public void Test_IsNull()
		{
			IsNullSpecification s = new IsNullSpecification();
			Assert.IsTrue(s.Test(null).Success);
			Assert.IsTrue(s.Test("").Success);	// treat empty string as null
			Assert.IsFalse(s.Test(new object()).Success);
			Assert.IsFalse(s.Test(0).Success);
		}
        public void Test_IsNull()
        {
            IsNullSpecification s = new IsNullSpecification();

            Assert.IsTrue(s.Test(null).Success);
            Assert.IsTrue(s.Test("").Success);                  // treat empty string as null
            Assert.IsFalse(s.Test(new object()).Success);
            Assert.IsFalse(s.Test(0).Success);
        }