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