How to disable a unit test in rust with an attribute?

Question

A module contains multiple tests like following:

#[cfg(test)]
mod tests_cases {

    /*
    #[test]
    fn test_1() {
        let a = 1;
        let b = 2;
        println!("{},{}", a, b);
        assert_ne!(a, b);
    }
    */

    #[test]
    fn test_2() {
        let c = 1;
        let d = 1;
        println!("currently working on this: {},{}", c, d);
        assert_eq!(c, d);
    }
}

When working on the second tests with output visible (cargo test -- --nocapture), I do not want to see the output of the first tests.

Is there an option to disable the commented unit test? Or is there an option to just run the second unit test?

If you only want the output of a single test, you can request this like `cargo test module::tests::test_2` — Kendas, Oct 31 '21 at 05:43
Does this answer your question? [How to run a specific unit test in Rust?](https://stackoverflow.com/questions/54585804/how-to-run-a-specific-unit-test-in-rust) — Ömer Erden, Oct 31 '21 at 06:40

score 46 · Accepted Answer · edited Feb 13 '23 at 14:21

46

Another option is to add the #[ignore] attribute.

#[ignore]
#[test]
fn test_1() {
    let a = 1;
    let b = 2;
    println!("{},{}", a, b);
    assert_ne!(a, b);
}

This adds a nice colored ignored to the test results.

test tests::test_1 ... ignored
test tests::test_2 ... ok

test result: ok. 1 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.03s

Source: Ignoring Some Tests Unless Specifically Requested

edited Feb 13 '23 at 14:21

BinaryButterfly

18,137
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answered Nov 01 '21 at 19:01

chriamue

961
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6

This answer is better then mine. This should be the accepted answer. – Refael Sheinker Nov 01 '21 at 20:40
The little things like this that rust does OOTB make the development experience so good! – Nathaniel Rogers Jan 24 '23 at 00:20
A reason for ignoring can be stated with `#[ignore = "ignore for now"]` – TF.Ryan May 16 '23 at 17:38

score 6 · Answer 2 · answered Oct 31 '21 at 10:32

6

If you remove the #[test] attribute from the unwanted test, then cargo test will ignore it.

answered Oct 31 '21 at 10:32

Refael Sheinker

713
7
20

How to disable a unit test in rust with an attribute?

2 Answers2