public void HandleCombiningCharacters()
{
var str = "cre\u0300me bru\u0302le\u0301e 000";
var reader = new BufferedStringReader(_createStream(str), null);
Assert.AreEqual("cre\u0300me ", reader.Read(6));
Predicate <string> func = (ch) => char.IsLetter(ch, 0);
Assert.AreEqual("bru\u0302le\u0301e", reader.ReadWhile(func));
Assert.AreEqual(" 000", reader.Read(10));
}
public void ReadWhile()
{
Predicate <string> func = (ch) => char.IsLetter(ch, 0);
var str = "Foo_Bar";
var reader = new BufferedStringReader(_createStream(str), null);
Assert.AreEqual("Foo", reader.ReadWhile(func));
Assert.AreEqual("", reader.ReadWhile(func));
Assert.AreEqual("", reader.ReadWhile(func));
Assert.AreEqual("_", reader.Read(1));
Assert.AreEqual("Bar", reader.ReadWhile(func));
Assert.AreEqual("", reader.ReadWhile(func));
}
public void HandlesSurrogates()
{
var str = "😀😈_😓ðŸ˜";
Assert.AreEqual(9, str.Length); // Each should be a surrogate pair
var reader = new BufferedStringReader(_createStream(str), null);
Assert.AreEqual("😀", reader.Peek(1));
Assert.AreEqual("😀😈", reader.Peek(2));
Assert.AreEqual("😀", reader.Read(1));
Assert.AreEqual("😈_😓ðŸ˜", reader.Peek(10));
Assert.AreEqual("😈_", reader.ReadUntil("_"));
Assert.AreEqual("😓ðŸ˜", reader.ReadUntil("😱"));
str = "😀😀😀😀😀😀_123";
Predicate <string> func = (ch) => ch == "😀";
reader = new BufferedStringReader(_createStream(str), null);
Assert.AreEqual("😀😀😀😀😀😀", reader.ReadWhile(func));
Assert.AreEqual("_123", reader.Read(10));
}
public void TracksPosition()
{
var str = "Foo\nBar\nBaz\n\n123\n000";
var reader = new BufferedStringReader(_createStream(str), null);
Assert.AreEqual("Fo", reader.Read(2));
Assert.AreEqual(3, reader.Column);
Assert.AreEqual(1, reader.Line);
Assert.AreEqual("o\nB", reader.Read(3));
Assert.AreEqual(2, reader.Column);
Assert.AreEqual(2, reader.Line);
Assert.AreEqual("ar", reader.Read(2));
Assert.AreEqual(4, reader.Column);
Assert.AreEqual(2, reader.Line);
Assert.AreEqual("\n", reader.Read(1));
Assert.AreEqual(1, reader.Column);
Assert.AreEqual(3, reader.Line);
Assert.AreEqual("Baz\n\n123\n0", reader.Read(10));
Assert.AreEqual(2, reader.Column);
Assert.AreEqual(6, reader.Line);
Assert.AreEqual("00", reader.Read(10));
Assert.AreEqual("", reader.Read(10));
}