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buf: impl size_hint for str types + reorg tests (#1012)

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This commit is contained in:
Carl Lerche
2019-03-28 14:02:45 -07:00
committed by GitHub
parent 03859a7dcd
commit a99b8e2e0b
8 changed files with 279 additions and 219 deletions
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tokio-buf/tests/buf_stream.rs
+4 -63
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@@ -1,66 +1,7 @@
extern crate bytes;
extern crate futures;
extern crate tokio_buf;
use bytes::Buf;
use futures::Async::*;
use tokio_buf::{BufStream, SizeHint};
use tokio_buf::BufStream;
#[macro_use]
mod support;
// ===== test `SizeHint` =====
#[test]
fn size_hint() {
let hint = SizeHint::new();
assert_eq!(hint.lower(), 0);
assert!(hint.upper().is_none());
let mut hint = SizeHint::new();
hint.set_lower(100);
assert_eq!(hint.lower(), 100);
assert!(hint.upper().is_none());
let mut hint = SizeHint::new();
hint.set_upper(200);
assert_eq!(hint.lower(), 0);
assert_eq!(hint.upper(), Some(200));
let mut hint = SizeHint::new();
hint.set_lower(100);
hint.set_upper(100);
assert_eq!(hint.lower(), 100);
assert_eq!(hint.upper(), Some(100));
}
#[test]
#[should_panic]
fn size_hint_lower_bigger_than_upper() {
let mut hint = SizeHint::new();
hint.set_upper(100);
hint.set_lower(200);
}
#[test]
#[should_panic]
fn size_hint_upper_less_than_lower() {
let mut hint = SizeHint::new();
hint.set_lower(200);
hint.set_upper(100);
}
// ===== BufStream impelmentations for misc types =====
#[test]
fn str_buf_stream() {
let mut bs = "hello world".to_string();
assert_buf_eq!(bs.poll_buf(), "hello world");
assert!(bs.is_empty());
assert_none!(bs.poll_buf());
let mut bs = "hello world";
assert_buf_eq!(bs.poll_buf(), "hello world");
assert!(bs.is_empty());
assert_none!(bs.poll_buf());
}
// Ensures that `BufStream` can be a trait object
#[allow(dead_code)]
fn obj(_: &mut BufStream<Item = u32, Error = ()>) {}