docs: function setup(testCacheEnabled) {
    const promises = [],
      cacheEnabled = testCacheEnabled || CACHE_ENABLED;
  
    promises.push(postgres.setup().then(resp => logConnectionSuccess('Postgres', resp)));
  
    // only create redis client if caching is enabled
    if (cacheEnabled) {
      promises.push(redis.createClient().then(resp => logConnectionSuccess('Redis', resp)));
    }
  
    return Promise.all(promises).catch(logConnectionError);
  }