public void ReadSuccess(string input) { var valueRangeLexerFactory = new ValueRangeLexerFactory(); var digitLexerFactory = new DigitLexerFactory(valueRangeLexerFactory); var terminalLexerFactory = new TerminalLexerFactory(); var alternativeLexerFactory = new AlternativeLexerFactory(); var factory = new HexadecimalDigitLexerFactory(digitLexerFactory, terminalLexerFactory, alternativeLexerFactory); var lexer = factory.Create(); using (var scanner = new TextScanner(new StringTextSource(input))) { var result = lexer.Read(scanner); Assert.NotNull(result); Assert.True(result.Success); Assert.NotNull(result.Element); Assert.Equal(input, result.Element.Text); } }