public void CharStream_BasicTest() {
string text = "abcd\"foo\"\r\n<a href=";
HtmlCharStream cs = new HtmlCharStream(text);
Assert.Equal('a', cs.CurrentChar);
cs.Advance(2);
Assert.False(cs.IsEndOfStream());
Assert.Equal('c', cs.CurrentChar);
cs.Advance(-1);
Assert.False(cs.IsEndOfStream());
Assert.Equal('b', cs.CurrentChar);
cs.Advance(text.Length);
Assert.True(cs.IsEndOfStream());
Assert.Equal(0, cs.CurrentChar);
cs.Advance(-text.Length);
Assert.False(cs.IsEndOfStream());
Assert.Equal('a', cs.CurrentChar);
Assert.Equal('d', cs.LookAhead(3));
Assert.Equal('\"', cs.LookAhead(4));
Assert.Equal(0, cs.LookAhead(text.Length));
Assert.Equal(0, cs.LookAhead(-1));
Assert.Equal(text.Length, cs.DistanceFromEnd);
cs.Advance(1);
Assert.Equal(text.Length - 1, cs.DistanceFromEnd);
cs.Position = 4;
Assert.True(cs.IsAtString());
cs.Position = 5;
Assert.False(cs.IsAtString());
cs.Position = 9;
Assert.True(cs.IsWhiteSpace());
cs.MoveToNextChar();
Assert.True(cs.IsWhiteSpace());
cs.MoveToNextChar();
Assert.True(cs.IsAtTagDelimiter());
}
public void HtmlCharStream_IsNameCharTest() {
var stream = new HtmlCharStream(new TextStream(""));
Assert.True(stream.IsEndOfStream());
Assert.Equal(0, stream.Length);
stream = new HtmlCharStream(new TextStream("<h123"));
Assert.Equal(0, stream.Position);
Assert.False(stream.IsEndOfStream());
stream.Position = 5;
Assert.True(stream.IsEndOfStream());
stream.Position = 0;
Assert.False(stream.IsEndOfStream());
stream.MoveToNextChar();
Assert.Equal(1, stream.Position);
stream.Advance(2);
Assert.Equal(3, stream.Position);
stream.Advance(-2);
Assert.Equal(1, stream.Position);
stream.Advance(1000);
Assert.True(stream.IsEndOfStream());
stream.Position = 0;
Assert.True(stream.IsAtTagDelimiter());
Assert.Equal('<', stream.CurrentChar);
Assert.Equal('h', stream.NextChar);
stream.Position = 1;
Assert.False(stream.IsAtTagDelimiter());
Assert.True(stream.IsNameChar());
Assert.True(HtmlCharStream.IsNameStartChar(stream.CurrentChar));
stream.Position = 2;
Assert.False(stream.IsAtTagDelimiter());
Assert.True(stream.IsNameChar());
Assert.False(HtmlCharStream.IsNameStartChar(stream.CurrentChar));
}
public void HtmlTokenizer_SkipWhitespaceTest() {
var cs = new HtmlCharStream(" abc\t\tdef\r\n gh");
HtmlTokenizer target = new HtmlTokenizer(cs);
target.SkipWhitespace();
Assert.Equal(3, cs.Position);
target.SkipWhitespace();
Assert.Equal(3, cs.Position);
cs.Advance(3);
target.SkipWhitespace();
Assert.Equal(8, cs.Position);
cs.Advance(3);
target.SkipWhitespace();
Assert.Equal(14, cs.Position);
}
