text: load('jstests/aggregation/extras/utils.js');
  
  (function() {
      'use strict';
  
      var t = db.dbadmin;
      t.save({x: 1});
      t.save({x: 1});
  
      var res = db.adminCommand("listDatabases");
      assert(res.databases && res.databases.length > 0, "listDatabases: " + tojson(res));
  
      var res = db.adminCommand({listDatabases: 1, nameOnly: true});
      assert(res.databases && res.databases.length > 0 && res.totalSize === undefined,
             "listDatabases nameOnly: " + tojson(res));
  
      var now = new Date();
      var x = db._adminCommand("ismaster");
      assert(x.ismaster, "ismaster failed: " + tojson(x));
      assert(x.localTime, "ismaster didn't include time: " + tojson(x));
  
      var localTimeSkew = x.localTime - now;
      if (localTimeSkew >= 50) {
          print("Warning: localTimeSkew " + localTimeSkew + " > 50ms.");
      }
      assert.lt(localTimeSkew, 500, "isMaster.localTime");
  
      var before = db.runCommand("serverStatus");
      print(before.uptimeEstimate);
      sleep(5000);
  
      var after = db.runCommand("serverStatus");
      print(after.uptimeEstimate);
      assert.gte(
          after.uptimeEstimate, before.uptimeEstimate, "uptime estimate should be non-decreasing");
  
  })();
  