public void TextNavigator_LookBehind_2()
{
const string text = "ABC";
TextNavigator navigator = new TextNavigator(text);
Assert.AreEqual(TextNavigator.EOF, navigator.LookBehind(2));
navigator.ReadChar();
Assert.AreEqual(TextNavigator.EOF, navigator.LookBehind(2));
navigator.ReadChar();
Assert.AreEqual('A', navigator.LookBehind(2));
navigator.ReadChar();
Assert.AreEqual('B', navigator.LookBehind(2));
navigator.ReadChar();
Assert.AreEqual('B', navigator.LookBehind(2));
navigator.ReadChar();
}
