36 lines
1.0 KiB
Rust
36 lines
1.0 KiB
Rust
// compile-flags: -Zmiri-seed=0000000000000000
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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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if cfg!(target_os = "macos") { // TODO: Implement random number generation on OS X.
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// Until then, use a deterministic map.
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let map : HashMap<i32, i32, BuildHasherDefault<collections::hash_map::DefaultHasher>> = HashMap::default();
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test_map(map);
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} else {
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let map: HashMap<i32, i32> = HashMap::default();
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test_map(map);
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}
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}
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