public function testValidate()
{
$validator = new ReferenceValidator();
$parameters = [$this->dataBook, 'library'];
$read = $validator->isValid(1, $parameters);
$this->assertTrue($read);
$read = $validator->isValid(2, $parameters);
$this->assertFalse($read);
$read = $validator->isValid(null, $parameters);
$this->assertTrue($read);
$read = $validator->isValid('', $parameters);
$this->assertTrue($read);
}