From b9b008c1d4a730335bdc9d465b0fdf7869fb09d4 Mon Sep 17 00:00:00 2001 From: Hunter Kvalevog Date: Sun, 27 Sep 2026 12:11:32 -0500 Subject: rustlings: complete 13 --- rustlings/solutions/13_error_handling/errors1.rs | 37 ++++++++++++++++++++++-- 1 file changed, 35 insertions(+), 2 deletions(-) (limited to 'rustlings/solutions/13_error_handling/errors1.rs') diff --git a/rustlings/solutions/13_error_handling/errors1.rs b/rustlings/solutions/13_error_handling/errors1.rs index dcf2377..f552ca7 100644 --- a/rustlings/solutions/13_error_handling/errors1.rs +++ b/rustlings/solutions/13_error_handling/errors1.rs @@ -1,4 +1,37 @@ +fn generate_nametag_text(name: String) -> Result { + // ^^^^^^ ^^^^^^ + if name.is_empty() { + // `Err(String)` instead of `None`. + Err("Empty names aren't allowed".to_string()) + } else { + // `Ok` instead of `Some`. + Ok(format!("Hi! My name is {name}")) + } +} + fn main() { - // DON'T EDIT THIS SOLUTION FILE! - // It will be automatically filled after you finish the exercise. + // You can optionally experiment here. +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn generates_nametag_text_for_a_nonempty_name() { + assert_eq!( + generate_nametag_text("Beyoncé".to_string()).as_deref(), + Ok("Hi! My name is Beyoncé"), + ); + } + + #[test] + fn explains_why_generating_nametag_text_fails() { + assert_eq!( + generate_nametag_text(String::new()) + .as_ref() + .map_err(|e| e.as_str()), + Err("Empty names aren't allowed"), + ); + } } -- cgit v1.2.3