src/liballoc/tests/lib.rs

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