source: class SpoolingCallableTest {
  
    private MockServerStreamingCallable<String, String> upstream;
    private SpoolingCallable<String, String> callable;
  
    @Test
    public void testNoResults() throws Exception {
  
target:     ApiFuture<List<String>> result = callable.futureCall("request");
      MockServerStreamingCall<String, String> call = upstream.popLastCall();
  
      call.getController().getObserver().onComplete();
  
      Truth.assertThat(result.get()).isEmpty();
    }
  
  }