Rust Programming By Example

Ignoring tests

Sometimes, we have tests that take a lot of time, or we want to avoid running a specific test all the time. To avoid running a test by default, we can add the #[ignore] attribute above the function:

    #[ignore]
    #[test]
    fn test_dummy() {
        assert!(false, "Always fail");
    }

When we run the test, we'll see that the test function was not running:

    Finished dev [unoptimized + debuginfo] target(s) in 0.0 secs
     Running target/debug/deps/ftp_server-452667ddc2d724e8

running 2 tests
test codec::tests::test_dummy ... ignored
test codec::tests::test_encoder ... ok

test result: ok. 1 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out

As you can see, the test_dummy() test function was ignored. To run it, we need to specify a command-line ...