adder_for_test/
lib.rs

1#[derive(Debug)]
2struct Rectangle {
3    width: u32,
4    height: u32,
5}
6
7impl Rectangle {
8    fn can_hold(&self, other: &Rectangle) -> bool {
9        self.width > other.width && self.height > other.height
10    }
11}
12/// Adds 2 to the number given.__rust_force_expr!
13///
14/// # Examples
15///
16/// ```
17/// let arg = 5;
18/// let answer = adder::add_two(arg);
19///
20/// assert_eq!(7,answer);
21/// ```
22pub fn add_two(a: i32) -> i32 {
23    a + 2
24}
25
26pub struct Guess {
27    value: i32,
28}
29
30impl Guess {
31    pub fn new(value: i32) -> Guess {
32        if value < 1 {
33            panic!(
34                "Guess value must be greater than or equal to 1, got {}.",
35                value
36            );
37        } else if value > 100 {
38            panic!(
39                "Guess value must be less than or equal to 100, got {}.",
40                value
41            );
42        }
43
44        Guess { value }
45    }
46}
47#[cfg(test)]
48mod tests {
49    use super::*;
50
51    #[test]
52    fn it_works() {
53        assert_eq!(2 + 2, 4);
54    }
55    #[test]
56    #[ignore]
57    fn another() {
58        panic!("Make this test fail");
59    }
60
61    #[test]
62    fn larger_can_hold_smaller() {
63        let larger = Rectangle {
64            width: 8,
65            height: 7,
66        };
67        let smaller = Rectangle {
68            width: 5,
69            height: 1,
70        };
71
72        assert!(larger.can_hold(&smaller));
73    }
74    #[test]
75    fn smaller_cannot_hold_larger() {
76        let larger = Rectangle {
77            width: 8,
78            height: 7,
79        };
80        let smaller = Rectangle {
81            width: 5,
82            height: 1,
83        };
84
85        assert!(!smaller.can_hold(&larger));
86    }
87
88    #[test]
89    fn id_adds_two() {
90        assert_eq!(4, add_two(2));
91    }
92
93    #[test]
94    #[should_panic(expected = "Guess value must be less than or equal to 100")]
95    fn greater_than_100() {
96        Guess::new(101);
97    }
98
99    #[test]
100    fn it_works_result() -> Result<(), String> {
101        if 2 + 2 == 4 {
102            Ok(())
103        } else {
104            Err(String::from("two plus two does not equal four"))
105        }
106    }
107}
adder_for_test/lib.rs

adder_for_test/
lib.rs
