public void MarkTest()
{
MemoryStream stream = new MemoryStream();
StreamWriter writer = new StreamWriter(stream);
writer.Write("hi pals");
writer.Flush();
stream.Seek(0, SeekOrigin.Begin);
using (TextReader reader = new StreamReader(stream))
{
ParserReader parser = new ParserReader(reader);
Assert.AreEqual('h', (char)parser.GetCurrent(), "MarkTest#100");
parser.Mark(); //mark a save point
Assert.AreEqual('h', (char)parser.Read(), "MarkTest#200");
Assert.AreEqual('i', (char)parser.Read(), "MarkTest#300");
Assert.AreEqual(' ', (char)parser.Read(), "MarkTest#400");
Assert.AreEqual('p', (char)parser.GetCurrent(), "MarkTest#500");
Assert.AreEqual('p', (char)parser.Read(), "MarkTest#550");
Assert.AreEqual("hi p", parser.GetString(), "MarkTest#575");
parser.Reset(); // reset to the last save point
Assert.AreEqual('h', (char)parser.GetCurrent(), "MarkTest#600");
parser.Mark();
Assert.AreEqual('h', (char)parser.GetCurrent(), "MarkTest#700");
parser.Unmark();
Assert.AreEqual('h', (char)parser.GetCurrent(), "MarkTest#800");
Assert.AreEqual('h', (char)parser.Read(), "MarkTest#900");
Assert.AreEqual('i', (char)parser.Read(), "MarkTest#925");
Assert.AreEqual(' ', (char)parser.GetCurrent(), "MarkTest#950");
Assert.AreEqual('h', (char)parser.GetPrevious(), "MarkTest#1000");
}
}
