Could log output be shown in tests?

[martinlindhe]

Normally running tests mutes standard output, but using this rather obscure command cargo test -- --nocapture, output such as println!("something"); is shown in the test result.
This is great for debugging. However, it doesn't appear to work with the log macros.

I found #56 which documents how to enable output in tests specifically, but I am wondering if there is some easier way?

[sfackler]

This seems like more of a rust-lang/rust issue than this crate - log doesn't touch println at all.

[martinlindhe]

@sfackler Thanks for clarifying! I think I got confused by the documentation.

[martinlindhe]

Posting for reference: After some digging, I found a report of this already at rust-lang/rust#40298

[cbarber]

Leaving this for google results. A decent work around:

#[cfg(not(test))]
use log::{info, warn};
 
#[cfg(test)]
use std::{println as info, println as warn};

[AlejandroFNadal]

For people searching and finding this issue:

Add in each test, instead of
#[test]
put:

#[test_log::test]

Then, to cargo toml

[dev-dependencies]
test-log = "*"

Finally, set env variable to desired debugging level:
export RUST_LOG="debug"