[workspace - test] cargo test should output a summary after running all tests in a workspace

[robinmoussu]

Describe the problem you are trying to solve

In a "standard" crate, if you run cargo test, and everything is good, you can look at the last line of the output. In a crate that uses workspace, the output is much more messy, since each sub-crate will report their status, and you can't see immediately if everything went fine.

Describe the solution you'd like

In addition to the current output, if the current crate uses workspace, a global summary should be added at the end of the logs. Something like:

   Summary (in green)

test result: ok. 54 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out

[avl]

This would be very nice. I have a largish project at work with a lot of crates. I just realized I've had a bug on a working branch, detected by tests for several days, without realizing. The failing tests simply scrolled past too fast for me to be able to read see it. The last tested crates succeeded, meaning the last screenful contained no hint at all of any failing tests.

[FredTheDino]

Gonna go ahead and bump this! I've had similar problems to avl, not to mention that the output is quite noisy.

I took a quick look at the source, and this looks like a hard feature to implement. Since it looked like each sub-crate was compiled and run individually. This lead me to the conclusion that the easiest way might be to do a cargo-plugin that parses the output from cargo test.

I'm in a fixing mood and might just go ahead and write this thing - unless someone else sees an easier or better way?

[weihanglo]

From #11945 (comment):

Feel like this is also blocked on libtest's JSON output. Cargo needs a reliable way to collect such data. See #11875 (comment) for more. In the meantime, personally I'd recommend nextest, which has a handful of goodies for testing user experience.

[epage]

This reads like its a duplicate of #4324, closing in favor of that. If there is a reason we need a unique issue for this, let us know!