chore: use ready macro from futures-core (#1300)

tokio-test/src/io.rs

@@ -20,6 +20,7 @@ use std::task::{self, Poll, Waker};
 use std::time::{Duration, Instant};
 use std::{cmp, io};
 
+use futures_core::ready;
 use tokio_io::{AsyncRead, AsyncWrite};
 use tokio_sync::mpsc;
 use tokio_timer::{clock, timer, Delay};

tokio-test/src/lib.rs

@@ -20,15 +20,6 @@
 //! assert_ready!(fut.poll());
 //! ```
 
-macro_rules! ready {
-    ($e:expr) => {
-        match $e {
-            ::std::task::Poll::Ready(t) => t,
-            ::std::task::Poll::Pending => return ::std::task::Poll::Pending,
-        }
-    };
-}
-
 pub mod clock;
 pub mod io;
 mod macros;