AttributeError):
+        not_set.test = "try to set value"  # type: ignore
+
+
+def test_result_wrapper_class():
+    test_result = 10
+    error_code = 146
+    twrapper: errors.ResultWrapper[int] = errors.ResultWrapper(
+        result=test_result,
+        exception=None,
+        code_on_error=error_code,
+    )
+    assert twrapper.status == errors.STATUS_HANDLER.SUCCESS
+    assert twrapper.result == test_result
+    assert twrapper.status.code != error_code
+    # test for no result
+    test_result = errors.NotSet()
+    test_message = "Test of error message"
+    exception = ValueError(test_message)
+    twrapper: errors.ResultWrapper[int] = errors.ResultWrapper(
+        result=test_result,
+        exception=exception,
+        code_on_error=error_code,
+    )
+    assert twrapper.status != errors.STATUS_HANDLER.SUCCESS
+    assert twrapper.status.code == error_code
+    with pytest.raises(errors.WAccessResultDespiteError):
+        twrapper.result