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#[cfg(test)]
mod tests {
use super::*;
#[test]
fn it_works() -> Result<(), String> {
if 2 + 2 == 4 {
Ok(())
}
else {
Err(String::from("two plus two does not equal four"))
}
}
#[test]
fn larger_can_hold_smaller() {
let larger = Rectangle { length: 8, width: 7 };
let smaller = Rectangle { length: 5, width: 1 };
assert!(larger.can_hold(&smaller));
}
#[test]
fn smaller_cannot_hold_larger() {
let larger = Rectangle { length: 8, width: 7 };
let smaller = Rectangle { length: 5, width: 1 };
assert!(!smaller.can_hold(&larger));
}
#[test]
fn it_adds_two() {
assert_eq!(4, add_two(2));
}
#[test]
fn it_wont_add_two() {
assert_ne!(4, add_two(3));
}
#[test]
fn greeting_contains_name() {
let result = greeting("adam");
assert!(result.contains("adam"));
}
#[test]
#[should_panic(expected = "must be between 1 and 100")]
fn greater_than_100() {
Guess::new(200);
}
}
#[derive(Debug)]
pub struct Rectangle {
length: u32,
width: u32,
}
pub struct Guess {
value: i32,
}
impl Guess {
pub fn new(value: i32) -> Guess {
if value < 1 || value > 100 {
panic!("must be between 1 and 100, not {}", value);
}
//if value < 1 {
// panic!("must be greater than 1, not {}", value);
//}
//else if value > 100 {
// panic!("must be less than 100, not {}", value);
//}
Guess { value }
}
}
impl Rectangle {
pub fn can_hold(&self, other: &Rectangle) -> bool {
self.length > other.length && self.width > other.width
}
}
pub fn add_two(a: i32) -> i32 {
a + 2
}
pub fn greeting(name: &str) -> String {
format!("hello {}", name)
}
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