old_contents: import redis from 'redis';
  import Config from '../config';
  
  let RedisPusher;
  let RedisListener;
  
  const retry_strategy = function (options) {
      if (options.error) {
          // End reconnecting on a specific error and flush all commands with a individual error
          console.error('Connection to Redis Server refused. Retrying again in 30s');
          console.error(JSON.stringify(options.error));
          // return new Error('The server refused the connection');
      }
  
      return 1000 * 30;
      // reconnect after
      // return Math.min(options.attempt * 100, 30000);
  };
  
  export function getRedisPusher() {
      if (!RedisPusher) {
          RedisPusher = redis.createClient(
              _.extend(Config.redis, {retry_strategy})
          );
      }
  
      return RedisPusher;
  }
  
  export function getRedisListener() {
      if (!RedisListener) {
          RedisListener = redis.createClient(
              _.extend(Config.redis, {retry_strategy})
          );
      }
  
      return RedisListener;
  }
  
new_contents: import redis from 'redis';
  import Config from '../config';
  import { _ } from 'meteor/underscore';
  
  let RedisPusher;
  let RedisListener;
  
  const retry_strategy = function (options) {
      if (options.error) {
          // End reconnecting on a specific error and flush all commands with a individual error
          console.error('Connection to Redis Server refused. Retrying again in 30s');
          console.error(JSON.stringify(options.error));
          // return new Error('The server refused the connection');
      }
  
      return 1000 * 30;
      // reconnect after
      // return Math.min(options.attempt * 100, 30000);
  };
  
  export function getRedisPusher() {
      if (!RedisPusher) {
          RedisPusher = redis.createClient(
              _.extend(Config.redis, {retry_strategy})
          );
      }
  
      return RedisPusher;
  }
  
  export function getRedisListener() {
      if (!RedisListener) {
          RedisListener = redis.createClient(
              _.extend(Config.redis, {retry_strategy})
          );
      }
  
      return RedisListener;
  }
  
subject: fix missing underscore import for test passing