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authorHunter Kvalevog <hunter@kvog.sh>2026-10-02 21:53:51 -0500
committerHunter Kvalevog <hunter@kvog.sh>2026-10-02 21:53:51 -0500
commit4dfc11d74ab02ac5765ae5d08fb750c91f4744b4 (patch)
tree17ba62056d6b691dd0217b0e8f1b3a5826dce0f6 /rustlings/exercises/11_hashmaps/hashmaps2.rs
parent02d8f1c62896576e1266553a56980eddbc2a88d7 (diff)
rustlings: move to rust/
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diff --git a/rustlings/exercises/11_hashmaps/hashmaps2.rs b/rustlings/exercises/11_hashmaps/hashmaps2.rs
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-// We're collecting different fruits to bake a delicious fruit cake. For this,
-// we have a basket, which we'll represent in the form of a hash map. The key
-// represents the name of each fruit we collect and the value represents how
-// many of that particular fruit we have collected. Three types of fruits -
-// Apple (4), Mango (2) and Lychee (5) are already in the basket hash map. You
-// must add fruit to the basket so that there is at least one of each kind and
-// more than 11 in total - we have a lot of mouths to feed. You are not allowed
-// to insert any more of the fruits that are already in the basket (Apple,
-// Mango, and Lychee).
-
-use std::collections::HashMap;
-
-#[derive(Hash, PartialEq, Eq, Debug)]
-enum Fruit {
- Apple,
- Banana,
- Mango,
- Lychee,
- Pineapple,
-}
-
-fn fruit_basket(basket: &mut HashMap<Fruit, u32>) {
- let fruit_kinds = [
- Fruit::Apple,
- Fruit::Banana,
- Fruit::Mango,
- Fruit::Lychee,
- Fruit::Pineapple,
- ];
-
- for fruit in fruit_kinds {
- // This works just fine, but clippy doesn't like how readable and obvious the code is
- // if !basket.contains_key(&fruit) {
- // basket.insert(fruit, 10);
- // }
- basket.entry(fruit).or_insert(10);
- }
-}
-
-fn main() {
- // You can optionally experiment here.
-}
-
-#[cfg(test)]
-mod tests {
- use super::*;
-
- // Don't modify this function!
- fn get_fruit_basket() -> HashMap<Fruit, u32> {
- let content = [(Fruit::Apple, 4), (Fruit::Mango, 2), (Fruit::Lychee, 5)];
- HashMap::from_iter(content)
- }
-
- #[test]
- fn test_given_fruits_are_not_modified() {
- let mut basket = get_fruit_basket();
- fruit_basket(&mut basket);
- assert_eq!(*basket.get(&Fruit::Apple).unwrap(), 4);
- assert_eq!(*basket.get(&Fruit::Mango).unwrap(), 2);
- assert_eq!(*basket.get(&Fruit::Lychee).unwrap(), 5);
- }
-
- #[test]
- fn at_least_five_types_of_fruits() {
- let mut basket = get_fruit_basket();
- fruit_basket(&mut basket);
- let count_fruit_kinds = basket.len();
- assert!(count_fruit_kinds >= 5);
- }
-
- #[test]
- fn greater_than_eleven_fruits() {
- let mut basket = get_fruit_basket();
- fruit_basket(&mut basket);
- let count = basket.values().sum::<u32>();
- assert!(count > 11);
- }
-
- #[test]
- fn all_fruit_types_in_basket() {
- let fruit_kinds = [
- Fruit::Apple,
- Fruit::Banana,
- Fruit::Mango,
- Fruit::Lychee,
- Fruit::Pineapple,
- ];
-
- let mut basket = get_fruit_basket();
- fruit_basket(&mut basket);
-
- for fruit_kind in fruit_kinds {
- let Some(amount) = basket.get(&fruit_kind) else {
- panic!("Fruit kind {fruit_kind:?} was not found in basket");
- };
- assert!(*amount > 0);
- }
- }
-}