From 14803e66399d4f5f6377c487b50cff2565aeaea5 Mon Sep 17 00:00:00 2001
From: Oleksandr Babak <alexanderbabak@proton.me>
Date: Thu, 15 May 2025 14:04:25 +0200
Subject: [PATCH] chore: compile fail tests to assert that the future returned
 by `wait_until` is *not* `Unpin`

---
 rtic-common/src/wait_queue.rs | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/rtic-common/src/wait_queue.rs b/rtic-common/src/wait_queue.rs
index de27710aeac..cd42fe2afc1 100644
--- a/rtic-common/src/wait_queue.rs
+++ b/rtic-common/src/wait_queue.rs
@@ -289,6 +289,24 @@ impl<T: core::fmt::Debug + Clone> Link<T> {
     }
 }
 
+/// Test that the future returned by `wait_until` is not `Unpin`.
+/// ```compile_fail
+/// fn test_unpin(list: &rtic_common::wait_queue::DoublyLinkedList<core::task::Waker>, cx: &mut core::task::Context) {
+///     let mut wait_until_future = list.wait_until(|| None::<()>);
+///     let pinned = core::pin::Pin::new(&mut wait_until_future);
+///     core::future::Future::poll(pinned, cx);
+///  }
+/// ```
+/// This test will ensure that previous test failed because of `pin`.
+/// ```
+/// fn test_unpin(list: &rtic_common::wait_queue::DoublyLinkedList<core::task::Waker>, cx: &mut core::task::Context) {
+///     let mut wait_until_future = list.wait_until(|| None::<()>);
+///     let pinned = core::pin::pin!(wait_until_future);
+///     core::future::Future::poll(pinned, cx);
+///  }
+/// ```
+mod compile_fail_test {}
+
 #[cfg(test)]
 mod tests {
     use super::*;