RegexpOperator spec = (new NegatedAsciiCharacterClass.Factory()).createOperator(params);
NondeterministicAutomatonByThompsonApproach automaton =
new NondeterministicAutomatonByThompsonApproach(spec.createAutomaton(
new ArrayList<AutomatonSpecification>()));
assertFalse(automaton.accepts("0"));
assertFalse(automaton.accepts("3"));
assertFalse(automaton.accepts("4"));
assertFalse(automaton.accepts("1"));
assertFalse(automaton.accepts("9"));
assertTrue(automaton.accepts("a"));
assertTrue(automaton.accepts("Z"));