Module x was previously imported, but not measured (module-not-measured)

[graingert-coef]

Summary

when running with pytest-cov I get a ' Module x was previously imported, but not measured (module-not-measured)' but it is actually measured.

see the output here:
https://github.com/graingert-coef/coverage-test/actions/runs/11383996856/job/31670778809#step:4:33

full reproducer here: https://github.com/graingert-coef/coverage-test/

[graingert-coef]

the problem seems to be related to the fact that you end up with ['coverage_test', 'coverage_test'] in self.source_pkgs_unmatched and coverage only removes on instance of it

https://github.com/nedbat/coveragepy/blob/fb2b49fb1beb810c6d7ee1cfbbf75a3ff8574fbf/coverage/inorout.py#L199

[graingert-coef]

according to this

pytest-cov/src/pytest_cov/plugin.py

Lines 91 to 92 in 76fe2a7

	help='Path or package name to measure during execution (multi-allowed). '
	'Use --cov= to not do any source filtering and record everything.',

I can set --cov= but that also results in a warning:

https://github.com/graingert-coef/coverage-test/pull/1/files#diff-50c86b7ed8ac2cf95bd48334961bf0530cdc77b5a56f852c5c61b89d735fd711R25
https://github.com/graingert-coef/coverage-test/actions/runs/11384119440/job/31671155042?pr=1#step:4:33

in this case you end up with ['', 'coverage_test'] in self.source_pkgs_unmatched

[graingert-coef]

If I set "--cov", this works fine - but then running pipx run tox -- src/coverage_test/tests/test_app.py the --cov consumes the path arg and I get CoverageWarning: Module src/coverage_test/tests/test_app.py was never imported.