1 files changed, 10 insertions, 0 deletions

diff --git a/src/WixBuildTools.TestSupport/WixAssert.cs b/src/WixBuildTools.TestSupport/WixAssert.cs
index 4a5c6a97..71dc6b67 100644
--- a/src/WixBuildTools.TestSupport/WixAssert.cs
+++ b/src/WixBuildTools.TestSupport/WixAssert.cs
@@ -7,6 +7,16 @@ namespace WixBuildTools.TestSupport
 
     public class WixAssert : Assert
     {
+        public static void AssertEqualLineByLine(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 Succeeded(int hr, string format, params object[] formatArgs)
         {
             if (0 > hr)