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

src/executor/mod.rs

@@ -136,6 +136,9 @@ pub use tokio_executor::{Executor, DefaultExecutor, SpawnError};
 use futures::{Future, IntoFuture};
 use futures::future::{self, FutureResult};
 
+#[cfg(feature = "unstable-futures")]
+use futures2;
+
 /// Return value from the `spawn` function.
 ///
 /// Currently this value doesn't actually provide any functionality. However, it
@@ -205,6 +208,15 @@ where F: Future<Item = (), Error = ()> + 'static + Send
     Spawn(())
 }
 
+/// Like `spawn`, but compatible with futures 0.2
+#[cfg(feature = "unstable-futures")]
+pub fn spawn2<F>(f: F) -> Spawn
+    where F: futures2::Future<Item = (), Error = futures2::Never> + 'static + Send
+{
+    ::tokio_executor::spawn2(f);
+    Spawn(())
+}
+
 impl IntoFuture for Spawn {
     type Future = FutureResult<(), ()>;
     type Item = ();
@@ -214,3 +226,14 @@ impl IntoFuture for Spawn {
         future::ok(())
     }
 }
+
+#[cfg(feature = "unstable-futures")]
+impl futures2::IntoFuture for Spawn {
+    type Future = futures2::future::FutureResult<(), ()>;
+    type Item = ();
+    type Error = ();
+
+    fn into_future(self) -> Self::Future {
+        futures2::future::ok(())
+    }
+}