The test runner captures stdout by default and prints it at the end of the test run, but only if the test failed. This is intended to turn down the noise of successful tests, especially the failing ones.
If you pass the --nocapture option to the test binary, it will disable this behavior and println will print to the terminal by default. On Mon, May 26, 2014 at 10:21 PM, Urban Hafner <[email protected]> wrote: > Hey everyone, > > still me, the Rust newbie ;) > > Coming from Ruby I use TDD quite heavily. For my toy rust project I've setup > my Makefile in such a way that it first compiles and runs a test build > before compiling the real executable. When trying to debug a failing test I > tried putting println! statements into the code under test. Apart from the > fact that I should probably start using a debugger instead I'd like to know > why the output doesn't show up. Does the test runner swallow it? Is there a > way to write to stdout or stderr during the test runs? > > Urban > -- > Freelancer > > Available for hire for Ruby, Ruby on Rails, and JavaScript projects > > More at http://urbanhafner.com > > _______________________________________________ > Rust-dev mailing list > [email protected] > https://mail.mozilla.org/listinfo/rust-dev > _______________________________________________ Rust-dev mailing list [email protected] https://mail.mozilla.org/listinfo/rust-dev
