1 files changed, 59 insertions, 0 deletions
diff --git a/test/Mono.Linker.Tests/TestCasesRunner/FormattingUtils.cs b/test/Mono.Linker.Tests/TestCasesRunner/FormattingUtils.cs
new file mode 100644
index 000000000..97c14abb2
--- /dev/null
+++ b/test/Mono.Linker.Tests/TestCasesRunner/FormattingUtils.cs
@@ -0,0 +1,59 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Mono.Linker.Tests.TestCasesRunner {
+	public static class FormattingUtils {
+		public static string FormatSequenceCompareFailureMessage (IEnumerable<string> actual, IEnumerable<string> expected)
+		{
+			var builder = new StringBuilder ();
+			builder.AppendLine ("---------------");
+			builder.AppendLine ($"Expected/Original (Total : {expected.Count ()})");
+			builder.AppendLine ("---------------");
+			// Format in a quoted array form for easier copying into a expected sequence attribute
+			builder.AppendLine (expected.Select (c => $"\"{c}\",").AggregateWithNewLine ());
+			builder.AppendLine ("---------------");
+			builder.AppendLine ($"Actual/Linked (Total : {actual.Count ()})");
+			builder.AppendLine ("---------------");
+			// Format in a quoted array form for easier copying into a expected sequence attribute
+			builder.AppendLine (actual.Select(c => $"\"{c}\",").AggregateWithNewLine ());
+			builder.AppendLine ("---------------");
+			return builder.ToString ();
+		}
+
+		public static string FormatSequenceCompareFailureMessage2 (IEnumerable<string> actual, IEnumerable<string> expected, IEnumerable<string> original)
+		{
+			var builder = new StringBuilder ();
+			builder.AppendLine ("---------------");
+			builder.AppendLine ($"Expected (Total : {expected.Count ()})");
+			builder.AppendLine ("---------------");
+			// Format in a quoted array form for easier copying into a expected sequence attribute
+			builder.AppendLine (expected.Select(c => $"\"{c}\",").AggregateWithNewLine ());
+			builder.AppendLine ("---------------");
+			builder.AppendLine ($"Actual/Linked (Total : {actual.Count ()})");
+			builder.AppendLine ("---------------");
+			// Format in a quoted array form for easier copying into a expected sequence attribute
+			builder.AppendLine (actual.Select(c => $"\"{c}\",").AggregateWithNewLine ());
+			builder.AppendLine ("---------------");
+			builder.AppendLine ($"Original (Total : {original.Count()})");
+			builder.AppendLine ("---------------");
+			// Format in a quoted array form for easier copying into a expected sequence attribute
+			builder.AppendLine (original.Select(c => $"\"{c}\",").AggregateWithNewLine ());
+			builder.AppendLine ("---------------");
+			return builder.ToString ();
+		}
+		
+		private static string AggregateWithNewLine (this IEnumerable<string> elements)
+		{
+			return elements.AggregateWith (System.Environment.NewLine);
+		}
+
+		private static string AggregateWith (this IEnumerable<string> elements, string separator)
+		{
+			if (elements.Any ())
+				return elements.Aggregate ((buff, s) => buff + separator + s);
+
+			return string.Empty;
+		}
+	}
+}
+\ No newline at end of file