1 files changed, 61 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/large_futures.rs b/src/tools/clippy/tests/ui/large_futures.rs
new file mode 100644
index 000000000..4a8ba995d
--- /dev/null
+++ b/src/tools/clippy/tests/ui/large_futures.rs
@@ -0,0 +1,61 @@
+#![feature(generators)]
+#![warn(clippy::large_futures)]
+#![allow(clippy::future_not_send)]
+#![allow(clippy::manual_async_fn)]
+
+async fn big_fut(_arg: [u8; 1024 * 16]) {}
+
+async fn wait() {
+    let f = async {
+        big_fut([0u8; 1024 * 16]).await;
+    };
+    f.await
+}
+async fn calls_fut(fut: impl std::future::Future<Output = ()>) {
+    loop {
+        wait().await;
+        if true {
+            return fut.await;
+        } else {
+            wait().await;
+        }
+    }
+}
+
+pub async fn test() {
+    let fut = big_fut([0u8; 1024 * 16]);
+    foo().await;
+    calls_fut(fut).await;
+}
+
+pub fn foo() -> impl std::future::Future<Output = ()> {
+    async {
+        let x = [0i32; 1024 * 16];
+        async {}.await;
+        dbg!(x);
+    }
+}
+
+pub async fn lines() {
+    async {
+        let x = [0i32; 1024 * 16];
+        async {}.await;
+        println!("{:?}", x);
+    }
+    .await;
+}
+
+pub async fn macro_expn() {
+    macro_rules! macro_ {
+        () => {
+            async {
+                let x = [0i32; 1024 * 16];
+                async {}.await;
+                println!("macro: {:?}", x);
+            }
+        };
+    }
+    macro_!().await
+}
+
+fn main() {}