29 lines
768 B
Rust
29 lines
768 B
Rust
// macOS needs FS access for its HashMap:
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// compile-flags: -Zmiri-disable-isolation
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use std::collections::{self, HashMap};
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use std::hash::{BuildHasherDefault, BuildHasher};
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fn test_map<S: BuildHasher>(mut map: HashMap<i32, i32, S>) {
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map.insert(0, 0);
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assert_eq!(map.values().fold(0, |x, y| x+y), 0);
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let num = 25;
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for i in 1..num {
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map.insert(i, i);
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}
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assert_eq!(map.values().fold(0, |x, y| x+y), num*(num-1)/2); // check the right things are in the table now
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// Inserting again replaces the existing entries
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for i in 0..num {
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map.insert(i, num-1-i);
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}
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assert_eq!(map.values().fold(0, |x, y| x+y), num*(num-1)/2);
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// TODO: Test Entry API, Iterators, ...
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}
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fn main() {
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test_map(HashMap::new());
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}
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