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