@Test
public void downloadYouTubeVideo_NoErrors_ReturnsVideoId() {

    final String ExpectedVideoId = "video_id_1";
    final String YouTubeUrl = "youtube.com123";
    MockInterceptor okHttpMockInterceptor = new MockInterceptor();
    okHttpMockInterceptor.addRule()
            .get()
            .urlStarts("https://jumpcutter.letum.ch/youtube?url=" + YouTubeUrl)
            .respond(ExpectedVideoId);
    OkHttpClient okHttpClient = new OkHttpClient.Builder()
            .addInterceptor(okHttpMockInterceptor)
            .build();
    ServerWrapper server = new ServerWrapper(okHttpClient, null);
    String videoId = server.downloadYouTubeVideo(YouTubeUrl);
    Assert.assertEquals(ExpectedVideoId, videoId);
}