public function testPopularTags()
{
$this->setRequest(Request::create('/async/populartags'));
$response = $this->controller()->popularTags($this->getRequest(), 'tags');
$this->assertTrue($response instanceof JsonResponse);
$this->assertSame(Response::HTTP_OK, $response->getStatusCode());
$json = json_decode($response->getContent());
$tags = $this->getDefaultTags();
$this->assertCount(20, $json);
$this->assertTrue(in_array($json[0]->name, $tags));
}