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