gentelella/vendors/select2/tests/integration/jquery-calls.js

module('select2(val)');

test('multiple elements with arguments works', function (assert) {
  var $ = require('jquery');
  require('jquery.select2');

  var $first = $(
    '<select>' +
      '<option>1</option>' +
      '<option>2</option>' +
    '</select>'
  );
  var $second = $first.clone();

  var $both = $first.add($second);
  $both.select2();

  $both.select2('val', '2');

  assert.equal(
    $first.val(),
    '2',
    'The call should change the value on the first element'
  );
  assert.equal(
    $second.val(),
    '2',
    'The call should also change the value on the second element'
  );
});