Tests adding settings.
function testAddSetting() {
// Add a file in order to test default settings.
drupal_add_library('system', 'drupalSettings');
$javascript = drupal_add_js();
$last_settings = reset($javascript['settings']['data']);
$this
->assertTrue($last_settings['currentPath'], 'The current path JavaScript setting is set correctly.');
$javascript = drupal_add_js(array(
'drupal' => 'rocks',
'dries' => 280342800,
), 'setting');
$last_settings = end($javascript['settings']['data']);
$this
->assertEqual(280342800, $last_settings['dries'], 'JavaScript setting is set correctly.');
$this
->assertEqual('rocks', $last_settings['drupal'], 'The other JavaScript setting is set correctly.');
}