public function testAdapterHasValidators()
{
$size = new Size(['min' => '10kB', 'max' => '5MB', 'useByteString' => true]);
$extension = new Extension(['jpg', 'gif', 'png', 'jpeg', 'bmp', 'webp', 'svg'], true);
$this->adapter->setValidators([$size, new IsImage(), $extension]);
$testExtension = $this->adapter->getValidator('Extension');
$testIsImage = $this->adapter->getValidator('IsImage');
$testSize = $this->adapter->getValidator('Size');
$this->assertInstanceOf('Zend\\Validator\\File\\Extension', $testExtension);
$this->assertInstanceOf('Zend\\Validator\\File\\IsImage', $testIsImage);
$this->assertInstanceOf('Zend\\Validator\\File\\Size', $testSize);
}