`cargo test` does not give any warning when the specific test case does not exist

[yipu3]

Problem

If I run cargo test xxx when xxx does not exist. cargo does not give any warning but output a bunch of green output.

For example. I have a test case test_foo. Every time I change foo I run this test case by running cargo test test_foo. Then I change the name from test_foo to test_foo_ and forget to change the test command(For example, by using bash history). So every time I run cargo test I still got a bunch of green output which make me take the test as passed for granted, causing more confusion in the future.

Steps

cargo test xxx
xxx is a non-existing test case

Possible Solution(s)

Give warnings if the test case does not exist.

Notes

No response

Version

[weihanglo]

Thanks for the proposal.

This is a duplicate of #11875, and is not a thing Cargo can control at this moment.

rust-lang/testing-devex-team#1 is an effort of providing a JSON output so that Cargo and other tools may have more chances to control how tests are executed.

Close in favor of aforementioned issues.