Add top-level tests for futures 0.2 integration (#231)

tests/echo2.rs

@@ -0,0 +1,53 @@
+#![cfg(feature = "unstable-futures")]
+
+// This test is the same as `echo.rs`, but ported to futures 0.2
+
+extern crate env_logger;
+extern crate futures2;
+extern crate tokio;
+extern crate tokio_io;
+
+use std::io::{Read, Write};
+use std::net::TcpStream;
+use std::thread;
+
+use futures2::prelude::*;
+use futures2::executor::block_on;
+use tokio::net::TcpListener;
+
+macro_rules! t {
+    ($e:expr) => (match $e {
+        Ok(e) => e,
+        Err(e) => panic!("{} failed with {:?}", stringify!($e), e),
+    })
+}
+
+#[test]
+fn echo_server() {
+    drop(env_logger::init());
+
+    let srv = t!(TcpListener::bind(&t!("127.0.0.1:0".parse())));
+    let addr = t!(srv.local_addr());
+
+    let msg = "foo bar baz";
+    let t = thread::spawn(move || {
+        let mut s = TcpStream::connect(&addr).unwrap();
+
+        for _i in 0..1024 {
+            assert_eq!(t!(s.write(msg.as_bytes())), msg.len());
+            let mut buf = [0; 1024];
+            assert_eq!(t!(s.read(&mut buf)), msg.len());
+            assert_eq!(&buf[..msg.len()], msg.as_bytes());
+        }
+    });
+
+    let clients = srv.incoming();
+    let client = clients.into_future().map(|e| e.0.unwrap()).map_err(|e| e.0);
+    let halves = client.map(|s| s.split());
+    let copied = halves.and_then(|(a, b)| a.copy_into(b));
+
+    let (amt, _, _) = t!(block_on(copied));
+    t.join().unwrap();
+
+    assert_eq!(amt, msg.len() as u64 * 1024);
+}