public function testDataInvalidImageFileType()
 {
     // "uri": "/listings/:listing_id/images"
     $method = 'uploadListingImage';
     $args = array('params' => array('listing_id' => 123456), 'data' => array('image' => array('file.jpg;type=image/jpeg')));
     $result = RequestValidator::validateParams($args, $this->methods[$method]);
     $this->assertArrayHasKey('_invalid', $result, print_r(@$result['_invalid'], true));
     $this->assertCount(1, $result['_invalid']);
     $this->assertRegExp($this->invalidTypeRegExp, $result['_invalid'][0]);
 }