fix(core): Poll TimeoutLayer::sleep once to make sure timer registered

* feat(test): Cover the test for list timeout

Signed-off-by: Xuanwo <github@xuanwo.io>

* Fix

Signed-off-by: Xuanwo <github@xuanwo.io>

---------

Signed-off-by: Xuanwo <github@xuanwo.io>

core/src/layers/timeout.rs

@@ -288,22 +288,21 @@ impl<R> TimeoutWrapper<R> {
 
     #[inline]
     fn poll_timeout(&mut self, cx: &mut Context<'_>, op: &'static str) -> Result<()> {
-        if let Some(sleep) = self.sleep.as_mut() {
-            match sleep.as_mut().poll(cx) {
-                Poll::Pending => Ok(()),
-                Poll::Ready(_) => {
-                    self.sleep = None;
-                    Err(
-                        Error::new(ErrorKind::Unexpected, "io operation timeout reached")
-                            .with_operation(op)
-                            .with_context("io_timeout", self.timeout.as_secs_f64().to_string())
-                            .set_temporary(),
-                    )
-                }
+        let sleep = self
+            .sleep
+            .get_or_insert_with(|| Box::pin(tokio::time::sleep(self.timeout)));
+
+        match sleep.as_mut().poll(cx) {
+            Poll::Pending => Ok(()),
+            Poll::Ready(_) => {
+                self.sleep = None;
+                Err(
+                    Error::new(ErrorKind::Unexpected, "io operation timeout reached")
+                        .with_operation(op)
+                        .with_context("io_timeout", self.timeout.as_secs_f64().to_string())
+                        .set_temporary(),
+                )
             }
-        } else {
-            self.sleep = Some(Box::pin(tokio::time::sleep(self.timeout)));
-            Ok(())
         }
     }
 }
@@ -380,6 +379,7 @@ mod tests {
 
     use async_trait::async_trait;
     use bytes::Bytes;
+    use futures::StreamExt;
     use tokio::time::sleep;
     use tokio::time::timeout;
 
@@ -397,7 +397,7 @@ mod tests {
     impl Accessor for MockService {
         type Reader = MockReader;
         type Writer = ();
-        type Lister = ();
+        type Lister = MockLister;
         type BlockingReader = ();
         type BlockingWriter = ();
         type BlockingLister = ();
@@ -424,6 +424,10 @@ mod tests {
 
             Ok(RpDelete::default())
         }
+
+        async fn list(&self, _: &str, _: OpList) -> Result<(RpList, Self::Lister)> {
+            Ok((RpList::default(), MockLister))
+        }
     }
 
     #[derive(Debug, Clone, Default)]
@@ -443,6 +447,15 @@ mod tests {
         }
     }
 
+    #[derive(Debug, Clone, Default)]
+    struct MockLister;
+
+    impl oio::List for MockLister {
+        fn poll_next(&mut self, _: &mut Context<'_>) -> Poll<Result<Option<oio::Entry>>> {
+            Poll::Pending
+        }
+    }
+
     #[tokio::test]
     async fn test_operation_timeout() {
         let acc = Arc::new(TypeEraseLayer.layer(MockService)) as FusedAccessor;
@@ -468,18 +481,50 @@ mod tests {
         let op = Operator::from_inner(acc)
             .layer(TimeoutLayer::new().with_io_timeout(Duration::from_secs(1)));
 
-        let fut = async {
-            let mut reader = op.reader("test").await.unwrap();
+        let mut reader = op.reader("test").await.unwrap();
 
-            let res = reader.read(&mut [0; 4]).await;
-            assert!(res.is_err());
-            let err = res.unwrap_err();
-            assert_eq!(err.kind(), ErrorKind::Unexpected);
-            assert!(err.to_string().contains("timeout"))
-        };
+        let res = reader.read(&mut [0; 4]).await;
+        assert!(res.is_err());
+        let err = res.unwrap_err();
+        assert_eq!(err.kind(), ErrorKind::Unexpected);
+        assert!(err.to_string().contains("timeout"))
+    }
 
-        timeout(Duration::from_secs(2), fut)
+    #[tokio::test]
+    async fn test_list_timeout() {
+        let acc = Arc::new(TypeEraseLayer.layer(MockService)) as FusedAccessor;
+        let op = Operator::from_inner(acc).layer(
+            TimeoutLayer::new()
+                .with_timeout(Duration::from_secs(1))
+                .with_io_timeout(Duration::from_secs(1)),
+        );
+
+        let mut lister = op.lister("test").await.unwrap();
+
+        let res = lister.next().await.unwrap();
+        assert!(res.is_err());
+        let err = res.unwrap_err();
+        assert_eq!(err.kind(), ErrorKind::Unexpected);
+        assert!(err.to_string().contains("timeout"))
+    }
+
+    #[tokio::test]
+    async fn test_list_timeout_raw() {
+        let acc = MockService;
+        let timeout_layer = TimeoutLayer::new()
+            .with_timeout(Duration::from_secs(1))
+            .with_io_timeout(Duration::from_secs(1));
+        let timeout_acc = timeout_layer.layer(acc);
+
+        let (_, mut lister) = Accessor::list(&timeout_acc, "test", OpList::default())
             .await
-            .expect("this test should not exceed 2 seconds")
+            .unwrap();
+
+        use oio::ListExt;
+        let res = lister.next().await;
+        assert!(res.is_err());
+        let err = res.unwrap_err();
+        assert_eq!(err.kind(), ErrorKind::Unexpected);
+        assert!(err.to_string().contains("timeout"));
     }
 }