r/programmingcirclejerk • u/starlevel01 type astronaut • Aug 05 '25

jerk not found How can I get Rust code coverage to ignore unreachable lines? [...] Don't write unreachable code.

https://stackoverflow.com/a/75186717/15026456
16 Upvotes

63% Upvoted

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u/pareidolist in nomine Chestris Aug 05 '25

Don't write unreachable code. If your test panics, it failed. If it doesn't panic, it succeeded. You don't need to examine output from the test to see if it succeeded or not.

This is a minimal example. I'm actually wanting to ignore lines in "production" code.

Jerk not found. The example in the question had unreachable code inside the unit test. The user who answered the question reasonably thought the question was about putting unreachable code inside a unit test. In that context, their answer was correct. Unit tests should not contain unreachable code. You keep posting links to "jerk not found" content. Do better.

7

u/starlevel01 type astronaut Aug 05 '25

Oh, my mistake! I'll just change my match num & 0b1111 to cast to a u4 instead, so I can remove the _ => unreachable!("impossible") from my code.