32 lines
987 B
Rust
32 lines
987 B
Rust
use std::collections::{self, HashMap};
|
|
use std::hash::{BuildHasherDefault, BuildHasher};
|
|
|
|
fn test_map<S: BuildHasher>(mut map: HashMap<i32, i32, S>) {
|
|
map.insert(0, 0);
|
|
assert_eq!(map.values().fold(0, |x, y| x+y), 0);
|
|
|
|
let num = 25;
|
|
for i in 1..num {
|
|
map.insert(i, i);
|
|
}
|
|
assert_eq!(map.values().fold(0, |x, y| x+y), num*(num-1)/2); // check the right things are in the table now
|
|
|
|
// Inserting again replaces the existing entries
|
|
for i in 0..num {
|
|
map.insert(i, num-1-i);
|
|
}
|
|
assert_eq!(map.values().fold(0, |x, y| x+y), num*(num-1)/2);
|
|
|
|
// TODO: Test Entry API, Iterators, ...
|
|
|
|
}
|
|
|
|
fn main() {
|
|
if cfg!(target_os = "macos") { // TODO: Implement libstd HashMap seeding for macOS (https://github.com/rust-lang/miri/issues/686).
|
|
// Until then, use a deterministic map.
|
|
test_map::<BuildHasherDefault<collections::hash_map::DefaultHasher>>(HashMap::default());
|
|
} else {
|
|
test_map(HashMap::new());
|
|
}
|
|
}
|