carman/tests/integration.rs

// filename: tests/integration.rs

mod integration {
    use regex::Regex;
    use std::process::Command;

    #[test]
    fn calling_carman_without_args_returns_result() {
        let output = Command::new("./target/debug/carman")
            .output()
            .expect("failed to execute process");
        let re = Regex::new(r"^Hello").unwrap();
        assert!(re.is_match(&String::from_utf8_lossy(&output.stdout)));
    }

    #[test]
    fn calling_carman_with_help_returns_usage() {
        let output = Command::new("./target/debug/carman")
            .arg("--help")
            .output()
            .expect("failed to execute process");
        let re = Regex::new(r"^carman").unwrap();
        assert!(re.is_match(&String::from_utf8_lossy(&output.stdout)));
        let re = Regex::new(r"--help").unwrap();
        assert!(re.is_match(&String::from_utf8_lossy(&output.stdout)));
    }
}