pub struct Coordinates {
    pub latitude: f64,
    pub longitude: f64,
}

impl Coordinates {
    pub fn new(latitude: f64, longitude: f64) -> Coordinates {
        Coordinates {
            latitude,
            longitude,
        }
    }

    pub fn is_correct_latitude(&self) -> bool {
        self.latitude > -90.0 && self.latitude < 90.0
    }

    pub fn is_correct_longitude(&self) -> bool {
        self.longitude > -180.0 && self.longitude < 180.0
    }
}

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

    #[test]
    fn valid_coords() {
        let coords = Coordinates {
            latitude: -20.0,
            longitude: 15.0,
        };

        assert!(coords.is_correct_latitude());
        assert!(coords.is_correct_longitude());
    }

    #[test]
    fn invalid_coords() {
        let coords = Coordinates {
            latitude: -95.0,
            longitude: 185.0,
        };

        assert!(!coords.is_correct_latitude());
        assert!(!coords.is_correct_longitude());
    }
}