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Rollup merge of #146481 - ferrocene:pvdrz/improve-hash-coverage, r=jhpratt

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Improve `core::hash` coverage

This PR improves the `core::hash` coverage by adding a new test to `coretests` and extending one of the existing tests to use 128-bit integers

r? libs
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Jana Dönszelmann 2025-09-13 02:40:46 +02:00 • committed by GitHub
commit ec0f3bd2ed
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1 changed files with 13 additions and 0 deletions
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13
library/coretests/tests/hash/mod.rs
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@ -53,12 +53,14 @@ fn test_writer_hasher() {
assert_eq!(hash(&5_u16), 5);
assert_eq!(hash(&5_u32), 5);
assert_eq!(hash(&5_u64), 5);
assert_eq!(hash(&5_u128), 5);
assert_eq!(hash(&5_usize), 5);
assert_eq!(hash(&5_i8), 5);
assert_eq!(hash(&5_i16), 5);
assert_eq!(hash(&5_i32), 5);
assert_eq!(hash(&5_i64), 5);
assert_eq!(hash(&5_i128), 5);
assert_eq!(hash(&5_isize), 5);
assert_eq!(hash(&false), 0);
@ -85,6 +87,17 @@ fn test_writer_hasher() {
let ptr = ptr::without_provenance_mut::<i32>(5_usize);
assert_eq!(hash(&ptr), 5);
// Use a newtype to test the `Hash::hash_slice` default implementation.
struct Byte(u8);
impl Hash for Byte {
fn hash<H: Hasher>(&self, state: &mut H) {
state.write_u8(self.0)
}
}
assert_eq!(hash(&[Byte(b'a')]), 97 + 1);
if cfg!(miri) {
// Miri cannot hash pointers
return;