library/alloc/tests/lib.rs

   1 #![feature(allocator_api)]
   2 #![feature(assert_matches)]
   3 #![feature(box_syntax)]
   4 #![feature(cow_is_borrowed)]
   5 #![feature(const_cow_is_borrowed)]
   6 #![feature(drain_filter)]
   7 #![feature(exact_size_is_empty)]
   8 #![feature(new_uninit)]
   9 #![feature(pattern)]
  10 #![feature(trusted_len)]
  11 #![feature(try_reserve_kind)]
  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(binary_heap_retain)]
  18 #![feature(binary_heap_as_slice)]
  19 #![feature(inplace_iteration)]
  20 #![feature(iter_advance_by)]
  21 #![feature(slice_group_by)]
  22 #![feature(slice_partition_dedup)]
  23 #![feature(vec_spare_capacity)]
  24 #![feature(string_remove_matches)]
  25 #![feature(const_btree_new)]
  26 #![feature(const_default_impls)]
  27 #![feature(const_trait_impl)]
  28 #![feature(const_str_from_utf8)]
  29
  30 use std::collections::hash_map::DefaultHasher;
  31 use std::hash::{Hash, Hasher};
  32
  33 mod arc;
  34 mod binary_heap;
  35 mod borrow;
  36 mod boxed;
  37 mod btree_set_hash;
  38 mod const_fns;
  39 mod cow_str;
  40 mod fmt;
  41 mod heap;
  42 mod linked_list;
  43 mod rc;
  44 mod slice;
  45 mod str;
  46 mod string;
  47 mod vec;
  48 mod vec_deque;
  49
  50 fn hash<T: Hash>(t: &T) -> u64 {
  51     let mut s = DefaultHasher::new();
  52     t.hash(&mut s);
  53     s.finish()
  54 }
  55
  56 // FIXME: Instantiated functions with i128 in the signature is not supported in Emscripten.
  57 // See https://github.com/kripken/emscripten-fastcomp/issues/169
  58 #[cfg(not(target_os = "emscripten"))]
  59 #[test]
  60 fn test_boxed_hasher() {
  61     let ordinary_hash = hash(&5u32);
  62
  63     let mut hasher_1 = Box::new(DefaultHasher::new());
  64     5u32.hash(&mut hasher_1);
  65     assert_eq!(ordinary_hash, hasher_1.finish());
  66
  67     let mut hasher_2 = Box::new(DefaultHasher::new()) as Box<dyn Hasher>;
  68     5u32.hash(&mut hasher_2);
  69     assert_eq!(ordinary_hash, hasher_2.finish());
  70 }