public function testAddAttachment()
{
$fh = fopen(__DIR__ . '/_files/logo.jpg', 'r');
$user = $this->dm->find('Doctrine\\Tests\\Models\\CMS\\CmsUser', 'user_with_attachment');
$user->attachments['logo.jpg'] = Attachment::createFromBinaryData($fh, 'image/jpeg');
$this->dm->flush();
$this->dm->clear();
// dont re-use identity map
$user = $this->dm->find('Doctrine\\Tests\\Models\\CMS\\CmsUser', 'user_with_attachment');
$this->assertEquals(2, count($user->attachments));
$this->assertArrayHasKey('logo.jpg', $user->attachments);
$this->assertInstanceOf('Doctrine\\CouchDB\\Attachment', $user->attachments['foo.txt']);
}