From f2bb81d6113d066d44ac2078320836d076fc9d36 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Fri, 23 Jan 2026 16:42:44 +0000
Subject: [PATCH] Add async versions of archive iteration regression tests

- Added Archive_Iteration_DoesNotBreak_WhenFlushThrows_Deflate_Async
- Added Archive_Iteration_DoesNotBreak_WhenFlushThrows_LZMA_Async
- Both async tests mirror the sync versions and pass successfully

Co-authored-by: adamhathcock <527620+adamhathcock@users.noreply.github.com>
---
 .../Zip/ZipReaderAsyncTests.cs                | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/tests/SharpCompress.Test/Zip/ZipReaderAsyncTests.cs b/tests/SharpCompress.Test/Zip/ZipReaderAsyncTests.cs
index c4c5bb3a..aaa345ad 100644
--- a/tests/SharpCompress.Test/Zip/ZipReaderAsyncTests.cs
+++ b/tests/SharpCompress.Test/Zip/ZipReaderAsyncTests.cs
@@ -337,4 +337,52 @@ public class ZipReaderAsyncTests : ReaderTests
             }
         }
     }
+
+    [Fact]
+    public async ValueTask Archive_Iteration_DoesNotBreak_WhenFlushThrows_Deflate_Async()
+    {
+        // Regression test: since 0.41.0, archive iteration would silently break
+        // when the input stream throws NotSupportedException in Flush().
+        // Only the first entry would be returned, then iteration would stop without exception.
+        var path = Path.Combine(TEST_ARCHIVES_PATH, "Zip.deflate.dd.zip");
+        using var fileStream = File.OpenRead(path);
+        using Stream stream = new ThrowOnFlushStream(fileStream);
+        await using var reader = ReaderFactory.OpenAsyncReader(new AsyncOnlyStream(stream));
+
+        var count = 0;
+        while (await reader.MoveToNextEntryAsync())
+        {
+            if (!reader.Entry.IsDirectory)
+            {
+                count++;
+            }
+        }
+
+        // Should iterate through all entries, not just the first one
+        Assert.True(count > 1, $"Expected more than 1 entry, but got {count}");
+    }
+
+    [Fact]
+    public async ValueTask Archive_Iteration_DoesNotBreak_WhenFlushThrows_LZMA_Async()
+    {
+        // Regression test: since 0.41.0, archive iteration would silently break
+        // when the input stream throws NotSupportedException in Flush().
+        // Only the first entry would be returned, then iteration would stop without exception.
+        var path = Path.Combine(TEST_ARCHIVES_PATH, "Zip.lzma.dd.zip");
+        using var fileStream = File.OpenRead(path);
+        using Stream stream = new ThrowOnFlushStream(fileStream);
+        await using var reader = ReaderFactory.OpenAsyncReader(new AsyncOnlyStream(stream));
+
+        var count = 0;
+        while (await reader.MoveToNextEntryAsync())
+        {
+            if (!reader.Entry.IsDirectory)
+            {
+                count++;
+            }
+        }
+
+        // Should iterate through all entries, not just the first one
+        Assert.True(count > 1, $"Expected more than 1 entry, but got {count}");
+    }
 }