src/libcore/tests/mem.rs

   1 // Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 use core::mem::*;
  12
  13 #[test]
  14 fn size_of_basic() {
  15     assert_eq!(size_of::<u8>(), 1);
  16     assert_eq!(size_of::<u16>(), 2);
  17     assert_eq!(size_of::<u32>(), 4);
  18     assert_eq!(size_of::<u64>(), 8);
  19 }
  20
  21 #[test]
  22 #[cfg(target_pointer_width = "16")]
  23 fn size_of_16() {
  24     assert_eq!(size_of::<usize>(), 2);
  25     assert_eq!(size_of::<*const usize>(), 2);
  26 }
  27
  28 #[test]
  29 #[cfg(target_pointer_width = "32")]
  30 fn size_of_32() {
  31     assert_eq!(size_of::<usize>(), 4);
  32     assert_eq!(size_of::<*const usize>(), 4);
  33 }
  34
  35 #[test]
  36 #[cfg(target_pointer_width = "64")]
  37 fn size_of_64() {
  38     assert_eq!(size_of::<usize>(), 8);
  39     assert_eq!(size_of::<*const usize>(), 8);
  40 }
  41
  42 #[test]
  43 fn size_of_val_basic() {
  44     assert_eq!(size_of_val(&1u8), 1);
  45     assert_eq!(size_of_val(&1u16), 2);
  46     assert_eq!(size_of_val(&1u32), 4);
  47     assert_eq!(size_of_val(&1u64), 8);
  48 }
  49
  50 #[test]
  51 fn align_of_basic() {
  52     assert_eq!(align_of::<u8>(), 1);
  53     assert_eq!(align_of::<u16>(), 2);
  54     assert_eq!(align_of::<u32>(), 4);
  55 }
  56
  57 #[test]
  58 #[cfg(target_pointer_width = "16")]
  59 fn align_of_16() {
  60     assert_eq!(align_of::<usize>(), 2);
  61     assert_eq!(align_of::<*const usize>(), 2);
  62 }
  63
  64 #[test]
  65 #[cfg(target_pointer_width = "32")]
  66 fn align_of_32() {
  67     assert_eq!(align_of::<usize>(), 4);
  68     assert_eq!(align_of::<*const usize>(), 4);
  69 }
  70
  71 #[test]
  72 #[cfg(target_pointer_width = "64")]
  73 fn align_of_64() {
  74     assert_eq!(align_of::<usize>(), 8);
  75     assert_eq!(align_of::<*const usize>(), 8);
  76 }
  77
  78 #[test]
  79 fn align_of_val_basic() {
  80     assert_eq!(align_of_val(&1u8), 1);
  81     assert_eq!(align_of_val(&1u16), 2);
  82     assert_eq!(align_of_val(&1u32), 4);
  83 }
  84
  85 #[test]
  86 fn test_swap() {
  87     let mut x = 31337;
  88     let mut y = 42;
  89     swap(&mut x, &mut y);
  90     assert_eq!(x, 42);
  91     assert_eq!(y, 31337);
  92 }
  93
  94 #[test]
  95 fn test_replace() {
  96     let mut x = Some("test".to_string());
  97     let y = replace(&mut x, None);
  98     assert!(x.is_none());
  99     assert!(y.is_some());
 100 }
 101
 102 #[test]
 103 fn test_transmute_copy() {
 104     assert_eq!(1, unsafe { transmute_copy(&1) });
 105 }
 106
 107 #[test]
 108 fn test_transmute() {
 109     trait Foo { fn dummy(&self) { } }
 110     impl Foo for isize {}
 111
 112     let a = box 100isize as Box<Foo>;
 113     unsafe {
 114         let x: ::core::raw::TraitObject = transmute(a);
 115         assert!(*(x.data as *const isize) == 100);
 116         let _x: Box<Foo> = transmute(x);
 117     }
 118
 119     unsafe {
 120         assert_eq!(transmute::<_, Vec<u8>>("L".to_string()), [76]);
 121     }
 122 }
 123
 124 #[test]
 125 #[allow(dead_code)]
 126 fn test_discriminant_send_sync() {
 127     enum Regular {
 128         A,
 129         B(i32)
 130     }
 131     enum NotSendSync {
 132         A(*const i32)
 133     }
 134
 135     fn is_send_sync<T: Send + Sync>() { }
 136
 137     is_send_sync::<Discriminant<Regular>>();
 138     is_send_sync::<Discriminant<NotSendSync>>();
 139 }