public function testPathMustExist()
{
try {
new Php(array('path' => $this->_path));
$result = true;
} catch (Exception $e) {
$result = false;
}
$this->assert($result);
try {
new Php(array('path' => "{$this->_path}/i_do_not_exist"));
$result = false;
} catch (Exception $e) {
$result = true;
}
$this->assert($result);
}