Examples of using cargo test

cargo test - run all tests, which are not ignored. Their stdout is not shown/printed.

cargo test --help - see the documentation of cargo test. Note that it does not display the test options.

cargo test top_level_mod::tests::test_fn_name -- --exact - run a single test ¹. The --exact argument ensures that similar test names won't be executed ². Note that the path does not include the crate name.

Also see

• Chapter about writing automated test in the Rustbook.
• Cargo book entry on cargo test.
• cargo-nextest test runner

Footnotes

1. If you use VS Code, you can see the module path by hovering over the function definition. ↩

2. Surprisingly, I didn't find where to find information about the --exact flag. However, I found the usage example thanks to this Stack Overflow answer. And it seems to work. ↩