Fix warning MissingReferenceMetadata when running unit test tests/unit_tests/simtel/test_simulator_light_emission.py::test_plot_simtel_ctapipe

[GernotMaier]

pytest --no-cov tests/unit_tests/simtel/test_simulator_light_emission.py::test_plot_simtel_ctapipe gives the following warning:

/Users/maierg/micromamba/envs/simtools-dev/lib/python3.11/site-packages/ctapipe/core/provenance.py:332: MissingReferenceMetadata: Could not read reference metadata for input file: /Users/maierg/DESYCloud/CTA/Pipelines/MC-Pipeline/gammasim-tools/simtools/tests/resources/xyzls_layout.simtel.gz

This should be fixed.

[maxnoe]

I think this is as much an issue for ctapipe as here.

At the moment, we know that we cannot expect this metadata in simtel files, so ctapipe shouldn't warn about it.

In the long-term, simpipe should make sure that the required CTAO reference metadata is stored, by using the simtel metaparams system and ctapipe should read it.

I opened a PR in ctapipe to silence this warning for now here:
cta-observatory/ctapipe#2644

[orelgueta]

A fix for this was introduced in cta-observatory/ctapipe#2648 which was included in ctapipe v0.23.0. I do not see the warning anymore when running

pytest --no-cov tests/unit_tests/simtel/test_simulator_light_emission.py::test_plot_simtel_ctapipe

Can we therefore close this issue?

[GernotMaier]

Yes, we can close this.