library/alloc/tests/lib.rs

   1 #![feature(allocator_api)]
   2 #![feature(box_syntax)]
   3 #![feature(cow_is_borrowed)]
   4 #![feature(drain_filter)]
   5 #![feature(exact_size_is_empty)]
   6 #![feature(new_uninit)]
   7 #![feature(pattern)]
   8 #![feature(str_split_once)]
   9 #![feature(trusted_len)]
  10 #![feature(try_reserve)]
  11 #![feature(unboxed_closures)]
  12 #![feature(associated_type_bounds)]
  13 #![feature(binary_heap_into_iter_sorted)]
  14 #![feature(binary_heap_drain_sorted)]
  15 #![feature(slice_ptr_get)]
  16 #![feature(split_inclusive)]
  17 #![feature(binary_heap_retain)]
  18 #![feature(deque_range)]
  19 #![feature(inplace_iteration)]
  20 #![feature(iter_map_while)]
  21
  22 use std::collections::hash_map::DefaultHasher;
  23 use std::hash::{Hash, Hasher};
  24
  25 mod arc;
  26 mod binary_heap;
  27 mod borrow;
  28 mod boxed;
  29 mod btree_set_hash;
  30 mod cow_str;
  31 mod fmt;
  32 mod heap;
  33 mod linked_list;
  34 mod rc;
  35 mod slice;
  36 mod str;
  37 mod string;
  38 mod vec;
  39 mod vec_deque;
  40
  41 fn hash<T: Hash>(t: &T) -> u64 {
  42     let mut s = DefaultHasher::new();
  43     t.hash(&mut s);
  44     s.finish()
  45 }
  46
  47 // FIXME: Instantiated functions with i128 in the signature is not supported in Emscripten.
  48 // See https://github.com/kripken/emscripten-fastcomp/issues/169
  49 #[cfg(not(target_os = "emscripten"))]
  50 #[test]
  51 fn test_boxed_hasher() {
  52     let ordinary_hash = hash(&5u32);
  53
  54     let mut hasher_1 = Box::new(DefaultHasher::new());
  55     5u32.hash(&mut hasher_1);
  56     assert_eq!(ordinary_hash, hasher_1.finish());
  57
  58     let mut hasher_2 = Box::new(DefaultHasher::new()) as Box<dyn Hasher>;
  59     5u32.hash(&mut hasher_2);
  60     assert_eq!(ordinary_hash, hasher_2.finish());
  61 }