### Question:
SpotifyAPICalls { public int getVolume() { if (getSpotifyApi() != null && getActiveDevice() != null && getActiveDevice().getVolume_percent() != null) { return getActiveDevice().getVolume_percent().intValue(); } return -1; }  SpotifyApi getSpotifyApi(); URI authorizationCodeUri(); boolean createRefreshToken(String authCode); void setClientID(String clientID); void setClientSecret(String clientSecret); boolean setCurrentDevice(String deviceID); boolean checkPlayerState(); Device[] getDevices(); Device getActiveDevice(); boolean checkDeviceIsLoggedIn(String deviceId); boolean playSongFromUri(String uri); boolean playListFromUri(String uri); boolean resume(); boolean pause(); boolean skip(); boolean back(); boolean setVolume(int volume); int getVolume(); CurrentlyPlayingContext getCurrentPlayingContext(); boolean getIsPlaying(); SearchResult searchInSpotify(String searchItem, String type, int limit); FeaturedPlaylists getFeaturedPlaylists(int limit); Paging<PlaylistSimplified> getOwnPlaylists(int limit); static final String SPOTIFY_CLIENTSECRET_KEY; static final String SPOTIFY_CLIENTID_KEY; static final String SPOTIFY_REFRSHTOKEN_KEY; static final int TOKEN_EXPIRE_TIME_OFFSET; static final String SPOTIFY_ERROR_TAG; }### Answer:
@Test public void testGetVolumeNoDevice() { assertThat(this.spotifyAPICalls.getVolume(), equalTo(-1)); }