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rustlings/solutions/03_if/if3.rs

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2024-05-22 09:54:35 -04:00
fn animal_habitat(animal: &str) -> &str {
let identifier = if animal == "crab" {
1
} else if animal == "gopher" {
2
} else if animal == "snake" {
3
} else {
// Any unused identifier.
4
};
// Instead of such an identifier, you would use an enum in Rust.
// But we didn't get into enums yet.
if identifier == 1 {
"Beach"
} else if identifier == 2 {
"Burrow"
} else if identifier == 3 {
"Desert"
} else {
"Unknown"
}
}
fn main() {
// You can optionally experiment here.
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn gopher_lives_in_burrow() {
assert_eq!(animal_habitat("gopher"), "Burrow")
}
#[test]
fn snake_lives_in_desert() {
assert_eq!(animal_habitat("snake"), "Desert")
}
#[test]
fn crab_lives_on_beach() {
assert_eq!(animal_habitat("crab"), "Beach")
}
#[test]
fn unknown_animal() {
assert_eq!(animal_habitat("dinosaur"), "Unknown")
}
}