1 files changed, 46 insertions, 0 deletions

diff --git a/src/libs/dutil/test/DUtilUnitTest/ApupUtilTests.cpp b/src/libs/dutil/test/DUtilUnitTest/ApupUtilTests.cpp
new file mode 100644
index 00000000..30a45f5a
--- /dev/null
+++ b/src/libs/dutil/test/DUtilUnitTest/ApupUtilTests.cpp
@@ -0,0 +1,46 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
+
+using namespace System;
+using namespace Xunit;
+using namespace WixBuildTools::TestSupport;
+
+namespace DutilTests
+{
+    public ref class ApupUtil
+    {
+    public:
+        [Fact]
+        void AllocChainFromAtomSortsDescending()
+        {
+            HRESULT hr = S_OK;
+            ATOM_FEED* pFeed = NULL;
+            APPLICATION_UPDATE_CHAIN* pChain = NULL;
+
+            DutilInitialize(&DutilTestTraceError);
+
+            try
+            {
+                XmlInitialize();
+                NativeAssert::Succeeded(hr, "Failed to initialize Xml.");
+
+                pin_ptr<const wchar_t> feedFilePath = PtrToStringChars(TestData::Get("TestData", "ApupUtilTests", "FeedBv2.0.xml"));
+                hr = AtomParseFromFile(feedFilePath, &pFeed);
+                NativeAssert::Succeeded(hr, "Failed to parse feed: {0}", feedFilePath);
+
+                hr = ApupAllocChainFromAtom(pFeed, &pChain);
+                NativeAssert::Succeeded(hr, "Failed to get chain from feed.");
+
+                Assert::Equal(3ul, pChain->cEntries);
+                NativeAssert::StringEqual(L"Bundle v2.0", pChain->rgEntries[0].wzTitle);
+                NativeAssert::StringEqual(L"Bundle v1.0", pChain->rgEntries[1].wzTitle);
+                NativeAssert::StringEqual(L"Bundle v1.0-preview", pChain->rgEntries[2].wzTitle);
+            }
+            finally
+            {
+                DutilUninitialize();
+            }
+        }
+    };
+}