#[derive(Debug)]
struct Rectangle {
    width: u32,
    height: u32,
}

impl Rectangle {
    fn can_hold(&self, other: &Rectangle) -> bool {
        self.width >= other.width && self.height >= other.height
    }
}

pub fn greeting(name: &str) -> String {
    format!("hello {}!", name)
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn exception() {
        let result = 2+2;
        assert_eq!(result, 4);
    }
    #[test]
    fn another() {
        println!("this one will fail");
    }

    #[test]
    fn hold() {
        let larger = Rectangle {
            width: 7,
            height: 8,
        };
        
        let smaller = Rectangle {
            width: 5,
            height: 4,
        };

        assert!(larger.can_hold(&smaller));
    }

    #[test]
    fn greeting_contain_names() {
        let result = greeting("caol");
        assert!(result.contains("carol"), "gretting did not contain name, the value is {}", result);
    }
}