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#![warn(rust_2018_idioms)]
use bytes::buf::Buf;
use bytes::Bytes;
#[test]
fn long_take() {
// Tests that get a take with a size greater than the buffer length will not
// overrun the buffer. Regression test for #138.
let buf = b"hello world".take(100);
assert_eq!(11, buf.remaining());
assert_eq!(b"hello world", buf.chunk());
}
#[test]
fn take_copy_to_bytes() {
let mut abcd = Bytes::copy_from_slice(b"abcd");
let abcd_ptr = abcd.as_ptr();
let mut take = (&mut abcd).take(2);
let a = take.copy_to_bytes(1);
assert_eq!(Bytes::copy_from_slice(b"a"), a);
// assert `to_bytes` did not allocate
assert_eq!(abcd_ptr, a.as_ptr());
assert_eq!(Bytes::copy_from_slice(b"bcd"), abcd);
}
#[test]
#[should_panic]
fn take_copy_to_bytes_panics() {
let abcd = Bytes::copy_from_slice(b"abcd");
abcd.take(2).copy_to_bytes(3);
}
#[cfg(feature = "std")]
#[test]
fn take_chunks_vectored() {
fn chain() -> impl Buf {
Bytes::from([1, 2, 3].to_vec()).chain(Bytes::from([4, 5, 6].to_vec()))
}
{
let mut dst = [std::io::IoSlice::new(&[]); 2];
let take = chain().take(0);
assert_eq!(take.chunks_vectored(&mut dst), 0);
}
{
let mut dst = [std::io::IoSlice::new(&[]); 2];
let take = chain().take(1);
assert_eq!(take.chunks_vectored(&mut dst), 1);
assert_eq!(&*dst[0], &[1]);
}
{
let mut dst = [std::io::IoSlice::new(&[]); 2];
let take = chain().take(3);
assert_eq!(take.chunks_vectored(&mut dst), 1);
assert_eq!(&*dst[0], &[1, 2, 3]);
}
{
let mut dst = [std::io::IoSlice::new(&[]); 2];
let take = chain().take(4);
assert_eq!(take.chunks_vectored(&mut dst), 2);
assert_eq!(&*dst[0], &[1, 2, 3]);
assert_eq!(&*dst[1], &[4]);
}
{
let mut dst = [std::io::IoSlice::new(&[]); 2];
let take = chain().take(6);
assert_eq!(take.chunks_vectored(&mut dst), 2);
assert_eq!(&*dst[0], &[1, 2, 3]);
assert_eq!(&*dst[1], &[4, 5, 6]);
}
{
let mut dst = [std::io::IoSlice::new(&[]); 2];
let take = chain().take(7);
assert_eq!(take.chunks_vectored(&mut dst), 2);
assert_eq!(&*dst[0], &[1, 2, 3]);
assert_eq!(&*dst[1], &[4, 5, 6]);
}
}
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