Upgrade DiffLib.

The old version had a bug that caused tests to fail when the last method in a test file was surrounded by #if/#endif.

ICSharpCode.Decompiler.Tests/Helpers/CodeAssert.cs

@@ -29,44 +29,46 @@ namespace ICSharpCode.Decompiler.Tests.Helpers
 	{
 		public static bool Compare(string input1, string input2, StringWriter diff, Func<string, string> normalizeLine, string[] definedSymbols = null)
 		{
-			var differ = new AlignedDiff<string>(
-				NormalizeAndSplitCode(input1, definedSymbols ?? new string[0]),
-				NormalizeAndSplitCode(input2, definedSymbols ?? new string[0]),
-				new CodeLineEqualityComparer(normalizeLine),
-				new StringSimilarityComparer(),
-				new StringAlignmentFilter());
-
+			var collection1 = NormalizeAndSplitCode(input1, definedSymbols ?? new string[0]);
+			var collection2 = NormalizeAndSplitCode(input2, definedSymbols ?? new string[0]);
+			var diffSections = DiffLib.Diff.CalculateSections(
+				collection1, collection2, new CodeLineEqualityComparer(normalizeLine)
+			);
+			var alignedDiff = Diff.AlignElements(collection1, collection2, diffSections, new StringSimilarityDiffElementAligner());
+			
 			bool result = true, ignoreChange;
 
 			int line1 = 0, line2 = 0;
 
-			foreach (var change in differ.Generate()) {
-				switch (change.Change) {
-					case ChangeType.Same:
+			foreach (var change in alignedDiff) {
+				
+				switch (change.Operation) {
+					case DiffOperation.Match:
 						diff.Write("{0,4} {1,4} ", ++line1, ++line2);
 						diff.Write("  ");
-						diff.WriteLine(change.Element1);
+						diff.WriteLine(change.ElementFromCollection1.Value);
 						break;
-					case ChangeType.Added:
+					case DiffOperation.Insert:
 						diff.Write("     {1,4} ", line1, ++line2);
-						result &= ignoreChange = ShouldIgnoreChange(change.Element2);
+						result &= ignoreChange = ShouldIgnoreChange(change.ElementFromCollection2.Value);
 						diff.Write(ignoreChange ? "    " : " +  ");
-						diff.WriteLine(change.Element2);
+						diff.WriteLine(change.ElementFromCollection2.Value);
 						break;
-					case ChangeType.Deleted:
+					case DiffOperation.Delete:
 						diff.Write("{0,4}      ", ++line1, line2);
-						result &= ignoreChange = ShouldIgnoreChange(change.Element1);
+						result &= ignoreChange = ShouldIgnoreChange(change.ElementFromCollection1.Value);
 						diff.Write(ignoreChange ? "    " : " -  ");
-						diff.WriteLine(change.Element1);
+						diff.WriteLine(change.ElementFromCollection1.Value);
 						break;
-					case ChangeType.Changed:
+					case DiffOperation.Modify:
+					case DiffOperation.Replace:
 						diff.Write("{0,4}      ", ++line1, line2);
 						result = false;
 						diff.Write("(-) ");
-						diff.WriteLine(change.Element1);
+						diff.WriteLine(change.ElementFromCollection1.Value);
 						diff.Write("     {1,4} ", line1, ++line2);
 						diff.Write("(+) ");
-						diff.WriteLine(change.Element2);
+						diff.WriteLine(change.ElementFromCollection2.Value);
 						break;
 				}
 			}
@@ -128,7 +130,7 @@ namespace ICSharpCode.Decompiler.Tests.Helpers
 			}
 		}
 
-		private static IEnumerable<string> NormalizeAndSplitCode(string input, IEnumerable<string> definedSymbols)
+		private static IList<string> NormalizeAndSplitCode(string input, IEnumerable<string> definedSymbols)
 		{
 			var syntaxTree = CSharpSyntaxTree.ParseText(input, new CSharpParseOptions(preprocessorSymbols: definedSymbols));
 			var result = new DeleteDisabledTextRewriter().Visit(syntaxTree.GetRoot());

ICSharpCode.Decompiler.Tests/ICSharpCode.Decompiler.Tests.csproj

@@ -36,7 +36,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="DiffLib" Version="1.0.0.55" />
+    <PackageReference Include="DiffLib" Version="2017.7.26.1241" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="2.8.0" />
     <PackageReference Include="Microsoft.CodeAnalysis.VisualBasic" Version="2.8.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.9.0" />