// Tests are important to ensure that your code does what you think it should
// do. Tests can be run on this file with the following command: rustlings run
// tests1
//
// This test has a problem with it -- make the test compile! Make the test pass!
// Make the test fail!

#[cfg(test)]
mod tests {
    #[test]
    fn you_can_assert() {
        assert!();
    }
}

#[cfg(test)]
mod tests {
    #[test]
    fn you_can_assert() {
        let first_param = 10;
        let second_param = 20;
        assert!(first_param < second_param);
    }
}

#[cfg(test)]
mod tests {
    #[test]
    fn you_can_assert() {
        let first_param = 10;
        let second_param = 20;
        assert!(first_param > second_param);
    }
}

// This test has a problem with it -- make the test compile! Make the test pass!
// Make the test fail!

#[cfg(test)]
mod tests {
    #[test]
    fn you_can_assert_eq() {
        assert_eq!();
    }
}

#[cfg(test)]
mod tests {
    #[test]
    fn you_can_assert_eq() {
      let expected = 10;
      let actual = 10;
      assert_eq!(expected, actual);
    }
}

// This test isn't testing our function -- make it do that in such a way that
// the test passes. Then write a second test that tests whether we get the
// result we expect to get when we call `is_even(5)`.

pub fn is_even(num: i32) -> bool {
    num % 2 == 0
}

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

    #[test]
    fn is_true_when_even() {
        assert!();
    }

    #[test]
    fn is_false_when_odd() {
        assert!();
    }
}

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

    #[test]
    fn is_true_when_even() {
        assert!(is_even(2));
    }

    #[test]
    fn is_false_when_odd() {
        assert!(!is_even(5));
    }
}

// Make sure that we're testing for the correct conditions!

struct Rectangle {
    width: i32,
    height: i32
}

impl Rectangle {
    // Only change the test functions themselves
    pub fn new(width: i32, height: i32) -> Self {
        if width <= 0 || height <= 0 {
            panic!("Rectangle width and height cannot be negative!")
        }
        Rectangle {width, height}
    }
}

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

    #[test]
    fn correct_width_and_height() {
        // This test should check if the rectangle is the size that we pass into its constructor
        let rect = Rectangle::new(10, 20);
        assert_eq!(???, 10); // check width
        assert_eq!(???, 20); // check height
    }

    #[test]
    fn negative_width() {
        // This test should check if program panics when we try to create rectangle with negative width
        let _rect = Rectangle::new(-10, 10);
    }

    #[test]
    fn negative_height() {
        // This test should check if program panics when we try to create rectangle with negative height
        let _rect = Rectangle::new(10, -10);
    }
}

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

    #[test]
    fn correct_width_and_height() {
        // This test should check if the rectangle is the size that we pass into its constructor
        let rect = Rectangle::new(10, 20);
        assert_eq!(rect.width, 10); // check width
        assert_eq!(rect.height, 20); // check height
    }

    #[test]
    #[should_panic(expected = "Rectangle width and height cannot be negative!")]
    fn negative_width() {
        // This test should check if program panics when we try to create rectangle with negative width
        let _rect = Rectangle::new(-10, 10);
    }

    #[test]
    #[should_panic(expected = "Rectangle width and height cannot be negative!")]
    fn negative_height() {
        // This test should check if program panics when we try to create rectangle with negative height
        let _rect = Rectangle::new(10, -10);
    }
}