option to unwrap errors

tests/test_errors.py

@@ -74,3 +74,51 @@ def test_state_handler_api_error():
     assert new_err.message != MESSAGE
     assert new_err.api_server_error is not None
     assert new_err.api_server_error == api_err
+
+
+@pytest.mark.new
+def test_state_handler_raising():
+    state_hdlr = delta_barth._management.StateHandler()
+
+    # success: should not raise
+    err_state = state_hdlr.SUCCESS
+    assert state_hdlr.unwrap(err_state) is None
+    # data related errors (predefined)
+    err_state = state_hdlr.pipe_states.BAD_QUALITY
+    err_descr = err_state.description
+    with pytest.raises(errors.UDataProcessingError):
+        try:
+            state_hdlr.unwrap(err_state)
+        except errors.UDataProcessingError as err:
+            descr = str(err)
+            assert err_descr in descr
+            raise err
+    # internal error, not data-related
+    description = "test case"
+    message = "an error occurred"
+    err_code = 101
+    err_state = state_hdlr.error(
+        description=description,
+        message=message,
+        code=err_code,
+    )
+    with pytest.raises(errors.UInternalError):
+        try:
+            state_hdlr.unwrap(err_state)
+        except errors.UInternalError as err:
+            descr = str(err)
+            assert description in descr
+            raise err
+    # external API error
+    api_err = DelBarApiError(status_code=401, message="test case", code="1234")
+    description = "Kommunikation mit dem API-Server aufgetreten"
+    msg = "Bitte beachten Sie die"
+    err_state = state_hdlr.api_error(error=api_err)
+    with pytest.raises(errors.UApiError):
+        try:
+            state_hdlr.unwrap(err_state)
+        except errors.UApiError as err:
+            descr = str(err)
+            assert description in descr
+            assert msg in descr
+            raise err