public function testSetFolderId()
{
$client = $this->getClient();
$mailClient = new MailAPI();
$mailClient->setClient($client->getClient());
$mailClient->setFolderId($client->getFolderId());
$folder = $client->getFolderByFolderId($mailClient->getFolderId()->getId());
$this->assertEquals('Test', $folder->getDisplayName());
}