Rust Programming Cookbook

How to do it...

Let's examine how we can take control of multiple panic! instances:

1. Create a new project with cargo new panicking-responsibly --lib and open it with VS Code.
2. Open src/lib.rs and replace the default tests with a regular, straightforward panic instances:

#[cfg(test)]mod tests {    #[test]    #[should_panic]    fn test_regular_panic() {        panic!();    }}

3. There are many other ways to halt the program too. Let's add another test instance:

    #[test]    #[should_panic]    fn test_unwrap() {        // panics if "None"        None::<i32>.unwrap();    }

4. However, these panics all have a generic error message, which is not very informative with regard to what the application was doing. Using expect() lets you provide an error message to explain the causes of the ...