From e9019d5f224f266e88d9882502f83f0c6865ec24 Mon Sep 17 00:00:00 2001
From: Antoine Aubry <aaubry@dell.(none)>
Date: Sat, 25 May 2013 22:08:10 +0100
Subject: [PATCH] Fix bug when serializing lists with nulls inside.

---
 .../DefaultExclusiveObjectGraphVisitor.cs     |  3 +-
 .../RepresentationModel/SerializationTests.cs | 31 +++++++++++++++++++
 2 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/YamlDotNet.RepresentationModel/Serialization/DefaultExclusiveObjectGraphVisitor.cs b/YamlDotNet.RepresentationModel/Serialization/DefaultExclusiveObjectGraphVisitor.cs
index 68fda902c..f640578c2 100644
--- a/YamlDotNet.RepresentationModel/Serialization/DefaultExclusiveObjectGraphVisitor.cs
+++ b/YamlDotNet.RepresentationModel/Serialization/DefaultExclusiveObjectGraphVisitor.cs
@@ -21,8 +21,7 @@ private static object GetDefault(Type type)
 
 		public override bool Enter(object value, Type type)
 		{
-			return !_objectComparer.Equals(value, GetDefault(type))
-			       && base.Enter(value, type);
+			return base.Enter(value, type);
 		}
 
 		public override bool EnterMapping(object key, Type keyType, object value, Type valueType)
diff --git a/YamlDotNet.UnitTests/RepresentationModel/SerializationTests.cs b/YamlDotNet.UnitTests/RepresentationModel/SerializationTests.cs
index 29a81d7ba..72967f056 100644
--- a/YamlDotNet.UnitTests/RepresentationModel/SerializationTests.cs
+++ b/YamlDotNet.UnitTests/RepresentationModel/SerializationTests.cs
@@ -22,6 +22,7 @@
 using System;
 using System.Drawing;
 using System.Linq;
+using System.Text.RegularExpressions;
 using Xunit;
 using System.IO;
 using YamlDotNet.Core;
@@ -961,5 +962,35 @@ public void DefaultValueAttributeIsIgnoredWhenValueIsDifferent()
 
 			Assert.True(serialized.Contains("Value"));
 		}
+
+		[Fact]
+		public void NullValuesInListsAreAlwaysEmittedWithoutEmitDefaults()
+		{
+			var input = new string[] { "foo", null, "bar" };
+
+			var serializer = new Serializer();
+			var writer = new StringWriter();
+			serializer.Serialize(writer, input);
+			var serialized = writer.ToString();
+
+			Console.WriteLine(serialized);
+			
+			Assert.Equal(3, Regex.Matches(serialized, "-").Count);
+		}
+
+		[Fact]
+		public void NullValuesInListsAreAlwaysEmittedWithEmitDefaults()
+		{
+			var input = new string[] { "foo", null, "bar" };
+
+			var serializer = new Serializer();
+			var writer = new StringWriter();
+			serializer.Serialize(writer, input, SerializationOptions.EmitDefaults);
+			var serialized = writer.ToString();
+
+			Console.WriteLine(serialized);
+			
+			Assert.Equal(3, Regex.Matches(serialized, "-").Count);
+		}
 	}
 }