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testingrust

How do I test private methods in Rust?

How do I test private methods in Rust? I didn't find any information about it. There's no information in the documentation either.

Solution

  • When using #[test], there’s nothing special about private or public methods—you’re just writing perfectly normal functions that can access anything they can access.

    fn private_function() {
}

#[test]
fn test_private_function() {
    private_function()
}

    External tests, such as tests/*.rs and examples/*.rs if you’re using Cargo, or doc tests, do not get access to private members; nor should they: such tests are designed to be public API tests, not to be dealing with implementation details.