io: move into `tokio` crate (#1691)

A step towards collapsing Tokio sub crates into a single `tokio`
crate (#1318).

The `io` implementation is now provided by the main `tokio` crate.
Functionality can be opted out of by using the various net related
feature flags.

1 files changed, 15 insertions, 0 deletions

diff --git a/tokio/tests/io_take.rs b/tokio/tests/io_take.rs
new file mode 100644
index 00000000..7b3363e0
--- /dev/null
+++ b/tokio/tests/io_take.rs
@@ -0,0 +1,15 @@
+#![warn(rust_2018_idioms)]
+
+use tokio::io::AsyncReadExt;
+use tokio_test::assert_ok;
+
+#[tokio::test]
+async fn take() {
+    let mut buf = [0; 6];
+    let rd: &[u8] = b"hello world";
+
+    let mut rd = rd.take(4);
+    let n = assert_ok!(rd.read(&mut buf).await);
+    assert_eq!(n, 4);
+    assert_eq!(&buf, &b"hell\0\0"[..]);
+}