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-rw-r--r--third_party/rust/futures/tests/future_select_all.rs25
1 files changed, 25 insertions, 0 deletions
diff --git a/third_party/rust/futures/tests/future_select_all.rs b/third_party/rust/futures/tests/future_select_all.rs
new file mode 100644
index 0000000000..299b479044
--- /dev/null
+++ b/third_party/rust/futures/tests/future_select_all.rs
@@ -0,0 +1,25 @@
+use futures::executor::block_on;
+use futures::future::{ready, select_all};
+use std::collections::HashSet;
+
+#[test]
+fn smoke() {
+ let v = vec![ready(1), ready(2), ready(3)];
+
+ let mut c = vec![1, 2, 3].into_iter().collect::<HashSet<_>>();
+
+ let (i, idx, v) = block_on(select_all(v));
+ assert!(c.remove(&i));
+ assert_eq!(idx, 0);
+
+ let (i, idx, v) = block_on(select_all(v));
+ assert!(c.remove(&i));
+ assert_eq!(idx, 0);
+
+ let (i, idx, v) = block_on(select_all(v));
+ assert!(c.remove(&i));
+ assert_eq!(idx, 0);
+
+ assert!(c.is_empty());
+ assert!(v.is_empty());
+}