text: 'use strict';
  
  /**
   * count_indexed.js
   *
   * Runs count on an indexed field (using hint), which results in an index scan,
   * and verifies the result.
   * Each thread picks a random 'modulus' in range [5, 10]
   * and a random 'countPerNum' in range [50, 100]
   * and then inserts 'modulus * countPerNum' documents. [250, 1000]
   * Each thread inserts docs into a unique collection.
   */
  load('jstests/concurrency/fsm_libs/extend_workload.js');         // for extendWorkload
  load('jstests/concurrency/fsm_workloads/count.js');              // for $config
  load('jstests/concurrency/fsm_workload_helpers/drop_utils.js');  // for dropCollections
  
  var $config = extendWorkload(
      $config,
      function($config, $super) {
          $config.data.prefix = 'count_fsm';
          $config.data.shardKey = {
              tid: 1,
              i: 1
          };
  
          $config.data.getCount = function getCount(db, predicate) {
              var query = Object.extend({tid: this.tid}, predicate);
              return db[this.threadCollName].find(query).hint({tid: 1, i: 1}).count();
          };
  
          $config.states.init = function init(db, collName) {
              this.threadCollName = this.prefix + '_' + this.tid;
              $super.states.init.apply(this, arguments);
              assertAlways.commandWorked(db[this.threadCollName].ensureIndex({tid: 1, i: 1}));
          };
  
          $config.teardown = function teardown(db, collName) {
              var pattern = new RegExp('^' + this.prefix + '_\\d+$');
              dropCollections(db, pattern);
              $super.teardown.apply(this, arguments);
          };
  
          return $config;
      });
  