Function test_directory

crates/test-helpers/src/lib.rs:15–30

Returns a suitable directory to place output for tests within. This tries to pick a location in the `target` directory that can be relatively easily debugged if a test goes wrong.

(suite_name: &str, gen_name: &str, wit_name: &str)

/// This tries to pick a location in the `target` directory that can be
/// relatively easily debugged if a test goes wrong.
pub fn test_directory(suite_name: &str, gen_name: &str, wit_name: &str) -> PathBuf {
    let mut me = std::env::current_exe().unwrap();
    me.pop(); // chop off exe name
    me.pop(); // chop off 'deps'
    me.pop(); // chop off 'debug' / 'release'
    me.push(format!("{suite_name}-tests"));
    me.push(gen_name);

    // replace `-` with `_` for Python where the directory needs to be a valid
    // Python package name.
    me.push(wit_name.replace("-", "_"));

    drop(fs::remove_dir_all(&me));
    fs::create_dir_all(&me).unwrap();
    return me;
}

/// Helper function to execute a process during tests and print informative
/// information if it fails.