Imported Upstream version 3.12.0

Former-commit-id: cf92446697332992ec36726e78eb8703e1f259d7

mcs/class/System.Xml.Linq/Test/System.Xml.Linq/XCommentTest.cs

@@ -0,0 +1,66 @@
+//
+// Authors:
+//   Atsushi Enomoto
+//
+// Copyright 2014 Xamarin Inc. (http://www.xamarin.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+using System;
+using System.IO;
+using System.Xml;
+using System.Xml.Linq;
+using System.Linq;
+
+using NUnit.Framework;
+
+namespace MonoTests.System.Xml.Linq
+{
+	[TestFixture]
+	public class XCommentTest
+	{
+		[Test]
+		public void EscapeSequentialDashes ()
+		{
+			XComment c;
+
+			c = new XComment ("<--foo-->");
+			Assert.AreEqual ("<--foo-->", c.Value, "#1");
+			// bug #23318
+			// Unlike XmlWriter.WriteComment(), XComment.ToString() seems to accept "--" in the value.
+			Assert.AreEqual ("<!--<- -foo- ->-->", c.ToString (), "#2");
+			// make sure if it can be read...
+			XmlReader.Create (new StringReader (c.ToString ())).Read ();
+
+			// The last '-' causes some glitch...
+			c = new XComment ("--foo--");
+			Assert.AreEqual ("--foo--", c.Value, "#3");
+			Assert.AreEqual ("<!--- -foo- &#2D;-->", c.ToString (), "#4");
+			XmlReader.Create (new StringReader (c.ToString ())).Read ();
+
+			// What if <!-- appears in the value?
+			c = new XComment ("<!--foo-->");
+			Assert.AreEqual ("<!--foo-->", c.Value, "#5");
+			Assert.AreEqual ("<!--<!- -foo- ->-->", c.ToString (), "#6");
+			XmlReader.Create (new StringReader (c.ToString ())).Read ();
+		}
+	}
+}