Expand test modules

[gnzlbg]

I am trying to expand some macros inside #[cfg(test)] mod tests { .... } modules and failing.

I have tried: cargo expand --tests, cargo expand --test path/to/file.rs, cargo expand --test file, cargo expand test` (like cargo test but with expand), without any luck.

I've also tried by copying the relevant code into tests/file.rs and trying to cargo expand --test tests/file.rs instead.

[dtolnay]

Expanding test code in the library requires passing --test to rustc (not to cargo). This should work: cargo expand -- --test.

[gnzlbg]

Thanks, I managed to get it to work. I was doing cargo expand -h to get help and that was suggesting me to use just --test. It was very confusing.