public void AdvanceCharBy5_OnNewSlidingTextWindow_ChangesOffsetTo5()
{
var sourceText = SourceText.From("abcdefghijklmnopqrstuvwyx0123456789");
var slidingTextWindow = new SlidingTextWindow(sourceText);
slidingTextWindow.AdvanceChar(5);
Assert.AreEqual(5, slidingTextWindow.Offset);
}
public void PeekChar_WithOffsetMoreThanDefaultWindowLength_ReturnsCharacter()
{
var text = "abcdefghijklmnopqrstuvwyx0123456789";
var sourceText = SourceText.From(text);
var slidingTextWindow = new SlidingTextWindow(sourceText);
slidingTextWindow.AdvanceChar(30);
var peekedChar = slidingTextWindow.PeekChar();
Assert.AreEqual(text[30], peekedChar);
}
private string LexSyntaxTrivia()
{
TextWindow.Start();
var ch = TextWindow.PeekChar();
while (char.IsWhiteSpace(ch))
{
TextWindow.AdvanceChar();
ch = TextWindow.PeekChar();
}
return(TextWindow.GetText());
}