41 lines
985 B
Rust
41 lines
985 B
Rust
// strings3.rs
|
|
//
|
|
// Execute `rustlings hint strings3` or use the `hint` watch subcommand for a
|
|
// hint.
|
|
|
|
fn trim_me(input: &str) -> String {
|
|
String::from(input.trim())
|
|
}
|
|
|
|
fn compose_me(input: &str) -> String {
|
|
input.to_owned() + " world!"
|
|
}
|
|
|
|
fn replace_me(input: &str) -> String {
|
|
String::from(input.replace("cars", "balloons"))
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn trim_a_string() {
|
|
assert_eq!(trim_me("Hello! "), "Hello!");
|
|
assert_eq!(trim_me(" What's up!"), "What's up!");
|
|
assert_eq!(trim_me(" Hola! "), "Hola!");
|
|
}
|
|
|
|
#[test]
|
|
fn compose_a_string() {
|
|
assert_eq!(compose_me("Hello"), "Hello world!");
|
|
assert_eq!(compose_me("Goodbye"), "Goodbye world!");
|
|
}
|
|
|
|
#[test]
|
|
fn replace_a_string() {
|
|
assert_eq!(replace_me("I think cars are cool"), "I think balloons are cool");
|
|
assert_eq!(replace_me("I love to look at cars"), "I love to look at balloons");
|
|
}
|
|
}
|