public void TestClear()
        {
            var output            = new OutputBuilder().Append(originalMessage);
            var outputBuilderType = output.GetType();
            var bufferPos         = outputBuilderType.GetField("bufferPos", BindingFlags.Instance | BindingFlags.NonPublic);

            Assert.AreEqual(originalMessage.Length, bufferPos.GetValue(output));

            output.Clear();

            Assert.AreEqual(0, bufferPos.GetValue(output));
        }