src/doc/book/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/src/lib.rs

   1 pub struct Guess {
   2     value: i32,
   3 }
   4
   5 impl Guess {
   6     pub fn new(value: i32) -> Guess {
   7         // ANCHOR: here
   8         if value < 1 {
   9             panic!(
  10                 "Guess value must be less than or equal to 100, got {}.",
  11                 value
  12             );
  13         } else if value > 100 {
  14             panic!(
  15                 "Guess value must be greater than or equal to 1, got {}.",
  16                 value
  17             );
  18         }
  19         // ANCHOR_END: here
  20
  21         Guess { value }
  22     }
  23 }
  24
  25 #[cfg(test)]
  26 mod tests {
  27     use super::*;
  28
  29     #[test]
  30     #[should_panic(expected = "less than or equal to 100")]
  31     fn greater_than_100() {
  32         Guess::new(200);
  33     }
  34 }