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struct Rectangle {
width: i32,
height: i32,
}
impl Rectangle {
// Don't change this function.
fn new(width: i32, height: i32) -> Self {
if width <= 0 || height <= 0 {
// Returning a `Result` would be better here. But we want to learn
// how to test functions that can panic.
panic!("Rectangle width and height must be positive");
}
Rectangle { width, height }
}
}
fn main() {
// You can optionally experiment here.
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn correct_width_and_height() {
// TODO: This test should check if the rectangle has the size that we
// pass to its constructor.
let rect = Rectangle::new(10, 20);
assert_eq!(todo!(), 10); // Check width
assert_eq!(todo!(), 20); // Check height
}
// TODO: This test should check if the program panics when we try to create
// a rectangle with negative width.
#[test]
fn negative_width() {
let _rect = Rectangle::new(-10, 10);
}
// TODO: This test should check if the program panics when we try to create
// a rectangle with negative height.
#[test]
fn negative_height() {
let _rect = Rectangle::new(10, -10);
}
}
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