+use std::slice;
+
+fn check_alloc<T: Alloc>(mut allocator: T) { unsafe {
+ let layout = Layout::from_size_align(20, 4).unwrap();
+ let a = allocator.alloc(layout).unwrap();
+ allocator.dealloc(a, layout);
+
+ let p1 = allocator.alloc_zeroed(layout).unwrap();
+
+ let p2 = allocator.realloc(p1, Layout::from_size_align(20, 4).unwrap(), 40).unwrap();
+ let slice = slice::from_raw_parts(p2.as_ptr(), 20);
+ assert_eq!(&slice, &[0_u8; 20]);
+
+ // old size == new size
+ let p3 = allocator.realloc(p2, Layout::from_size_align(40, 4).unwrap(), 40).unwrap();
+ let slice = slice::from_raw_parts(p3.as_ptr(), 20);
+ assert_eq!(&slice, &[0_u8; 20]);
+
+ // old size > new size
+ let p4 = allocator.realloc(p3, Layout::from_size_align(40, 4).unwrap(), 10).unwrap();
+ let slice = slice::from_raw_parts(p4.as_ptr(), 10);
+ assert_eq!(&slice, &[0_u8; 10]);
+
+ allocator.dealloc(p4, Layout::from_size_align(10, 4).unwrap());
+} }