public void TestEqual()
{
var left = new Null();
var right = new Null();
Assert.AreEqual(left, right);
Assert.IsTrue(left == right);
Assert.IsTrue(left.Equals(right));
Assert.IsTrue(left != null);
// ReSharper disable EqualExpressionComparison
Assert.IsTrue(left == left);
// ReSharper restore EqualExpressionComparison
Assert.Throws <ArgumentNullException>(() => left.AppendBytesTo(null));
Assert.AreEqual("Null", left.ToString());
}