1 files changed, 24 insertions, 0 deletions
diff --git a/third_party/rust/tokio-util/tests/context.rs b/third_party/rust/tokio-util/tests/context.rs
new file mode 100644
index 0000000000..7510f36fd1
--- /dev/null
+++ b/third_party/rust/tokio-util/tests/context.rs
@@ -0,0 +1,24 @@
+#![cfg(feature = "rt")]
+#![warn(rust_2018_idioms)]
+
+use tokio::runtime::Builder;
+use tokio::time::*;
+use tokio_util::context::RuntimeExt;
+
+#[test]
+fn tokio_context_with_another_runtime() {
+    let rt1 = Builder::new_multi_thread()
+        .worker_threads(1)
+        // no timer!
+        .build()
+        .unwrap();
+    let rt2 = Builder::new_multi_thread()
+        .worker_threads(1)
+        .enable_all()
+        .build()
+        .unwrap();
+
+    // Without the `HandleExt.wrap()` there would be a panic because there is
+    // no timer running, since it would be referencing runtime r1.
+    let _ = rt1.block_on(rt2.wrap(async move { sleep(Duration::from_millis(2)).await }));
+}