Module snapbox::harness

Available on crate feature harness only.

Harness for discovering test inputs and asserting against snapshot files

Examples

snapbox::harness::Harness::new(
    "tests/fixtures/invalid",
    setup,
    test,
)
.select(["tests/cases/*.in"])
.action_env("SNAPSHOTS")
.test();

fn setup(input_path: std::path::PathBuf) -> snapbox::harness::Case {
    let name = input_path.file_name().unwrap().to_str().unwrap().to_owned();
    let expected = input_path.with_extension("out");
    snapbox::harness::Case {
        name,
        fixture: input_path,
        expected,
    }
}

fn test(input_path: &std::path::Path) -> Result<usize, Box<dyn std::error::Error>> {
    let raw = std::fs::read_to_string(input_path)?;
    let num = raw.parse::<usize>()?;

    let actual = num + 10;

    Ok(actual)
}

Structs

• Case
• Harness