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rustlings/exercises/09_strings/strings3.rs

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fn trim_me(input: &str) -> &str {
// TODO: Remove whitespace from both ends of a string.
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}
fn compose_me(input: &str) -> String {
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// TODO: Add " world!" to the string! There are multiple ways to do this.
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}
fn replace_me(input: &str) -> String {
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// TODO: Replace "cars" in the string with "balloons".
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}
fn main() {
// You can optionally experiment here.
}
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#[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() {
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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",
);
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}
}