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