@Test
public void testUseCacheMiss() throws Exception {

  UseSharedCacheResourceResponse response =
      new UseSharedCacheResourceResponsePBImpl();
  response.setPath(null);
  when(cProtocol.use(isA(UseSharedCacheResourceRequest.class))).thenReturn(
      response);
  URL newURL = client.use(mock(ApplicationId.class), "key");
  assertNull("The path is not null!", newURL);
}