text: 'use strict';
  
  /**
   * auth_create_user.js
   *
   * Repeatedly creates new users on a database.
   */
  load('jstests/concurrency/fsm_workload_helpers/drop_utils.js');  // for dropUsers
  
  var $config = (function() {
  
      var data = {
          // Use the workload name as a prefix for the username,
          // since the workload name is assumed to be unique.
          prefix: 'auth_create_user'
      };
  
      var states = (function() {
  
          function uniqueUsername(prefix, tid, num) {
              return prefix + tid + '_' + num;
          }
  
          function init(db, collName) {
              this.num = 0;
          }
  
          function createUser(db, collName) {
              var username = uniqueUsername(this.prefix, this.tid, this.num++);
              db.createUser({user: username, pwd: 'password', roles: ['readWrite', 'dbAdmin']});
  
              // Verify the newly created user exists, as well as all previously created users
              for (var i = 0; i < this.num; ++i) {
                  var name = uniqueUsername(this.prefix, this.tid, i);
                  var res = db.getUser(username);
                  assertAlways(res !== null, "user '" + username + "' should exist");
                  assertAlways.eq(username, res.user);
                  assertAlways.eq(db.getName(), res.db);
              }
          }
  
          return {
              init: init,
              createUser: createUser
          };
  
      })();
  
      var transitions = {
          init: {createUser: 1},
          createUser: {createUser: 1}
      };
  
      function teardown(db, collName, cluster) {
          var pattern = new RegExp('^' + this.prefix + '\\d+_\\d+$');
          dropUsers(db, pattern);
      }
  
      return {
          threadCount: 10,
          iterations: 20,
          data: data,
          states: states,
          transitions: transitions,
          teardown: teardown
      };
  
  })();
  