1 files changed, 83 insertions, 0 deletions
diff --git a/vendor/futures/tests/future_try_flatten_stream.rs b/vendor/futures/tests/future_try_flatten_stream.rs
new file mode 100644
index 000000000..82ae1baf2
--- /dev/null
+++ b/vendor/futures/tests/future_try_flatten_stream.rs
@@ -0,0 +1,83 @@
+use futures::executor::block_on_stream;
+use futures::future::{err, ok, TryFutureExt};
+use futures::sink::Sink;
+use futures::stream::Stream;
+use futures::stream::{self, StreamExt};
+use futures::task::{Context, Poll};
+use std::marker::PhantomData;
+use std::pin::Pin;
+
+#[test]
+fn successful_future() {
+    let stream_items = vec![17, 19];
+    let future_of_a_stream = ok::<_, bool>(stream::iter(stream_items).map(Ok));
+
+    let stream = future_of_a_stream.try_flatten_stream();
+
+    let mut iter = block_on_stream(stream);
+    assert_eq!(Ok(17), iter.next().unwrap());
+    assert_eq!(Ok(19), iter.next().unwrap());
+    assert_eq!(None, iter.next());
+}
+
+#[test]
+fn failed_future() {
+    struct PanickingStream<T, E> {
+        _marker: PhantomData<(T, E)>,
+    }
+
+    impl<T, E> Stream for PanickingStream<T, E> {
+        type Item = Result<T, E>;
+
+        fn poll_next(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Option<Self::Item>> {
+            panic!()
+        }
+    }
+
+    let future_of_a_stream = err::<PanickingStream<bool, u32>, _>(10);
+    let stream = future_of_a_stream.try_flatten_stream();
+    let mut iter = block_on_stream(stream);
+    assert_eq!(Err(10), iter.next().unwrap());
+    assert_eq!(None, iter.next());
+}
+
+#[test]
+fn assert_impls() {
+    struct StreamSink<T, E, Item>(PhantomData<(T, E, Item)>);
+
+    impl<T, E, Item> Stream for StreamSink<T, E, Item> {
+        type Item = Result<T, E>;
+        fn poll_next(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Option<Self::Item>> {
+            panic!()
+        }
+    }
+
+    impl<T, E, Item> Sink<Item> for StreamSink<T, E, Item> {
+        type Error = E;
+        fn poll_ready(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
+            panic!()
+        }
+        fn start_send(self: Pin<&mut Self>, _: Item) -> Result<(), Self::Error> {
+            panic!()
+        }
+        fn poll_flush(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
+            panic!()
+        }
+        fn poll_close(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
+            panic!()
+        }
+    }
+
+    fn assert_stream<S: Stream>(_: &S) {}
+    fn assert_sink<S: Sink<Item>, Item>(_: &S) {}
+    fn assert_stream_sink<S: Stream + Sink<Item>, Item>(_: &S) {}
+
+    let s = ok(StreamSink::<(), (), ()>(PhantomData)).try_flatten_stream();
+    assert_stream(&s);
+    assert_sink(&s);
+    assert_stream_sink(&s);
+    let s = ok(StreamSink::<(), (), ()>(PhantomData)).flatten_sink();
+    assert_stream(&s);
+    assert_sink(&s);
+    assert_stream_sink(&s);
+}