105 lines
2.1 KiB
Rust
105 lines
2.1 KiB
Rust
#[derive(Debug)]
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pub struct Rectangle {
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length: u32,
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width: u32,
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}
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impl Rectangle {
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pub fn can_hold(&self, other: &Rectangle) -> bool {
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self.length > other.length && self.width > other.width
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}
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}
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pub fn add_two(a: i32) -> i32 {
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a + 2
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}
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pub fn greeting(name: &str) -> String {
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format!("Hello, {}!", name)
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}
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pub struct Guess {
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value: i32,
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}
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impl Guess {
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pub fn new(value: i32) -> Guess {
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if value < 1 {
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panic!("Guess value must be greater than or equal to 1, got {}.",
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value);
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} else if value > 100 {
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panic!("Guess value must be less than or equal to 100, got {}.",
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value);
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}
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Guess {
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value
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}
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}
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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 it_works() -> Result<(), String> {
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if 2 + 2 == 4 {
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Ok(())
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} else {
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Err(String::from("two plus two does not equal four"))
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}
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}
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#[test]
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fn add_two_and_two() {
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assert_eq!(4, add_two(2));
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}
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#[test]
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fn add_three_and_two() {
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assert_eq!(5, add_two(3));
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}
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#[test]
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fn one_hundred() {
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assert_eq!(102, add_two(100));
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}
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#[test]
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fn larger_can_hold_smaller() {
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let larger = Rectangle { length: 8, width: 7 };
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let smaller = Rectangle { length: 5, width: 1 };
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assert!(larger.can_hold(&smaller));
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}
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#[test]
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fn smaller_cannot_hold_larger() {
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let larger = Rectangle { length: 8, width: 7 };
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let smaller = Rectangle { length: 5, width: 1 };
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assert!(!smaller.can_hold(&larger));
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}
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#[test]
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fn it_adds_two() {
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assert_eq!(4, add_two(2));
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}
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#[test]
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fn greeting_contains_name() {
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let result = greeting("Carol");
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assert!(
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result.contains("Carol"),
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"Greeting did not contain name, value was `{}`", result
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);
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}
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#[test]
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#[should_panic(expected = "Guess value must be less than or equal to 100")]
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fn greater_than_100() {
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Guess::new(200);
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}
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}
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