jemallocator/tests/usable_size.rs

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Rust
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extern crate jemallocator;
use jemallocator::Jemalloc;
#[global_allocator]
static A: Jemalloc = Jemalloc;
#[test]
fn smoke() {
let a = Box::new(3_u32);
assert!(unsafe { jemallocator::usable_size(&*a) } >= 4);
}