library/alloc/tests/lib.rs

   1 #![feature(allocator_api)]
   2 #![feature(box_syntax)]
   3 #![feature(cow_is_borrowed)]
   4 #![feature(const_cow_is_borrowed)]
   5 #![feature(drain_filter)]
   6 #![feature(exact_size_is_empty)]
   7 #![feature(new_uninit)]
   8 #![feature(pattern)]
   9 #![feature(str_split_once)]
  10 #![feature(trusted_len)]
  11 #![feature(try_reserve)]
  12 #![feature(unboxed_closures)]
  13 #![feature(associated_type_bounds)]
  14 #![feature(binary_heap_into_iter_sorted)]
  15 #![feature(binary_heap_drain_sorted)]
  16 #![feature(slice_ptr_get)]
  17 #![feature(split_inclusive)]
  18 #![feature(binary_heap_retain)]
  19 #![feature(inplace_iteration)]
  20 #![feature(iter_map_while)]
  21 #![feature(int_bits_const)]
  22 #![feature(vecdeque_binary_search)]
  23 #![feature(slice_group_by)]
  24
  25 use std::collections::hash_map::DefaultHasher;
  26 use std::hash::{Hash, Hasher};
  27
  28 mod arc;
  29 mod binary_heap;
  30 mod borrow;
  31 mod boxed;
  32 mod btree_set_hash;
  33 mod cow_str;
  34 mod fmt;
  35 mod heap;
  36 mod linked_list;
  37 mod rc;
  38 mod slice;
  39 mod str;
  40 mod string;
  41 mod vec;
  42 mod vec_deque;
  43
  44 fn hash<T: Hash>(t: &T) -> u64 {
  45     let mut s = DefaultHasher::new();
  46     t.hash(&mut s);
  47     s.finish()
  48 }
  49
  50 // FIXME: Instantiated functions with i128 in the signature is not supported in Emscripten.
  51 // See https://github.com/kripken/emscripten-fastcomp/issues/169
  52 #[cfg(not(target_os = "emscripten"))]
  53 #[test]
  54 fn test_boxed_hasher() {
  55     let ordinary_hash = hash(&5u32);
  56
  57     let mut hasher_1 = Box::new(DefaultHasher::new());
  58     5u32.hash(&mut hasher_1);
  59     assert_eq!(ordinary_hash, hasher_1.finish());
  60
  61     let mut hasher_2 = Box::new(DefaultHasher::new()) as Box<dyn Hasher>;
  62     5u32.hash(&mut hasher_2);
  63     assert_eq!(ordinary_hash, hasher_2.finish());
  64 }