use indoc::concatdoc; macro_rules! env { ($var:literal) => { "test" }; } static HELP: &str = concatdoc! {" Usage: ", env!("CARGO_BIN_NAME"), " [options] Options: -h, --help "}; #[test] fn test_help() { let expected = "Usage: test [options]\n\nOptions:\n -h, --help\n"; assert_eq!(HELP, expected); }