@Test
public void baseHttpUrlPropagated() {

    HttpUrl url = HttpUrl.parse("http://example.com/");
    RetroProxy retroProxy = new RetroProxy.Builder()
            .baseUrl(url)
            .build();
    HttpUrl baseUrl = retroProxy.baseUrl();
    assertThat(baseUrl).isNotNull();
    assertThat(baseUrl).isSameAs(url);
}