1 files changed, 43 insertions, 0 deletions
diff --git a/src/test/ui/lint/unused/unused-async.rs b/src/test/ui/lint/unused/unused-async.rs
new file mode 100644
index 000000000..7d17af115
--- /dev/null
+++ b/src/test/ui/lint/unused/unused-async.rs
@@ -0,0 +1,43 @@
+// edition:2018
+// run-pass
+#![allow(dead_code)]
+
+#[must_use]
+//~^ WARNING `must_use`
+async fn test() -> i32 {
+    1
+}
+
+
+struct Wowee {}
+
+impl Wowee {
+    #[must_use]
+    //~^ WARNING `must_use`
+    async fn test_method() -> i32 {
+        1
+    }
+}
+
+/* FIXME(guswynn) update this test when async-fn-in-traits works
+trait Doer {
+    #[must_use]
+    async fn test_trait_method() -> i32;
+    WARNING must_use
+    async fn test_other_trait() -> i32;
+}
+
+impl Doer for Wowee {
+    async fn test_trait_method() -> i32 {
+        1
+    }
+    #[must_use]
+    async fn test_other_trait() -> i32 {
+        WARNING must_use
+        1
+    }
+}
+*/
+
+fn main() {
+}