how to

To show output

Apr 28, 2024
langsrusttest
1 Minutes
95 Words

ref: https://stackoverflow.com/questions/54585804/how-to-run-a-specific-unit-test-in-rust

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rustc --test <file>

This generates a binary file. Then if you run the binary file, all tests will be conducted. Source code format be like:

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#[cfg(test)]
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mod tests {
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    use super::*;
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    #[test]
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    fn test_tuple_out_of_range_positive() {
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        assert_eq!(
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            Color::try_from((256, 1000, 10000)),
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            Err(IntoColorError::IntConversion)
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        );
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    }

To run a specific test, run:

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./xxx --exact test::test_tuple_out_of_range_positive

Cargo way

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cargo test test_fn_name # filters with test_fn_name
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cargo test test_fn_name -- --exact
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cargo test test_mod_name::test_fn_name -- --exact
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cargo test --package school_info repeat_students_should_not_get_full_marks -- --exact
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# To show output
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cargo test --package py-like --test io -- tests::main --exact --nocapture
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# test1() in helper.rs
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cargo test helper::test1 -- --exact
discard-changes-or-restore-a-file
Why do some trait implementations receive values, while others take references?
Article title：To show output
Article author：Julyfun
Release time：Apr 28, 2024
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