mirror of
https://github.com/rust-lang/rustlings.git
synced 2024-12-12 11:14:55 +02:00
72aaa15e6a
The test description says "at least five types of fruit", but the test itself is checking for exactly five types of fruit, which was a bit misleading for newcomers like me :) A simple change from "==" to ">=" should do the trick and successfully check for the "at least" condition.
82 lines
2.1 KiB
Rust
82 lines
2.1 KiB
Rust
// hashmap2.rs
|
|
|
|
// A basket of fruits in the form of a hash map is given. The key
|
|
// represents the name of the fruit and the value represents how many
|
|
// of that particular fruit is in the basket. You have to put *MORE
|
|
// THAN 11* fruits in the basket. Three types of fruits - Apple (4),
|
|
// Mango (2) and Lychee (5) are already given in the basket. You are
|
|
// not allowed to insert any more of these fruits!
|
|
//
|
|
// Make me pass the tests!
|
|
//
|
|
// Execute the command `rustlings hint hashmap2` if you need
|
|
// hints.
|
|
|
|
// I AM NOT DONE
|
|
|
|
use std::collections::HashMap;
|
|
|
|
#[derive(Hash, PartialEq, Eq)]
|
|
enum Fruit {
|
|
Apple,
|
|
Banana,
|
|
Mango,
|
|
Lychee,
|
|
Pineapple,
|
|
}
|
|
|
|
fn fruit_basket(basket: &mut HashMap<Fruit, u32>) {
|
|
let fruit_kinds = vec![
|
|
Fruit::Apple,
|
|
Fruit::Banana,
|
|
Fruit::Mango,
|
|
Fruit::Lychee,
|
|
Fruit::Pineapple,
|
|
];
|
|
|
|
for fruit in fruit_kinds {
|
|
// TODO: Put new fruits if not already present. Note that you
|
|
// are not allowed to put any type of fruit that's already
|
|
// present!
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
|
|
fn get_fruit_basket() -> HashMap<Fruit, u32> {
|
|
let mut basket = HashMap::<Fruit, u32>::new();
|
|
basket.insert(Fruit::Apple, 4);
|
|
basket.insert(Fruit::Mango, 2);
|
|
basket.insert(Fruit::Lychee, 5);
|
|
|
|
basket
|
|
}
|
|
|
|
#[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);
|
|
}
|
|
}
|