--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/UnitTests/CS/Mapping/NullableAttributeTest.cs	Thu Mar 27 21:46:09 2014 +0400
@@ -0,0 +1,198 @@
+using System;
+
+using NUnit.Framework;
+
+using BLToolkit.Mapping;
+
+namespace Mapping
+{
+	[TestFixture]
+	public class NullableAttributeTest
+	{
+		public abstract class Object1
+		{
+			[NotNull]                   public abstract string Str1 { get; set; }
+			[Nullable]                  public abstract string Str2 { get; set; }
+			[NullValue("(null)")]       public abstract string Str3 { get; set; }
+			[NullValue(typeof(DBNull))] public abstract string Str4 { get; set; }
+		}
+
+		[Test]
+		public void TestString1()
+		{
+			var om = Map.GetObjectMapper(typeof(Object1));
+			var o  = (Object1)om.CreateInstance();
+
+			om.SetValue(o, "Str1", null);
+			om.SetValue(o, "Str2", null);
+			om.SetValue(o, "Str3", null);
+			om.SetValue(o, "Str4", null);
+
+			Assert.AreEqual("",       o.Str1);
+			Assert.AreEqual("",       o.Str2);
+			Assert.AreEqual("(null)", o.Str3);
+			Assert.IsNull  (o.Str4);
+
+			Assert.IsNotNull(om.GetValue(o, "Str1"));
+			Assert.IsNull   (om.GetValue(o, "Str2"));
+			Assert.IsNull   (om.GetValue(o, "Str3"));
+			Assert.IsNull   (om.GetValue(o, "Str4"));
+		}
+
+		[NullValue(typeof(string), "(null)")]
+		[NullValue(typeof(bool),   false)]
+		public abstract class Object2
+		{
+			[Nullable(false)]
+			public abstract string Str1 { get; set; }
+			[NullValue("")]
+			public abstract string Str2 { get; set; }
+			public abstract string Str3 { get; set; }
+			[NullValue(typeof(DBNull))]
+			public abstract string Str4 { get; set; }
+		}
+
+		[Test]
+		public void TestString2()
+		{
+			ObjectMapper om = Map.GetObjectMapper(typeof(Object2));
+
+			Object2 o = (Object2)om.CreateInstance();
+
+			om.SetValue(o, "Str1", null);
+			om.SetValue(o, "Str2", null);
+			om.SetValue(o, "Str3", null);
+			om.SetValue(o, "Str4", null);
+
+			Assert.AreEqual("",       o.Str1);
+			Assert.AreEqual("",       o.Str2);
+			Assert.AreEqual("(null)", o.Str3);
+			Assert.IsNull  (o.Str4);
+
+			Assert.IsNotNull(om.GetValue(o, "Str1"));
+			Assert.IsNull   (om.GetValue(o, "Str2"));
+			Assert.IsNull   (om.GetValue(o, "Str3"));
+			Assert.IsNull   (om.GetValue(o, "Str4"));
+		}
+
+		[Nullable(typeof(string))]
+		public abstract class Object3
+		{
+			[Nullable(false)]
+			public abstract string Str1 { get; set; }
+			public abstract string Str2 { get; set; }
+			[NullValue("(null)")]
+			public abstract string Str3 { get; set; }
+			[NullValue(typeof(DBNull))]
+			public abstract string Str4 { get; set; }
+		}
+
+		[Test]
+		public void TestString3()
+		{
+			ObjectMapper om = Map.GetObjectMapper(typeof(Object3));
+
+			Object3 o = (Object3)om.CreateInstance();
+
+			om.SetValue(o, "Str1", null);
+			om.SetValue(o, "Str2", null);
+			om.SetValue(o, "Str3", null);
+			om.SetValue(o, "Str4", null);
+
+			Assert.AreEqual("",       o.Str1);
+			Assert.AreEqual("",       o.Str2);
+			Assert.AreEqual("(null)", o.Str3);
+			Assert.IsNull  (o.Str4);
+
+			Assert.IsNotNull(om.GetValue(o, "Str1"));
+			Assert.IsNull   (om.GetValue(o, "Str2"));
+			Assert.IsNull   (om.GetValue(o, "Str3"));
+			Assert.IsNull   (om.GetValue(o, "Str4"));
+		}
+
+		[NullValue("(null)")]
+		public abstract class Object4
+		{
+			[Nullable(false)]
+			public abstract string Str1 { get; set; }
+			[NullValue("")]
+			public abstract string Str2 { get; set; }
+			public abstract string Str3 { get; set; }
+			[NullValue(typeof(DBNull))]
+			public abstract string Str4 { get; set; }
+		}
+
+		[Test]
+		public void TestString4()
+		{
+			ObjectMapper om = Map.GetObjectMapper(typeof(Object2));
+
+			Object2 o = (Object2)om.CreateInstance();
+
+			om.SetValue(o, "Str1", null);
+			om.SetValue(o, "Str2", "2");
+			om.SetValue(o, "Str3", null);
+			om.SetValue(o, "Str4", null);
+
+			Assert.AreEqual("",       o.Str1);
+			Assert.AreEqual("2",      o.Str2);
+			Assert.AreEqual("(null)", o.Str3);
+			Assert.IsNull  (o.Str4);
+
+			Assert.IsNotNull(     om.GetValue(o, "Str1"));
+			Assert.AreEqual ("2", om.GetValue(o, "Str2"));
+			Assert.IsNull   (     om.GetValue(o, "Str3"));
+			Assert.IsNull   (     om.GetValue(o, "Str4"));
+		}
+
+		public class Object5
+		{
+			public int Int1;
+			[Nullable]
+			public int Int2;
+			[NullValue(int.MinValue)]
+			public int Int3;
+		}
+
+		[Test]
+		public void TestPrimitive()
+		{
+			ObjectMapper om = Map.GetObjectMapper(typeof(Object5));
+
+			Object5 o = (Object5)om.CreateInstance();
+
+			om.SetValue(o, "Int1", null);
+			om.SetValue(o, "Int2", null);
+			om.SetValue(o, "Int3", null);
+
+			Assert.AreEqual(0,            o.Int1);
+			Assert.AreEqual(0,            o.Int2);
+			Assert.AreEqual(int.MinValue, o.Int3);
+
+			Assert.IsNotNull(om.GetValue(o, "Int1"));
+			Assert.IsNull   (om.GetValue(o, "Int2"));
+			Assert.IsNull   (om.GetValue(o, "Int3"));
+		}
+
+		[NullValue("(null)")]
+		public class Object6
+		{
+			public string String1;
+		}
+
+		[NullValue("(derived null)")]
+		public class Object6Derived : Object6
+		{
+		}
+
+		[Test]
+		public void TestDerivedNull()
+		{
+			ObjectMapper   om = Map.GetObjectMapper(typeof(Object6Derived));
+			Object6Derived o = (Object6Derived) om.CreateInstance();
+
+			om.SetValue(o, "String1", null);
+			Console.WriteLine(o.String1);
+		}
+	}
+}