public function testAddUserPlaylistTracks()
{
$tracks = array('spotify:track:1id6H6vcwSB9GGv9NXh5cl', '3mqRLlD9j92BBv1ueFhJ1l');
$options = array('position' => 0);
$expected = json_encode(array('spotify:track:1id6H6vcwSB9GGv9NXh5cl', 'spotify:track:3mqRLlD9j92BBv1ueFhJ1l'));
$headers = array('Authorization' => 'Bearer ' . $this->accessToken, 'Content-Type' => 'application/json');
$return = array('status' => 201);
$stub = $this->setupStub('POST', '/v1/users/mcgurk/playlists/0UZ0Ll4HJHR7yvURYbHJe9/tracks?position=0', $expected, $headers, $return);
$api = new SpotifyWebAPI\SpotifyWebAPI($stub);
$api->setAccessToken($this->accessToken);
$response = $api->addUserPlaylistTracks('mcgurk', '0UZ0Ll4HJHR7yvURYbHJe9', $tracks, $options);
$this->assertTrue($response);
}