react-relay/lib/isRelayEnvironment.js

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * 
 * @format
 */
// flowlint ambiguous-object-type:error
'use strict';
/**
 * Determine if a given value is an object that implements the `Environment`
 * interface defined in `RelayEnvironmentTypes`.
 */

function isRelayEnvironment(environment) {
  return typeof environment === 'object' && environment !== null && // TODO: add applyMutation/sendMutation once ready in both cores
  typeof environment.check === 'function' && typeof environment.lookup === 'function' && typeof environment.retain === 'function' && typeof environment.execute === 'function' && typeof environment.subscribe === 'function';
}

module.exports = isRelayEnvironment;