public function testStoreSameImageTwice()
{
$user = 'user';
$imageIdentifier = 'id';
$image = $this->getImage();
$this->assertTrue($this->adapter->insertImage($user, $imageIdentifier, $image));
$lastModified1 = $this->adapter->getLastModified([$user], $imageIdentifier);
sleep(1);
$this->assertTrue($this->adapter->insertImage($user, $imageIdentifier, $image));
$lastModified2 = $this->adapter->getLastModified([$user], $imageIdentifier);
$this->assertTrue($lastModified2 > $lastModified1);
}