public class GateioApiTest {

    GateioApi api;

    @Before
    public void init() {
        api = GateioHttpClient.api();
    }

    @Test
    public void testMarketInfo() {
        api.marketInfo().subscribe(new SingleObserver<JsonObject>() {
            @Override
            public void onSubscribe(Disposable d) {

            }

            @Override
            public void onSuccess(JsonObject jsonObject) {
                System.out.println(jsonObject.toString());
            }

            @Override
            public void onError(Throwable e) {
                e.printStackTrace();
            }
        });
    }

    // ...
}