WhitespaceOperator operator = new WhitespaceOperator();
AutomatonSpecification spec = operator.createFixedAutomaton();
assertFalse(spec.isEmpty());
assertFalse(spec.acceptEmptyWord());
AutomatonByRecursion automaton = new AutomatonByRecursion(spec);
assertTrue(automaton.accepts("\t"));
assertTrue(automaton.accepts("\n"));
assertTrue(automaton.accepts("\f"));
assertTrue(automaton.accepts("\r"));
assertTrue(automaton.accepts(" "));
assertTrue(automaton.accepts("\u000B"));