static void
test_find_and_modify_opts (void)
{
   mock_server_t *server;
   mongoc_client_t *client;
   mongoc_collection_t *collection;
   bson_error_t error;
   mongoc_find_and_modify_opts_t *opts;
   future_t *future;
   request_t *request;

   server = mock_server_with_autoismaster (0);
   mock_server_run (server);

   client = mongoc_client_new_from_uri (mock_server_get_uri (server));
   collection = mongoc_client_get_collection (client, "db", "collection");

   opts = mongoc_find_and_modify_opts_new ();
   assert (mongoc_find_and_modify_opts_set_max_time_ms (opts, 42));
   assert (mongoc_find_and_modify_opts_append (opts, tmp_bson ("{'foo': 1}")));

   future = future_collection_find_and_modify_with_opts (
      collection, tmp_bson ("{}"), opts, NULL, &error);
   request = mock_server_receives_command (
      server, "db", MONGOC_QUERY_NONE,
      "{'findAndModify': 'collection', 'maxTimeMS': 42, 'foo': 1}");
   mock_server_replies_ok_and_destroys (request);
   ASSERT_OR_PRINT (future_get_bool (future), error);

   future_destroy (future);
   mongoc_find_and_modify_opts_destroy (opts);
   mongoc_collection_destroy (collection);
   mongoc_client_destroy (client);
   mock_server_destroy (server);
}
static void
test_find_and_modify_collation (int wire)
{
   mock_server_t *server;
   mongoc_client_t *client;
   mongoc_collection_t *collection;
   bson_error_t error;
   mongoc_find_and_modify_opts_t *opts;
   future_t *future;
   request_t *request;
   bson_t *collation;

   server = mock_server_with_autoismaster (wire);
   mock_server_run (server);

   client = mongoc_client_new_from_uri (mock_server_get_uri (server));
   collection = mongoc_client_get_collection (client, "db", "collection");


   collation = BCON_NEW ("collation",
                         "{",
                         "locale",
                         BCON_UTF8 ("en_US"),
                         "caseFirst",
                         BCON_UTF8 ("lower"),
                         "}");
   opts = mongoc_find_and_modify_opts_new ();
   mongoc_find_and_modify_opts_append (opts, collation);

   if (wire >= WIRE_VERSION_COLLATION) {
      future = future_collection_find_and_modify_with_opts (
         collection, tmp_bson ("{}"), opts, NULL, &error);

      request = mock_server_receives_command (
         server,
         "db",
         MONGOC_QUERY_NONE,
         "{'findAndModify': 'collection',"
         " 'collation': { 'locale': 'en_US', 'caseFirst': 'lower'}"
         "}");
      mock_server_replies_ok_and_destroys (request);
      ASSERT_OR_PRINT (future_get_bool (future), error);
      future_destroy (future);
   } else {
      bool ok = mongoc_collection_find_and_modify_with_opts (
         collection, tmp_bson ("{}"), opts, NULL, &error);

      ASSERT_ERROR_CONTAINS (error,
                             MONGOC_ERROR_COMMAND,
                             MONGOC_ERROR_PROTOCOL_BAD_WIRE_VERSION,
                             "The selected server does not support collation");
      ASSERT (!ok);
   }

   bson_destroy (collation);
   mongoc_find_and_modify_opts_destroy (opts);
   mongoc_collection_destroy (collection);
   mongoc_client_destroy (client);

   mock_server_destroy (server);
}