Comment (by Roland Haas):

The test counts as “passed” if there are no output files provided and the code exits cleanly (exit code 0). having some output can of course be useful to diagnose what failed (and also that the numbers are correct). Eg if the ID reader puts the metric where the curvature is expected that likely still gives exit code 0 but is of course completely wrong.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2747/inclusion-of-sgrid-importer-in-einstein