From: Stephen Toub <stoub@microsoft.com>
Date: Wed, 15 Feb 2023 16:13:50 +0000 (-0500)
Subject: Fix CancellationTokenSource_CancelAsync_AllCallbacksInvoked test (#82153)
X-Git-Tag: accepted/tizen/unified/riscv/20231226.055536~4005
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=db6a5f54e5ad61c28f53012bcb896ae226b517a7;p=platform%2Fupstream%2Fdotnet%2Fruntime.git

Fix CancellationTokenSource_CancelAsync_AllCallbacksInvoked test (#82153)

If the task internally queued by CancelAsync hasn't started yet by the time we block waiting for it, Wait could inline it and end up running it on the current thread.
---

diff --git a/src/libraries/System.Threading.Tasks/tests/CancellationTokenTests.cs b/src/libraries/System.Threading.Tasks/tests/CancellationTokenTests.cs
index b1be8a7..4d2c89b 100644
--- a/src/libraries/System.Threading.Tasks/tests/CancellationTokenTests.cs
+++ b/src/libraries/System.Threading.Tasks/tests/CancellationTokenTests.cs
@@ -1787,7 +1787,9 @@ namespace System.Threading.Tasks.Tests
             Task t = cts.CancelAsync();
             Assert.True(cts.IsCancellationRequested);
 
-            t.Wait(); // synchronously block to ensure this thread isn't reused
+            ((IAsyncResult)t).AsyncWaitHandle.WaitOne(); // synchronously block without inlining to ensure this thread isn't reused
+            t.Wait(); // propagate any exceptions
+
             Assert.Equal(Iters * (Iters + 1) / 2, sum);
         }