1 files changed, 47 insertions, 0 deletions

diff --git a/src/internal/WixBuildTools.TestSupport/WixAssert.cs b/src/internal/WixBuildTools.TestSupport/WixAssert.cs
new file mode 100644
index 00000000..5638a787
--- /dev/null
+++ b/src/internal/WixBuildTools.TestSupport/WixAssert.cs
@@ -0,0 +1,47 @@
+// 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.
+
+namespace WixBuildTools.TestSupport
+{
+    using System;
+    using System.Linq;
+    using System.Xml.Linq;
+    using Xunit;
+
+    public class WixAssert : Assert
+    {
+        public static void CompareLineByLine(string[] expectedLines, string[] actualLines)
+        {
+            for (var i = 0; i < expectedLines.Length; ++i)
+            {
+                Assert.True(actualLines.Length > i, $"{i}: expectedLines longer than actualLines");
+                Assert.Equal($"{i}: {expectedLines[i]}", $"{i}: {actualLines[i]}");
+            }
+
+            Assert.True(expectedLines.Length == actualLines.Length, "actualLines longer than expectedLines");
+        }
+
+        public static void CompareXml(XContainer xExpected, XContainer xActual)
+        {
+            var expecteds = xExpected.Descendants().Select(x => $"{x.Name.LocalName}:{String.Join(",", x.Attributes().OrderBy(a => a.Name.LocalName).Select(a => $"{a.Name.LocalName}={a.Value}"))}");
+            var actuals = xActual.Descendants().Select(x => $"{x.Name.LocalName}:{String.Join(",", x.Attributes().OrderBy(a => a.Name.LocalName).Select(a => $"{a.Name.LocalName}={a.Value}"))}");
+
+            CompareLineByLine(expecteds.OrderBy(s => s).ToArray(), actuals.OrderBy(s => s).ToArray());
+        }
+
+        public static void CompareXml(string expectedPath, string actualPath)
+        {
+            var expectedDoc = XDocument.Load(expectedPath, LoadOptions.PreserveWhitespace | LoadOptions.SetBaseUri | LoadOptions.SetLineInfo);
+            var actualDoc = XDocument.Load(actualPath, LoadOptions.PreserveWhitespace | LoadOptions.SetBaseUri | LoadOptions.SetLineInfo);
+
+            CompareXml(expectedDoc, actualDoc);
+        }
+
+        public static void Succeeded(int hr, string format, params object[] formatArgs)
+        {
+            if (0 > hr)
+            {
+                throw new SucceededException(hr, String.Format(format, formatArgs));
+            }
+        }
+    }
+}