'use strict';

/**
 * explain_group.js
 *
 * Runs explain() and group() on a collection.
 *
 */
load('jstests/concurrency/fsm_libs/extend_workload.js');  // for extendWorkload
load('jstests/concurrency/fsm_workloads/explain.js');  // for $config
load('jstests/libs/analyze_plan.js');  // for planHasStage

var $config =
    extendWorkload($config,
                   function($config, $super) {

                       $config.states = Object.extend(
                           {
                             explainBasicGroup: function explainBasicGroup(db, collName) {
                                 var res = db[collName].explain().group(
                                     {key: {i: 1}, initial: {}, reduce: function() {}});
                                 assertAlways.commandWorked(res);
                             }
                           },
                           $super.states);

                       $config.transitions = Object.extend(
                           {explain: $config.data.assignEqualProbsToTransitions($config.states)},
                           $super.transitions);

                       return $config;
                   });