.unwrap()
            .to_string(),
    );
}
#[test]
fn test_downcast_ref() {
    assert_eq!(
        "oh no!",
        *bail_literal().unwrap_err().downcast_ref::<&str>().unwrap(),
    );
    assert_eq!(
        "oh no!",
        bail_fmt().unwrap_err().downcast_ref::<String>().unwrap(),
    );
    assert_eq!(
        "oh no!",
        bail_error()
            .unwrap_err()
            .downcast_ref::<io::Error>()
            .unwrap()
            .to_string(),
    );
}
#[test]
fn test_downcast_mut() {
    assert_eq!(
        "oh no!",
        *bail_literal().unwrap_err().downcast_mut::<&str>().unwrap(),
    );
    assert_eq!(
        "oh no!",
        bail_fmt().unwrap_err().downcast_mut::<String>().unwrap(),
    );
    assert_eq!(
        "oh no!",
        bail_error()
            .unwrap_err()
            .downcast_mut::<io::Error>()