public function testCreateUser()
 {
     $user = new User(['nickname' => 'Alex']);
     $user->setScenario('insert');
     $this->assertTrue($user->save());
     $path = $user->getUploadPath('image');
     $this->assertTrue(is_file($path));
     $this->assertEquals(sha1_file($path), sha1_file(__DIR__ . '/data/test-image.jpg'));
 }