SpotifyOAuthTokenRefresher extends OAuthTokenRefresher { @Override public String getClientSecret() { return SpotifyHelper.CLIENT_SECRET; } SpotifyOAuthTokenRefresher(); @Override String getTokenUrl(); @Override String getClientId(); @Override String getClientSecret();  }
@Test public void test_getClientSecret() { assertEquals(SpotifyHelper.CLIENT_SECRET, refresher.getClientSecret()); }