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, 20 insertions, 0 deletions

diff --git a/tokio/tests/io_lines.rs b/tokio/tests/io_lines.rs
new file mode 100644
index 00000000..e85fbff7
--- /dev/null
+++ b/tokio/tests/io_lines.rs
@@ -0,0 +1,20 @@
+#![warn(rust_2018_idioms)]
+
+use tokio::io::AsyncBufReadExt;
+use tokio_test::assert_ok;
+
+use futures_util::StreamExt;
+
+#[tokio::test]
+async fn lines() {
+    let rd: &[u8] = b"hello\r\nworld\n\n";
+    let mut st = rd.lines();
+
+    let b = assert_ok!(st.next().await.unwrap());
+    assert_eq!(b, "hello");
+    let b = assert_ok!(st.next().await.unwrap());
+    assert_eq!(b, "world");
+    let b = assert_ok!(st.next().await.unwrap());
+    assert_eq!(b, "");
+    assert!(st.next().await.is_none());
+}