public function testShouldSetOptionsThroughConfig()
{
$gravatar = new Gravatar(['default_image' => 'retro', 'rating' => 'x', 'size' => 60, 'use_https' => true]);
$this->assertEquals('retro', $gravatar->getDefaultImage());
$this->assertEquals(Gravatar::RATING_X, $gravatar->getRating());
$this->assertEquals(60, $gravatar->getSize());
$this->assertTrue($gravatar->isUseSecureURL());
}