public void testParseOperators() throws Exception {
ExprRootNode<?> expr = (new ExpressionParser("-11")).parseExpression();
NegativeOpNode negOp = (NegativeOpNode) expr.getChild(0);
assertEquals(11, ((IntegerNode) negOp.getChild(0)).getValue());
expr = (new ExpressionParser("not false")).parseExpression();
NotOpNode notOp = (NotOpNode) expr.getChild(0);
assertEquals(false, ((BooleanNode) notOp.getChild(0)).getValue());