'use strict';
var $ = require('../internals/export');
var isObject = require('../internals/is-object');

var DELEGATES_TO_EXEC = function () {
  var execCalled = false;
  var re = /[ac]/;
  re.exec = function () {
    execCalled = true;
    return /./.exec.apply(this, arguments);
  };
  return re.test('abc') === true && execCalled;
}();

var nativeTest = /./.test;

$({ target: 'RegExp', proto: true, forced: !DELEGATES_TO_EXEC }, {
  test: function (str) {
    if (typeof this.exec !== 'function') {
      return nativeTest.call(this, str);
    }
    var result = this.exec(str);
    if (result !== null && !isObject(result)) {
      throw new Error('RegExp exec method returned something other than an Object or null');
    }
    return !!result;
  }
});
