function FormsTestCase::testRequiredFields in Drupal 7

Check several empty values for required forms elements.

Carriage returns, tabs, spaces, and unchecked checkbox elements are not valid content for a required field.

If the form field is found in form_get_errors() then the test pass.

File

modules/simpletest/tests/form.test, line 30

Unit tests for the Drupal Form API.

Class

FormsTestCase

@file Unit tests for the Drupal Form API.

Code

function testRequiredFields() {

  // Originates from http://drupal.org/node/117748
  // Sets of empty strings and arrays.
  $empty_strings = array(
    '""' => "",
    '"\\n"' => "\n",
    '" "' => " ",
    '"\\t"' => "\t",
    '" \\n\\t "' => " \n\t ",
    '"\\n\\n\\n\\n\\n"' => "\n\n\n\n\n",
  );
  $empty_arrays = array(
    'array()' => array(),
  );
  $empty_checkbox = array(
    NULL,
  );
  $elements['textfield']['element'] = array(
    '#title' => $this
      ->randomName(),
    '#type' => 'textfield',
  );
  $elements['textfield']['empty_values'] = $empty_strings;
  $elements['password']['element'] = array(
    '#title' => $this
      ->randomName(),
    '#type' => 'password',
  );
  $elements['password']['empty_values'] = $empty_strings;
  $elements['password_confirm']['element'] = array(
    '#title' => $this
      ->randomName(),
    '#type' => 'password_confirm',
  );

  // Provide empty values for both password fields.
  foreach ($empty_strings as $key => $value) {
    $elements['password_confirm']['empty_values'][$key] = array(
      'pass1' => $value,
      'pass2' => $value,
    );
  }
  $elements['textarea']['element'] = array(
    '#title' => $this
      ->randomName(),
    '#type' => 'textarea',
  );
  $elements['textarea']['empty_values'] = $empty_strings;
  $elements['radios']['element'] = array(
    '#title' => $this
      ->randomName(),
    '#type' => 'radios',
    '#options' => array(
      '' => t('None'),
      $this
        ->randomName(),
      $this
        ->randomName(),
      $this
        ->randomName(),
    ),
  );
  $elements['radios']['empty_values'] = $empty_arrays;
  $elements['checkbox']['element'] = array(
    '#title' => $this
      ->randomName(),
    '#type' => 'checkbox',
    '#required' => TRUE,
  );
  $elements['checkbox']['empty_values'] = $empty_checkbox;
  $elements['checkboxes']['element'] = array(
    '#title' => $this
      ->randomName(),
    '#type' => 'checkboxes',
    '#options' => array(
      $this
        ->randomName(),
      $this
        ->randomName(),
      $this
        ->randomName(),
    ),
  );
  $elements['checkboxes']['empty_values'] = $empty_arrays;
  $elements['select']['element'] = array(
    '#title' => $this
      ->randomName(),
    '#type' => 'select',
    '#options' => array(
      '' => t('None'),
      $this
        ->randomName(),
      $this
        ->randomName(),
      $this
        ->randomName(),
    ),
  );
  $elements['select']['empty_values'] = $empty_strings;
  $elements['file']['element'] = array(
    '#title' => $this
      ->randomName(),
    '#type' => 'file',
  );
  $elements['file']['empty_values'] = $empty_strings;

  // Regular expression to find the expected marker on required elements.
  $required_marker_preg = '@<label.*<span class="form-required" title="This field is required\\.">\\*</span></label>@';

  // Go through all the elements and all the empty values for them.
  foreach ($elements as $type => $data) {
    foreach ($data['empty_values'] as $key => $empty) {
      foreach (array(
        TRUE,
        FALSE,
      ) as $required) {
        $form_id = $this
          ->randomName();
        $form = array();
        $form_state = form_state_defaults();
        form_clear_error();
        $form['op'] = array(
          '#type' => 'submit',
          '#value' => t('Submit'),
        );
        $element = $data['element']['#title'];
        $form[$element] = $data['element'];
        $form[$element]['#required'] = $required;
        $form_state['input'][$element] = $empty;
        $form_state['input']['form_id'] = $form_id;
        $form_state['method'] = 'post';

        // The form token CSRF protection should not interfere with this test,
        // so we bypass it by marking this test form as programmed.
        $form_state['programmed'] = TRUE;
        drupal_prepare_form($form_id, $form, $form_state);
        drupal_process_form($form_id, $form, $form_state);
        $errors = form_get_errors();

        // Form elements of type 'radios' throw all sorts of PHP notices
        // when you try to render them like this, so we ignore those for
        // testing the required marker.
        // @todo Fix this work-around (http://drupal.org/node/588438).
        $form_output = $type == 'radios' ? '' : drupal_render($form);
        if ($required) {

          // Make sure we have a form error for this element.
          $this
            ->assertTrue(isset($errors[$element]), "Check empty({$key}) '{$type}' field '{$element}'");
          if (!empty($form_output)) {

            // Make sure the form element is marked as required.
            $this
              ->assertTrue(preg_match($required_marker_preg, $form_output), "Required '{$type}' field is marked as required");
          }
        }
        else {
          if (!empty($form_output)) {

            // Make sure the form element is *not* marked as required.
            $this
              ->assertFalse(preg_match($required_marker_preg, $form_output), "Optional '{$type}' field is not marked as required");
          }
          if ($type == 'select') {

            // Select elements are going to have validation errors with empty
            // input, since those are illegal choices. Just make sure the
            // error is not "field is required".
            $this
              ->assertTrue(empty($errors[$element]) || strpos('field is required', $errors[$element]) === FALSE, "Optional '{$type}' field '{$element}' is not treated as a required element");
          }
          else {

            // Make sure there is *no* form error for this element.
            $this
              ->assertTrue(empty($errors[$element]), "Optional '{$type}' field '{$element}' has no errors with empty input");
          }
        }
      }
    }
  }

  // Clear the expected form error messages so they don't appear as exceptions.
  drupal_get_messages();
}