ServiceDescriptor service = TestService.getDescriptor();
assertEquals(service, file.getServices().get(0));
assertEquals(service, file.findServiceByName("TestService"));
assertNull(file.findServiceByName("NoSuchType"));
assertNull(file.findServiceByName("protobuf_unittest.TestService"));
assertEquals(Collections.emptyList(),
UnittestImport.getDescriptor().getServices());
for (int i = 0; i < file.getServices().size(); i++) {
assertEquals(i, file.getServices().get(i).getIndex());
}