public function testToString()
{
$expr1 = new Not(new StartsWith('Thomas'));
$expr2 = new Not(new OrX(array(new GreaterThan(10), new LessThan(0))));
$this->assertSame('not(startsWith("Thomas"))', $expr1->toString());
$this->assertSame('not(>10 || <0)', $expr2->toString());
}
private function traverseNot(Not $expr)
{
$negatedExpr1 = $expr->getNegatedExpression();
$negatedExpr2 = $this->traverse($negatedExpr1);
if ($negatedExpr1 === $negatedExpr2) {
return $expr;
}
return $negatedExpr2 ? new Not($negatedExpr2) : null;
}
