### Question:
SpotifyAPICalls { public boolean checkPlayerState() { if (getSpotifyApi() == null) { this.logger.warn("Please initialize the spotify api with the client id and client secret"); return false; } if (!checkDeviceIsLoggedIn(this.userData.getCurrentDeviceId())) { this.logger.warn("Device has been disconnected or is not the active device"); return false; } return true; }  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 testCheckPlayerState() { doReturn(this.spotifyApi).when(this.spotifyAPICalls).getSpotifyApi(); this.spotifyAPICalls.setCurrentDevice("w"); assertThat(this.spotifyAPICalls.checkPlayerState(), equalTo(false)); doReturn(null).when(this.spotifyAPICalls).getSpotifyApi(); assertThat(this.spotifyAPICalls.checkPlayerState(), equalTo(false)); }