// Make sure that we're testing for the correct conditions! struct Rectangle { width: i32, height: i32, } impl Rectangle { // Only change the test functions themselves fn new(width: i32, height: i32) -> Self { if width <= 0 || height <= 0 { panic!("Rectangle width and height cannot be negative!") } Rectangle { width, height } } } fn main() { // You can optionally experiment here. } #[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); } }