import pytest
[docs]
class TestMessageDataFinder:
[docs]
@pytest.mark.parametrize("has_message_data", (False, True))
def test_exception(self, monkeypatch, has_message_data: bool) -> None:
""":meth:`.MessageDataFinder.find_spec` fails transparently."""
import message_ix_models.util.common
monkeypatch.setattr(
message_ix_models.util.common, "HAS_MESSAGE_DATA", has_message_data
)
try:
import message_ix_models.model.transport.not_.a.submodule # noqa: F401
except ImportError as e:
# The exception message mentions the original import name, not message_data
assert "named 'message_ix_models.model.transport" in repr(e)