1 files changed, 39 insertions, 0 deletions

diff --git a/third_party/rust/futures-0.1.31/tests/fuse.rs b/third_party/rust/futures-0.1.31/tests/fuse.rs
new file mode 100644
index 0000000000..177d914e19
--- /dev/null
+++ b/third_party/rust/futures-0.1.31/tests/fuse.rs
@@ -0,0 +1,39 @@
+extern crate futures;
+
+use futures::prelude::*;
+use futures::future::ok;
+use futures::executor;
+
+mod support;
+use support::*;
+
+#[test]
+fn fuse() {
+    let mut future = executor::spawn(ok::<i32, u32>(2).fuse());
+    assert!(future.poll_future_notify(&notify_panic(), 0).unwrap().is_ready());
+    assert!(future.poll_future_notify(&notify_panic(), 0).unwrap().is_not_ready());
+}
+
+#[test]
+fn fuse_is_done() {
+    use futures::future::{Fuse, FutureResult};
+
+    struct Wrapped(Fuse<FutureResult<i32, u32>>);
+
+    impl Future for Wrapped {
+        type Item = ();
+        type Error = ();
+
+        fn poll(&mut self) -> Poll<(), ()> {
+            assert!(!self.0.is_done());
+            assert_eq!(self.0.poll().unwrap(), Async::Ready(2));
+            assert!(self.0.is_done());
+            assert_eq!(self.0.poll().unwrap(), Async::NotReady);
+            assert!(self.0.is_done());
+            
+            Ok(Async::Ready(()))            
+        }
+    }
+
+    assert!(Wrapped(ok::<i32, u32>(2).fuse()).wait().is_ok());
+}
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