How to expect an exact exit code for a test?

[apache-hb]

Currently meson has no way to assert that a test returns an exact exit code, this would be useful if a test is expected to fail with a specific failure state. it would also allow tests that should_fail to distinguish between an error code and a segmentation fault or abort. Would this be something meson would be open to allowing or is there a specific reason why this isnt implemented?

[eli-schwartz]

The problem with should_fail is that it doesn't indicate that the test passes if the exit code indicates failure... rather, should_fail indicates that the test is supposed to be an "expected failure", i.e. a known bug (and if it ever emits a successful exit code, the test runner should report an "unexpected pass" which you're supposed to fix by removing the should_fail keyword).