@Test
public void baseUrlStringPropagated() {

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