'use strict';

// Tests below are not from WPT.

require('../common');
const assert = require('assert');
const URLSearchParams = require('url').URLSearchParams;

{
  const params = new URLSearchParams();
  assert.throws(() => {
    params.toString.call(undefined);
  }, {
    code: 'ERR_INVALID_THIS',
    name: 'TypeError',
    message: 'Value of "this" must be of type URLSearchParams'
  });
}