private RegexNode parse(String regex) throws RegexParsingException {
RegexTreeTransformer parser = RegexTreeTransformer.parse(regex);
RegexNode tree = parser.getRegexTree();
debug(regex, parser, tree);
return tree;
}
@Test(expected = RegexParsingException.class)
public void invalidInput() throws RegexParsingException {
RegexTreeTransformer.parse(")I'm(invalid+input*");
}