<?php

/**
 * @file
 * Unit tests for the Drupal Form API.
 */

class FormsTestCase extends DrupalWebTestCase {

  public static function getInfo() {
    return array(
      'name' => 'Form element validation',
      'description' => 'Tests various form element validation mechanisms.',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp('form_test');
  }

  /**
   * 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.
   */
  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();
  }

  /**
   * Tests validation for required checkbox, select, and radio elements.
   *
   * Submits a test form containing several types of form elements. The form
   * is submitted twice, first without values for required fields and then
   * with values. Each submission is checked for relevant error messages.
   *
   * @see form_test_validate_required_form()
   */
  function testRequiredCheckboxesRadio() {
    $form = $form_state = array();
    $form = form_test_validate_required_form($form, $form_state);

    // Attempt to submit the form with no required fields set.
    $edit = array();
    $this->drupalPost('form-test/validate-required', $edit, 'Submit');

    // The only error messages that should appear are the relevant 'required'
    // messages for each field.
    $expected = array();
    foreach (array('textfield', 'checkboxes', 'select', 'radios') as $key) {
      $expected[] = t('!name field is required.', array('!name' => $form[$key]['#title']));
    }

    // Check the page for error messages.
    $errors = $this->xpath('//div[contains(@class, "error")]//li');
    foreach ($errors as $error) {
      $expected_key = array_search($error[0], $expected);
      // If the error message is not one of the expected messages, fail.
      if ($expected_key === FALSE) {
        $this->fail(format_string("Unexpected error message: @error", array('@error' => $error[0])));
      }
      // Remove the expected message from the list once it is found.
      else {
        unset($expected[$expected_key]);
      }
    }

    // Fail if any expected messages were not found.
    foreach ($expected as $not_found) {
      $this->fail(format_string("Found error message: @error", array('@error' => $not_found)));
    }

    // Verify that input elements are still empty.
    $this->assertFieldByName('textfield', '');
    $this->assertNoFieldChecked('edit-checkboxes-foo');
    $this->assertNoFieldChecked('edit-checkboxes-bar');
    $this->assertOptionSelected('edit-select', '');
    $this->assertNoFieldChecked('edit-radios-foo');
    $this->assertNoFieldChecked('edit-radios-bar');
    $this->assertNoFieldChecked('edit-radios-optional-foo');
    $this->assertNoFieldChecked('edit-radios-optional-bar');
    $this->assertNoFieldChecked('edit-radios-optional-default-value-false-foo');
    $this->assertNoFieldChecked('edit-radios-optional-default-value-false-bar');

    // Submit again with required fields set and verify that there are no
    // error messages.
    $edit = array(
      'textfield' => $this->randomString(),
      'checkboxes[foo]' => TRUE,
      'select' => 'foo',
      'radios' => 'bar',
    );
    $this->drupalPost(NULL, $edit, 'Submit');
    $this->assertNoFieldByXpath('//div[contains(@class, "error")]', FALSE, 'No error message is displayed when all required fields are filled.');
    $this->assertRaw("The form_test_validate_required_form form was submitted successfully.", 'Validation form submitted successfully.');
  }

  /**
   * Tests validation for required textfield element without title.
   *
   * Submits a test form containing a textfield form elements without title.
   * The form is submitted twice, first without value for the required field
   * and then with value. Each submission is checked for relevant error
   * messages.
   *
   * @see form_test_validate_required_form_no_title()
   */
  function testRequiredTextfieldNoTitle() {
    $form = $form_state = array();
    $form = form_test_validate_required_form_no_title($form, $form_state);

    // Attempt to submit the form with no required field set.
    $edit = array();
    $this->drupalPost('form-test/validate-required-no-title', $edit, 'Submit');
    $this->assertNoRaw("The form_test_validate_required_form_no_title form was submitted successfully.", 'Validation form submitted successfully.');

    // Check the page for the error class on the textfield.
    $this->assertFieldByXPath('//input[contains(@class, "error")]', FALSE, 'Error input form element class found.');

    // Submit again with required fields set and verify that there are no
    // error messages.
    $edit = array(
      'textfield' => $this->randomString(),
    );
    $this->drupalPost(NULL, $edit, 'Submit');
    $this->assertNoFieldByXpath('//input[contains(@class, "error")]', FALSE, 'No error input form element class found.');
    $this->assertRaw("The form_test_validate_required_form_no_title form was submitted successfully.", 'Validation form submitted successfully.');
  }

  /**
   * Test default value handling for checkboxes.
   *
   * @see _form_test_checkbox()
   */
  function testCheckboxProcessing() {
    // First, try to submit without the required checkbox.
    $edit = array();
    $this->drupalPost('form-test/checkbox', $edit, t('Submit'));
    $this->assertRaw(t('!name field is required.', array('!name' => 'required_checkbox')), 'A required checkbox is actually mandatory');

    // Now try to submit the form correctly.
    $values = drupal_json_decode($this->drupalPost(NULL, array('required_checkbox' => 1), t('Submit')));
    $expected_values = array(
      'disabled_checkbox_on' => 'disabled_checkbox_on',
      'disabled_checkbox_off' => '',
      'checkbox_on' => 'checkbox_on',
      'checkbox_off' => '',
      'zero_checkbox_on' => '0',
      'zero_checkbox_off' => '',
    );
    foreach ($expected_values as $widget => $expected_value) {
      $this->assertEqual($values[$widget], $expected_value, format_string('Checkbox %widget returns expected value (expected: %expected, got: %value)', array(
        '%widget' => var_export($widget, TRUE),
        '%expected' => var_export($expected_value, TRUE),
        '%value' => var_export($values[$widget], TRUE),
      )));
    }
  }

  /**
   * Tests validation of #type 'select' elements.
   */
  function testSelect() {
    $form = $form_state = array();
    $form = form_test_select($form, $form_state);
    $error = '!name field is required.';
    $this->drupalGet('form-test/select');

    // Posting without any values should throw validation errors.
    $this->drupalPost(NULL, array(), 'Submit');
    $this->assertNoText(t($error, array('!name' => $form['select']['#title'])));
    $this->assertNoText(t($error, array('!name' => $form['select_required']['#title'])));
    $this->assertNoText(t($error, array('!name' => $form['select_optional']['#title'])));
    $this->assertNoText(t($error, array('!name' => $form['empty_value']['#title'])));
    $this->assertNoText(t($error, array('!name' => $form['empty_value_one']['#title'])));
    $this->assertText(t($error, array('!name' => $form['no_default']['#title'])));
    $this->assertNoText(t($error, array('!name' => $form['no_default_optional']['#title'])));
    $this->assertText(t($error, array('!name' => $form['no_default_empty_option']['#title'])));
    $this->assertNoText(t($error, array('!name' => $form['no_default_empty_option_optional']['#title'])));
    $this->assertText(t($error, array('!name' => $form['no_default_empty_value']['#title'])));
    $this->assertText(t($error, array('!name' => $form['no_default_empty_value_one']['#title'])));
    $this->assertNoText(t($error, array('!name' => $form['no_default_empty_value_optional']['#title'])));
    $this->assertNoText(t($error, array('!name' => $form['multiple']['#title'])));
    $this->assertNoText(t($error, array('!name' => $form['multiple_no_default']['#title'])));
    $this->assertText(t($error, array('!name' => $form['multiple_no_default_required']['#title'])));

    // Post values for required fields.
    $edit = array(
      'no_default' => 'three',
      'no_default_empty_option' => 'three',
      'no_default_empty_value' => 'three',
      'no_default_empty_value_one' => 'three',
      'multiple_no_default_required[]' => 'three',
    );
    $this->drupalPost(NULL, $edit, 'Submit');
    $values = drupal_json_decode($this->drupalGetContent());

    // Verify expected values.
    $expected = array(
      'select' => 'one',
      'empty_value' => 'one',
      'empty_value_one' => 'one',
      'no_default' => 'three',
      'no_default_optional' => 'one',
      'no_default_optional_empty_value' => '',
      'no_default_empty_option' => 'three',
      'no_default_empty_option_optional' => '',
      'no_default_empty_value' => 'three',
      'no_default_empty_value_one' => 'three',
      'no_default_empty_value_optional' => 0,
      'multiple' => array('two' => 'two'),
      'multiple_no_default' => array(),
      'multiple_no_default_required' => array('three' => 'three'),
    );
    foreach ($expected as $key => $value) {
      $this->assertIdentical($values[$key], $value, format_string('@name: @actual is equal to @expected.', array(
        '@name' => $key,
        '@actual' => var_export($values[$key], TRUE),
        '@expected' => var_export($value, TRUE),
      )));
    }
  }

  /**
   * Test handling of disabled elements.
   *
   * @see _form_test_disabled_elements()
   */
  function testDisabledElements() {
    // Get the raw form in its original state.
    $form_state = array();
    $form = _form_test_disabled_elements(array(), $form_state);

    // Build a submission that tries to hijack the form by submitting input for
    // elements that are disabled.
    $edit = array();
    foreach (element_children($form) as $key) {
      if (isset($form[$key]['#test_hijack_value'])) {
        if (is_array($form[$key]['#test_hijack_value'])) {
          foreach ($form[$key]['#test_hijack_value'] as $subkey => $value) {
            $edit[$key . '[' . $subkey . ']'] = $value;
          }
        }
        else {
          $edit[$key] = $form[$key]['#test_hijack_value'];
        }
      }
    }

    // Submit the form with no input, as the browser does for disabled elements,
    // and fetch the $form_state['values'] that is passed to the submit handler.
    $this->drupalPost('form-test/disabled-elements', array(), t('Submit'));
    $returned_values['normal'] = drupal_json_decode($this->content);

    // Do the same with input, as could happen if JavaScript un-disables an
    // element. drupalPost() emulates a browser by not submitting input for
    // disabled elements, so we need to un-disable those elements first.
    $this->drupalGet('form-test/disabled-elements');
    $disabled_elements = array();
    foreach ($this->xpath('//*[@disabled]') as $element) {
      $disabled_elements[] = (string) $element['name'];
      unset($element['disabled']);
    }

    // All the elements should be marked as disabled, including the ones below
    // the disabled container.
    $this->assertEqual(count($disabled_elements), 32, 'The correct elements have the disabled property in the HTML code.');

    $this->drupalPost(NULL, $edit, t('Submit'));
    $returned_values['hijacked'] = drupal_json_decode($this->content);

    // Ensure that the returned values match the form's default values in both
    // cases.
    foreach ($returned_values as $type => $values) {
      $this->assertFormValuesDefault($values, $form);
    }
  }

  /**
   * Assert that the values submitted to a form matches the default values of the elements.
   */
  function assertFormValuesDefault($values, $form) {
    foreach (element_children($form) as $key) {
      if (isset($form[$key]['#default_value'])) {
        if (isset($form[$key]['#expected_value'])) {
          $expected_value = $form[$key]['#expected_value'];
        }
        else {
          $expected_value = $form[$key]['#default_value'];
        }

        if ($key == 'checkboxes_multiple') {
          // Checkboxes values are not filtered out.
          $values[$key] = array_filter($values[$key]);
        }
        $this->assertIdentical($expected_value, $values[$key], format_string('Default value for %type: expected %expected, returned %returned.', array('%type' => $key, '%expected' => var_export($expected_value, TRUE), '%returned' => var_export($values[$key], TRUE))));
      }

      // Recurse children.
      $this->assertFormValuesDefault($values, $form[$key]);
    }
  }

  /**
   * Verify markup for disabled form elements.
   *
   * @see _form_test_disabled_elements()
   */
  function testDisabledMarkup() {
    $this->drupalGet('form-test/disabled-elements');
    $form_state = array();
    $form = _form_test_disabled_elements(array(), $form_state);
    $type_map = array(
      'textarea' => 'textarea',
      'select' => 'select',
      'weight' => 'select',
      'date' => 'select',
    );

    foreach ($form as $name => $item) {
      // Skip special #types.
      if (!isset($item['#type']) || in_array($item['#type'], array('hidden', 'text_format'))) {
        continue;
      }
      // Setup XPath and CSS class depending on #type.
      if (in_array($item['#type'], array('image_button', 'button', 'submit'))) {
        $path = "//!type[contains(@class, :div-class) and @value=:value]";
        $class = 'form-button-disabled';
      }
      else {
        // starts-with() required for checkboxes.
        $path = "//div[contains(@class, :div-class)]/descendant::!type[starts-with(@name, :name)]";
        $class = 'form-disabled';
      }
      // Replace DOM element name in $path according to #type.
      $type = 'input';
      if (isset($type_map[$item['#type']])) {
        $type = $type_map[$item['#type']];
      }
      $path = strtr($path, array('!type' => $type));
      // Verify that the element exists.
      $element = $this->xpath($path, array(
        ':name' => check_plain($name),
        ':div-class' => $class,
        ':value' => isset($item['#value']) ? $item['#value'] : '',
      ));
      $this->assertTrue(isset($element[0]), format_string('Disabled form element class found for #type %type.', array('%type' => $item['#type'])));
    }

    // Verify special element #type text-format.
    $element = $this->xpath('//div[contains(@class, :div-class)]/descendant::textarea[@name=:name]', array(
      ':name' => 'text_format[value]',
      ':div-class' => 'form-disabled',
    ));
    $this->assertTrue(isset($element[0]), format_string('Disabled form element class found for #type %type.', array('%type' => 'text_format[value]')));
    $element = $this->xpath('//div[contains(@class, :div-class)]/descendant::select[@name=:name]', array(
      ':name' => 'text_format[format]',
      ':div-class' => 'form-disabled',
    ));
    $this->assertTrue(isset($element[0]), format_string('Disabled form element class found for #type %type.', array('%type' => 'text_format[format]')));
  }

  /**
   * Test Form API protections against input forgery.
   *
   * @see _form_test_input_forgery()
   */
  function testInputForgery() {
    $this->drupalGet('form-test/input-forgery');
    $checkbox = $this->xpath('//input[@name="checkboxes[two]"]');
    $checkbox[0]['value'] = 'FORGERY';
    $this->drupalPost(NULL, array('checkboxes[one]' => TRUE, 'checkboxes[two]' => TRUE), t('Submit'));
    $this->assertText('An illegal choice has been detected.', 'Input forgery was detected.');
  }

  /**
   * Tests that submitted values are converted to scalar strings for textfields.
   */
  public function testTextfieldStringValue() {
    // Check multivalued submissions.
    $multivalue = array('evil' => 'multivalue', 'not so' => 'good');
    $this->checkFormValue('textfield', $multivalue, '');
    $this->checkFormValue('password', $multivalue, '');
    $this->checkFormValue('textarea', $multivalue, '');
    $this->checkFormValue('machine_name', $multivalue, '');
    $this->checkFormValue('password_confirm', $multivalue, array('pass1' => '', 'pass2' => ''));
    // Check integer submissions.
    $integer = 5;
    $string = '5';
    $this->checkFormValue('textfield', $integer, $string);
    $this->checkFormValue('password', $integer, $string);
    $this->checkFormValue('textarea', $integer, $string);
    $this->checkFormValue('machine_name', $integer, $string);
    $this->checkFormValue('password_confirm', array('pass1' => $integer, 'pass2' => $integer), array('pass1' => $string, 'pass2' => $string));
    // Check that invalid array keys are ignored for password confirm elements.
    $this->checkFormValue('password_confirm', array('pass1' => 'test', 'pass2' => 'test', 'extra' => 'invalid'), array('pass1' => 'test', 'pass2' => 'test'));
  }

  /**
   * Checks that a given form input value is sanitized to the expected result.
   *
   * @param string $element_type
   *   The form element type. Example: textfield.
   * @param mixed $input_value
   *   The submitted user input value for the form element.
   * @param mixed $expected_value
   *   The sanitized result value in the form state after calling
   *   form_builder().
   */
  protected function checkFormValue($element_type, $input_value, $expected_value) {
    $form_id = $this->randomName();
    $form = array();
    $form_state = form_state_defaults();
    $form['op'] = array('#type' => 'submit', '#value' => t('Submit'));
    $form[$element_type] = array(
      '#type' => $element_type,
      '#title' => 'test',
    );

    $form_state['input'][$element_type] = $input_value;
    $form_state['input']['form_id'] = $form_id;
    $form_state['method'] = 'post';
    $form_state['values'] = array();
    drupal_prepare_form($form_id, $form, $form_state);

    // This is the main function we want to test: it is responsible for
    // populating user supplied $form_state['input'] to sanitized
    // $form_state['values'].
    form_builder($form_id, $form, $form_state);

    $this->assertIdentical($form_state['values'][$element_type], $expected_value, format_string('Form submission for the "@element_type" element type has been correctly sanitized.', array('@element_type' => $element_type)));
  }
}

/**
 * Tests building and processing of core form elements.
 */
class FormElementTestCase extends DrupalWebTestCase {
  protected $profile = 'testing';

  public static function getInfo() {
    return array(
      'name' => 'Element processing',
      'description' => 'Tests building and processing of core form elements.',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp(array('form_test'));
  }

  /**
   * Tests expansion of #options for #type checkboxes and radios.
   */
  function testOptions() {
    $this->drupalGet('form-test/checkboxes-radios');

    // Verify that all options appear in their defined order.
    foreach (array('checkbox', 'radio') as $type) {
      $elements = $this->xpath('//input[@type=:type]', array(':type' => $type));
      $expected_values = array('0', 'foo', '1', 'bar', '>');
      foreach ($elements as $element) {
        $expected = array_shift($expected_values);
        $this->assertIdentical((string) $element['value'], $expected);
      }
    }

    // Enable customized option sub-elements.
    $this->drupalGet('form-test/checkboxes-radios/customize');

    // Verify that all options appear in their defined order, taking a custom
    // #weight into account.
    foreach (array('checkbox', 'radio') as $type) {
      $elements = $this->xpath('//input[@type=:type]', array(':type' => $type));
      $expected_values = array('0', 'foo', 'bar', '>', '1');
      foreach ($elements as $element) {
        $expected = array_shift($expected_values);
        $this->assertIdentical((string) $element['value'], $expected);
      }
    }
    // Verify that custom #description properties are output.
    foreach (array('checkboxes', 'radios') as $type) {
      $elements = $this->xpath('//input[@id=:id]/following-sibling::div[@class=:class]', array(
        ':id' => 'edit-' . $type . '-foo',
        ':class' => 'description',
      ));
      $this->assertTrue(count($elements), format_string('Custom %type option description found.', array(
        '%type' => $type,
      )));
    }
  }
}

/**
 * Test form alter hooks.
 */
class FormAlterTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Form alter hooks',
      'description' => 'Tests hook_form_alter() and hook_form_FORM_ID_alter().',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp('form_test');
  }

  /**
   * Tests execution order of hook_form_alter() and hook_form_FORM_ID_alter().
   */
  function testExecutionOrder() {
    $this->drupalGet('form-test/alter');
    // Ensure that the order is first by module, then for a given module, the
    // id-specific one after the generic one.
    $expected = array(
      'block_form_form_test_alter_form_alter() executed.',
      'form_test_form_alter() executed.',
      'form_test_form_form_test_alter_form_alter() executed.',
      'system_form_form_test_alter_form_alter() executed.',
    );
    $content = preg_replace('/\s+/', ' ', filter_xss($this->content, array()));
    $this->assert(strpos($content, implode(' ', $expected)) !== FALSE, 'Form alter hooks executed in the expected order.');
  }
}

/**
 * Test form validation handlers.
 */
class FormValidationTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Form validation handlers',
      'description' => 'Tests form processing and alteration via form validation handlers.',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp('form_test');
  }

  /**
   * Tests form alterations by #element_validate, #validate, and form_set_value().
   */
  function testValidate() {
    $this->drupalGet('form-test/validate');
    // Verify that #element_validate handlers can alter the form and submitted
    // form values.
    $edit = array(
      'name' => 'element_validate',
    );
    $this->drupalPost(NULL, $edit, 'Save');
    $this->assertFieldByName('name', '#value changed by #element_validate', 'Form element #value was altered.');
    $this->assertText('Name value: value changed by form_set_value() in #element_validate', 'Form element value in $form_state was altered.');

    // Verify that #validate handlers can alter the form and submitted
    // form values.
    $edit = array(
      'name' => 'validate',
    );
    $this->drupalPost(NULL, $edit, 'Save');
    $this->assertFieldByName('name', '#value changed by #validate', 'Form element #value was altered.');
    $this->assertText('Name value: value changed by form_set_value() in #validate', 'Form element value in $form_state was altered.');

    // Verify that #element_validate handlers can make form elements
    // inaccessible, but values persist.
    $edit = array(
      'name' => 'element_validate_access',
    );
    $this->drupalPost(NULL, $edit, 'Save');
    $this->assertNoFieldByName('name', 'Form element was hidden.');
    $this->assertText('Name value: element_validate_access', 'Value for inaccessible form element exists.');

    // Verify that value for inaccessible form element persists.
    $this->drupalPost(NULL, array(), 'Save');
    $this->assertNoFieldByName('name', 'Form element was hidden.');
    $this->assertText('Name value: element_validate_access', 'Value for inaccessible form element exists.');

    // Verify that #validate handlers don't run if the CSRF token is invalid.
    $this->drupalLogin($this->drupalCreateUser());
    $this->drupalGet('form-test/validate');
    $edit = array(
      'name' => 'validate',
      'form_token' => 'invalid token'
    );
    $this->drupalPost(NULL, $edit, 'Save');
    $this->assertNoFieldByName('name', '#value changed by #validate', 'Form element #value was not altered.');
    $this->assertNoText('Name value: value changed by form_set_value() in #validate', 'Form element value in $form_state was not altered.');
    $this->assertText('The form has become outdated. Copy any unsaved work in the form below');
  }

  /**
   * Tests partial form validation through #limit_validation_errors.
   */
  function testValidateLimitErrors() {
    $edit = array(
      'test' => 'invalid',
      'test_numeric_index[0]' => 'invalid',
      'test_substring[foo]' => 'invalid',
    );
    $path = 'form-test/limit-validation-errors';

    // Submit the form by pressing the 'Partial validate' button (uses
    // #limit_validation_errors) and ensure that the title field is not
    // validated, but the #element_validate handler for the 'test' field
    // is triggered.
    $this->drupalPost($path, $edit, t('Partial validate'));
    $this->assertNoText(t('!name field is required.', array('!name' => 'Title')));
    $this->assertText('Test element is invalid');

    // Edge case of #limit_validation_errors containing numeric indexes: same
    // thing with the 'Partial validate (numeric index)' button and the
    // 'test_numeric_index' field.
    $this->drupalPost($path, $edit, t('Partial validate (numeric index)'));
    $this->assertNoText(t('!name field is required.', array('!name' => 'Title')));
    $this->assertText('Test (numeric index) element is invalid');

    // Ensure something like 'foobar' isn't considered "inside" 'foo'.
    $this->drupalPost($path, $edit, t('Partial validate (substring)'));
    $this->assertNoText(t('!name field is required.', array('!name' => 'Title')));
    $this->assertText('Test (substring) foo element is invalid');

    // Ensure not validated values are not available to submit handlers.
    $this->drupalPost($path, array('title' => '', 'test' => 'valid'), t('Partial validate'));
    $this->assertText('Only validated values appear in the form values.');

    // Now test full form validation and ensure that the #element_validate
    // handler is still triggered.
    $this->drupalPost($path, $edit, t('Full validate'));
    $this->assertText(t('!name field is required.', array('!name' => 'Title')));
    $this->assertText('Test element is invalid');
  }

  /**
   *  Tests error border of multiple fields with same name in a page.
   */
  function testMultiFormSameNameErrorClass() {
    $this->drupalGet('form-test/double-form');
    $edit = array();
    $this->drupalPost(NULL, $edit, t('Save'));
    $this->assertFieldByXpath('//input[@id="edit-name" and contains(@class, "error")]', NULL, 'Error input form element class found for first element.');
    $this->assertNoFieldByXpath('//input[@id="edit-name--2" and contains(@class, "error")]', NULL, 'No error input form element class found for second element.');
  }
}

/**
 * Test form element labels, required markers and associated output.
 */
class FormsElementsLabelsTestCase extends DrupalWebTestCase {

  public static function getInfo() {
    return array(
      'name' => 'Form element and label output test',
      'description' => 'Test form element labels, required markers and associated output.',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp('form_test');
  }

  /**
   * Test form elements, labels, title attibutes and required marks output
   * correctly and have the correct label option class if needed.
   */
  function testFormLabels() {
    $this->drupalGet('form_test/form-labels');

    // Check that the checkbox/radio processing is not interfering with
    // basic placement.
    $elements = $this->xpath('//input[@id="edit-form-checkboxes-test-third-checkbox"]/following-sibling::label[@for="edit-form-checkboxes-test-third-checkbox" and @class="option"]');
    $this->assertTrue(isset($elements[0]), "Label follows field and label option class correct for regular checkboxes.");

    // Make sure the label is rendered for checkboxes.
    $elements = $this->xpath('//input[@id="edit-form-checkboxes-test-0"]/following-sibling::label[@for="edit-form-checkboxes-test-0" and @class="option"]');
    $this->assertTrue(isset($elements[0]), "Label 0 found checkbox.");

    $elements = $this->xpath('//input[@id="edit-form-radios-test-second-radio"]/following-sibling::label[@for="edit-form-radios-test-second-radio" and @class="option"]');
    $this->assertTrue(isset($elements[0]), "Label follows field and label option class correct for regular radios.");

    // Make sure the label is rendered for radios.
    $elements = $this->xpath('//input[@id="edit-form-radios-test-0"]/following-sibling::label[@for="edit-form-radios-test-0" and @class="option"]');
    $this->assertTrue(isset($elements[0]), "Label 0 found radios.");

    // Exercise various defaults for checkboxes and modifications to ensure
    // appropriate override and correct behavior.
    $elements = $this->xpath('//input[@id="edit-form-checkbox-test"]/following-sibling::label[@for="edit-form-checkbox-test" and @class="option"]');
    $this->assertTrue(isset($elements[0]), "Label follows field and label option class correct for a checkbox by default.");

    // Exercise various defaults for textboxes and modifications to ensure
    // appropriate override and correct behavior.
    $elements = $this->xpath('//label[@for="edit-form-textfield-test-title-and-required"]/child::span[@class="form-required"]/parent::*/following-sibling::input[@id="edit-form-textfield-test-title-and-required"]');
    $this->assertTrue(isset($elements[0]), "Label precedes textfield, with required marker inside label.");

    $elements = $this->xpath('//input[@id="edit-form-textfield-test-no-title-required"]/preceding-sibling::label[@for="edit-form-textfield-test-no-title-required"]/span[@class="form-required"]');
    $this->assertTrue(isset($elements[0]), "Label tag with required marker precedes required textfield with no title.");

    $elements = $this->xpath('//input[@id="edit-form-textfield-test-title-invisible"]/preceding-sibling::label[@for="edit-form-textfield-test-title-invisible" and @class="element-invisible"]');
    $this->assertTrue(isset($elements[0]), "Label preceding field and label class is element-invisible.");

    $elements = $this->xpath('//input[@id="edit-form-textfield-test-title"]/preceding-sibling::span[@class="form-required"]');
    $this->assertFalse(isset($elements[0]), "No required marker on non-required field.");

    $elements = $this->xpath('//input[@id="edit-form-textfield-test-title-after"]/following-sibling::label[@for="edit-form-textfield-test-title-after" and @class="option"]');
    $this->assertTrue(isset($elements[0]), "Label after field and label option class correct for text field.");

    $elements = $this->xpath('//label[@for="edit-form-textfield-test-title-no-show"]');
    $this->assertFalse(isset($elements[0]), "No label tag when title set not to display.");

    // Check #field_prefix and #field_suffix placement.
    $elements = $this->xpath('//span[@class="field-prefix"]/following-sibling::div[@id="edit-form-radios-test"]');
    $this->assertTrue(isset($elements[0]), "Properly placed the #field_prefix element after the label and before the field.");

    $elements = $this->xpath('//span[@class="field-suffix"]/preceding-sibling::div[@id="edit-form-radios-test"]');
    $this->assertTrue(isset($elements[0]), "Properly places the #field_suffix element immediately after the form field.");

    // Check #prefix and #suffix placement.
    $elements = $this->xpath('//div[@id="form-test-textfield-title-prefix"]/following-sibling::div[contains(@class, \'form-item-form-textfield-test-title\')]');
    $this->assertTrue(isset($elements[0]), "Properly places the #prefix element before the form item.");

    $elements = $this->xpath('//div[@id="form-test-textfield-title-suffix"]/preceding-sibling::div[contains(@class, \'form-item-form-textfield-test-title\')]');
    $this->assertTrue(isset($elements[0]), "Properly places the #suffix element before the form item.");

    // Check title attribute for radios and checkboxes.
    $elements = $this->xpath('//div[@id="edit-form-checkboxes-title-attribute"]');
    $this->assertEqual($elements[0]['title'], 'Checkboxes test' . ' (' . t('Required') . ')', 'Title attribute found.');
    $elements = $this->xpath('//div[@id="edit-form-radios-title-attribute"]');
    $this->assertEqual($elements[0]['title'], 'Radios test' . ' (' . t('Required') . ')', 'Title attribute found.');
  }
}

/**
 * Test the tableselect form element for expected behavior.
 */
class FormsElementsTableSelectFunctionalTest extends DrupalWebTestCase {

  public static function getInfo() {
    return array(
      'name' => 'Tableselect form element type test',
      'description' => 'Test the tableselect element for expected behavior',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp('form_test');
  }


  /**
   * Test the display of checkboxes when #multiple is TRUE.
   */
  function testMultipleTrue() {

    $this->drupalGet('form_test/tableselect/multiple-true');

    $this->assertNoText(t('Empty text.'), 'Empty text should not be displayed.');

    // Test for the presence of the Select all rows tableheader.
    $this->assertFieldByXPath('//th[@class="select-all"]', NULL, 'Presence of the "Select all" checkbox.');

    $rows = array('row1', 'row2', 'row3');
    foreach ($rows as $row) {
      $this->assertFieldByXPath('//input[@type="checkbox"]', $row, format_string('Checkbox for value @row.', array('@row' => $row)));
    }
  }

  /**
   * Test the display of radios when #multiple is FALSE.
   */
  function testMultipleFalse() {
    $this->drupalGet('form_test/tableselect/multiple-false');

    $this->assertNoText(t('Empty text.'), 'Empty text should not be displayed.');

    // Test for the absence of the Select all rows tableheader.
    $this->assertNoFieldByXPath('//th[@class="select-all"]', '', 'Absence of the "Select all" checkbox.');

    $rows = array('row1', 'row2', 'row3');
    foreach ($rows as $row) {
      $this->assertFieldByXPath('//input[@type="radio"]', $row, format_string('Radio button for value @row.', array('@row' => $row)));
    }
  }

  /**
   * Test the display of the #empty text when #options is an empty array.
   */
  function testEmptyText() {
    $this->drupalGet('form_test/tableselect/empty-text');
    $this->assertText(t('Empty text.'), 'Empty text should be displayed.');
  }

  /**
   * Test the submission of single and multiple values when #multiple is TRUE.
   */
  function testMultipleTrueSubmit() {

    // Test a submission with one checkbox checked.
    $edit = array();
    $edit['tableselect[row1]'] = TRUE;
    $this->drupalPost('form_test/tableselect/multiple-true', $edit, 'Submit');

    $this->assertText(t('Submitted: row1 = row1'), 'Checked checkbox row1');
    $this->assertText(t('Submitted: row2 = 0'), 'Unchecked checkbox row2.');
    $this->assertText(t('Submitted: row3 = 0'), 'Unchecked checkbox row3.');

    // Test a submission with multiple checkboxes checked.
    $edit['tableselect[row1]'] = TRUE;
    $edit['tableselect[row3]'] = TRUE;
    $this->drupalPost('form_test/tableselect/multiple-true', $edit, 'Submit');

    $this->assertText(t('Submitted: row1 = row1'), 'Checked checkbox row1.');
    $this->assertText(t('Submitted: row2 = 0'), 'Unchecked checkbox row2.');
    $this->assertText(t('Submitted: row3 = row3'), 'Checked checkbox row3.');

  }

  /**
   * Test submission of values when #multiple is FALSE.
   */
  function testMultipleFalseSubmit() {
    $edit['tableselect'] = 'row1';
    $this->drupalPost('form_test/tableselect/multiple-false', $edit, 'Submit');
    $this->assertText(t('Submitted: row1'), 'Selected radio button');
  }

  /**
   * Test the #js_select property.
   */
  function testAdvancedSelect() {
    // When #multiple = TRUE a Select all checkbox should be displayed by default.
    $this->drupalGet('form_test/tableselect/advanced-select/multiple-true-default');
    $this->assertFieldByXPath('//th[@class="select-all"]', NULL, 'Display a "Select all" checkbox by default when #multiple is TRUE.');

    // When #js_select is set to FALSE, a "Select all" checkbox should not be displayed.
    $this->drupalGet('form_test/tableselect/advanced-select/multiple-true-no-advanced-select');
    $this->assertNoFieldByXPath('//th[@class="select-all"]', NULL, 'Do not display a "Select all" checkbox when #js_select is FALSE.');

    // A "Select all" checkbox never makes sense when #multiple = FALSE, regardless of the value of #js_select.
    $this->drupalGet('form_test/tableselect/advanced-select/multiple-false-default');
    $this->assertNoFieldByXPath('//th[@class="select-all"]', NULL, 'Do not display a "Select all" checkbox when #multiple is FALSE.');

    $this->drupalGet('form_test/tableselect/advanced-select/multiple-false-advanced-select');
    $this->assertNoFieldByXPath('//th[@class="select-all"]', NULL, 'Do not display a "Select all" checkbox when #multiple is FALSE, even when #js_select is TRUE.');
  }


  /**
   * Test the whether the option checker gives an error on invalid tableselect values for checkboxes.
   */
  function testMultipleTrueOptionchecker() {

    list($header, $options) = _form_test_tableselect_get_data();

    $form['tableselect'] = array(
      '#type' => 'tableselect',
      '#header' => $header,
      '#options' => $options,
    );

    // Test with a valid value.
    list($processed_form, $form_state, $errors) = $this->formSubmitHelper($form, array('tableselect' => array('row1' => 'row1')));
    $this->assertFalse(isset($errors['tableselect']), 'Option checker allows valid values for checkboxes.');

    // Test with an invalid value.
    list($processed_form, $form_state, $errors) = $this->formSubmitHelper($form, array('tableselect' => array('non_existing_value' => 'non_existing_value')));
    $this->assertTrue(isset($errors['tableselect']), 'Option checker disallows invalid values for checkboxes.');

  }


  /**
   * Test the whether the option checker gives an error on invalid tableselect values for radios.
   */
  function testMultipleFalseOptionchecker() {

    list($header, $options) = _form_test_tableselect_get_data();

    $form['tableselect'] = array(
      '#type' => 'tableselect',
      '#header' => $header,
      '#options' => $options,
      '#multiple' => FALSE,
    );

    // Test with a valid value.
    list($processed_form, $form_state, $errors) = $this->formSubmitHelper($form, array('tableselect' => 'row1'));
    $this->assertFalse(isset($errors['tableselect']), 'Option checker allows valid values for radio buttons.');

    // Test with an invalid value.
    list($processed_form, $form_state, $errors) = $this->formSubmitHelper($form, array('tableselect' => 'non_existing_value'));
    $this->assertTrue(isset($errors['tableselect']), 'Option checker disallows invalid values for radio buttons.');
  }


  /**
   * Helper function for the option check test to submit a form while collecting errors.
   *
   * @param $form_element
   *   A form element to test.
   * @param $edit
   *   An array containing post data.
   *
   * @return
   *   An array containing the processed form, the form_state and any errors.
   */
  private function formSubmitHelper($form, $edit) {
    $form_id = $this->randomName();
    $form_state = form_state_defaults();

    $form['op'] = array('#type' => 'submit', '#value' => t('Submit'));

    $form_state['input'] = $edit;
    $form_state['input']['form_id'] = $form_id;

    // 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();

    // Clear errors and messages.
    drupal_get_messages();
    form_clear_error();

    // Return the processed form together with form_state and errors
    // to allow the caller lowlevel access to the form.
    return array($form, $form_state, $errors);
  }

}

/**
 * Test the vertical_tabs form element for expected behavior.
 */
class FormsElementsVerticalTabsFunctionalTest extends DrupalWebTestCase {

  public static function getInfo() {
    return array(
      'name' => 'Vertical tabs form element type test',
      'description' => 'Test the vertical_tabs element for expected behavior',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp('form_test');
  }

  /**
   * Ensures that vertical-tabs.js is included before collapse.js.
   *
   * Otherwise, collapse.js adds "SHOW" or "HIDE" labels to the tabs.
   */
  function testJavaScriptOrdering() {
    $this->drupalGet('form_test/vertical-tabs');
    $position1 = strpos($this->content, 'misc/vertical-tabs.js');
    $position2 = strpos($this->content, 'misc/collapse.js');
    $this->assertTrue($position1 !== FALSE && $position2 !== FALSE && $position1 < $position2, 'vertical-tabs.js is included before collapse.js');
  }
}

/**
 * Test the form storage on a multistep form.
 *
 * The tested form puts data into the storage during the initial form
 * construction. These tests verify that there are no duplicate form
 * constructions, with and without manual form caching activiated. Furthermore
 * when a validation error occurs, it makes sure that changed form element
 * values aren't lost due to a wrong form rebuild.
 */
class FormsFormStorageTestCase extends DrupalWebTestCase {

  public static function getInfo() {
    return array(
      'name'  => 'Multistep form using form storage',
      'description'  => 'Tests a multistep form using form storage and makes sure validation and caching works right.',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp('form_test');

    $this->web_user = $this->drupalCreateUser(array('access content'));
    $this->drupalLogin($this->web_user);
  }

  /**
   * Tests using the form in a usual way.
   */
  function testForm() {
    $this->drupalGet('form_test/form-storage');
    $this->assertText('Form constructions: 1');

    $edit = array('title' => 'new', 'value' => 'value_is_set');

    // Use form rebuilding triggered by a submit button.
    $this->drupalPost(NULL, $edit, 'Continue submit');
    $this->assertText('Form constructions: 2');
    $this->assertText('Form constructions: 3');

    // Reset the form to the values of the storage, using a form rebuild
    // triggered by button of type button.
    $this->drupalPost(NULL, array('title' => 'changed'), 'Reset');
    $this->assertFieldByName('title', 'new', 'Values have been resetted.');
    // After rebuilding, the form has been cached.
    $this->assertText('Form constructions: 4');

    $this->drupalPost(NULL, $edit, 'Save');
    $this->assertText('Form constructions: 4');
    $this->assertText('Title: new', 'The form storage has stored the values.');
  }

  /**
   * Tests using the form with an activated $form_state['cache'] property.
   */
  function testFormCached() {
    $this->drupalGet('form_test/form-storage', array('query' => array('cache' => 1)));
    $this->assertText('Form constructions: 1');

    $edit = array('title' => 'new', 'value' => 'value_is_set');

    // Use form rebuilding triggered by a submit button.
    $this->drupalPost(NULL, $edit, 'Continue submit');
    $this->assertText('Form constructions: 2');

    // Reset the form to the values of the storage, using a form rebuild
    // triggered by button of type button.
    $this->drupalPost(NULL, array('title' => 'changed'), 'Reset');
    $this->assertFieldByName('title', 'new', 'Values have been resetted.');
    $this->assertText('Form constructions: 3');

    $this->drupalPost(NULL, $edit, 'Save');
    $this->assertText('Form constructions: 3');
    $this->assertText('Title: new', 'The form storage has stored the values.');
  }

  /**
   * Tests validation when form storage is used.
   */
  function testValidation() {
    $this->drupalPost('form_test/form-storage', array('title' => '', 'value' => 'value_is_set'), 'Continue submit');
    $this->assertPattern('/value_is_set/', 'The input values have been kept.');
  }

  /**
   * Tests updating cached form storage during form validation.
   *
   * If form caching is enabled and a form stores data in the form storage, then
   * the form storage also has to be updated in case of a validation error in
   * the form. This test re-uses the existing form for multi-step tests, but
   * triggers a special #element_validate handler to update the form storage
   * during form validation, while another, required element in the form
   * triggers a form validation error.
   */
  function testCachedFormStorageValidation() {
    // Request the form with 'cache' query parameter to enable form caching.
    $this->drupalGet('form_test/form-storage', array('query' => array('cache' => 1)));

    // Skip step 1 of the multi-step form, since the first step copies over
    // 'title' into form storage, but we want to verify that changes in the form
    // storage are updated in the cache during form validation.
    $edit = array('title' => 'foo');
    $this->drupalPost(NULL, $edit, 'Continue submit');

    // In step 2, trigger a validation error for the required 'title' field, and
    // post the special 'change_title' value for the 'value' field, which
    // conditionally invokes the #element_validate handler to update the form
    // storage.
    $edit = array('title' => '', 'value' => 'change_title');
    $this->drupalPost(NULL, $edit, 'Save');

    // At this point, the form storage should contain updated values, but we do
    // not see them, because the form has not been rebuilt yet due to the
    // validation error. Post again and verify that the rebuilt form contains
    // the values of the updated form storage.
    $this->drupalPost(NULL, array('title' => 'foo', 'value' => 'bar'), 'Save');
    $this->assertText("The thing has been changed.", 'The altered form storage value was updated in cache and taken over.');
  }

  /**
   * Tests a form using form state without using 'storage' to pass data from the
   * constructor to a submit handler. The data has to persist even when caching
   * gets activated, what may happen when a modules alter the form and adds
   * #ajax properties.
   */
  function testFormStatePersist() {
    // Test the form one time with caching activated and one time without.
    $run_options = array(
      array(),
      array('query' => array('cache' => 1)),
    );
    foreach ($run_options as $options) {
      $this->drupalPost('form-test/state-persist', array(), t('Submit'), $options);
      // The submit handler outputs the value in $form_state, assert it's there.
      $this->assertText('State persisted.');

      // Test it again, but first trigger a validation error, then test.
      $this->drupalPost('form-test/state-persist', array('title' => ''), t('Submit'), $options);
      $this->assertText(t('!name field is required.', array('!name' => 'title')));
      // Submit the form again triggering no validation error.
      $this->drupalPost(NULL, array('title' => 'foo'), t('Submit'), $options);
      $this->assertText('State persisted.');

      // Now post to the rebuilt form and verify it's still there afterwards.
      $this->drupalPost(NULL, array('title' => 'bar'), t('Submit'), $options);
      $this->assertText('State persisted.');
    }
  }

  /**
   * Verify that the form build-id remains the same when validation errors
   * occur on a mutable form.
   */
  function testMutableForm() {
    // Request the form with 'cache' query parameter to enable form caching.
    $this->drupalGet('form_test/form-storage', array('query' => array('cache' => 1)));
    $buildIdFields = $this->xpath('//input[@name="form_build_id"]');
    $this->assertEqual(count($buildIdFields), 1, 'One form build id field on the page');
    $buildId = (string) $buildIdFields[0]['value'];

    // Trigger validation error by submitting an empty title.
    $edit = array('title' => '');
    $this->drupalPost(NULL, $edit, 'Continue submit');

    // Verify that the build-id did not change.
    $this->assertFieldByName('form_build_id', $buildId, 'Build id remains the same when form validation fails');
  }

  /**
   * Verifies that form build-id is regenerated when loading an immutable form
   * from the cache.
   */
  function testImmutableForm() {
    // Request the form with 'cache' query parameter to enable form caching.
    $this->drupalGet('form_test/form-storage', array('query' => array('cache' => 1, 'immutable' => 1)));
    $buildIdFields = $this->xpath('//input[@name="form_build_id"]');
    $this->assertEqual(count($buildIdFields), 1, 'One form build id field on the page');
    $buildId = (string) $buildIdFields[0]['value'];

    // Trigger validation error by submitting an empty title.
    $edit = array('title' => '');
    $this->drupalPost(NULL, $edit, 'Continue submit');

    // Verify that the build-id did change.
    $this->assertNoFieldByName('form_build_id', $buildId, 'Build id changes when form validation fails');

    // Retrieve the new build-id.
    $buildIdFields = $this->xpath('//input[@name="form_build_id"]');
    $this->assertEqual(count($buildIdFields), 1, 'One form build id field on the page');
    $buildId = (string) $buildIdFields[0]['value'];

    // Trigger validation error by again submitting an empty title.
    $edit = array('title' => '');
    $this->drupalPost(NULL, $edit, 'Continue submit');

    // Verify that the build-id does not change the second time.
    $this->assertFieldByName('form_build_id', $buildId, 'Build id remains the same when form validation fails subsequently');
  }

  /**
   * Verify that existing contrib code cannot overwrite immutable form state.
   */
  public function testImmutableFormLegacyProtection() {
    $this->drupalGet('form_test/form-storage', array('query' => array('cache' => 1, 'immutable' => 1)));
    $build_id_fields = $this->xpath('//input[@name="form_build_id"]');
    $this->assertEqual(count($build_id_fields), 1, 'One form build id field on the page');
    $build_id = (string) $build_id_fields[0]['value'];

    // Try to poison the form cache.
    $original = $this->drupalGetAJAX('form_test/form-storage-legacy/' . $build_id);
    $this->assertEqual($original['form']['#build_id_old'], $build_id, 'Original build_id was recorded');
    $this->assertNotEqual($original['form']['#build_id'], $build_id, 'New build_id was generated');

    // Assert that a watchdog message was logged by form_set_cache.
    $status = (bool) db_query_range('SELECT 1 FROM {watchdog} WHERE message = :message', 0, 1, array(':message' => 'Form build-id mismatch detected while attempting to store a form in the cache.'));
    $this->assert($status, 'A watchdog message was logged by form_set_cache');

    // Ensure that the form state was not poisoned by the preceeding call.
    $original = $this->drupalGetAJAX('form_test/form-storage-legacy/' . $build_id);
    $this->assertEqual($original['form']['#build_id_old'], $build_id, 'Original build_id was recorded');
    $this->assertNotEqual($original['form']['#build_id'], $build_id, 'New build_id was generated');
    $this->assert(empty($original['form']['#poisoned']), 'Original form structure was preserved');
    $this->assert(empty($original['form_state']['poisoned']), 'Original form state was preserved');
  }
}

/**
 * Test the form storage when page caching for anonymous users is turned on.
 */
class FormsFormStoragePageCacheTestCase extends DrupalWebTestCase {
  protected $profile = 'testing';

  public static function getInfo() {
    return array(
      'name'  => 'Forms using form storage on cached pages',
      'description'  => 'Tests a form using form storage and makes sure validation and caching works when page caching for anonymous users is turned on.',
      'group' => 'Form API',
    );
  }

  public function setUp() {
    parent::setUp('form_test');

    variable_set('cache', TRUE);
  }

  /**
   * Return the build id of the current form.
   */
  protected function getFormBuildId() {
    $build_id_fields = $this->xpath('//input[@name="form_build_id"]');
    $this->assertEqual(count($build_id_fields), 1, 'One form build id field on the page');
    return (string) $build_id_fields[0]['value'];
  }

  /**
   * Build-id is regenerated when validating cached form.
   */
  public function testValidateFormStorageOnCachedPage() {
    $this->drupalGet('form_test/form-storage-page-cache');
    $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'MISS', 'Page was not cached.');
    $this->assertText('No old build id', 'No old build id on the page');
    $build_id_initial = $this->getFormBuildId();

    // Trigger validation error by submitting an empty title.
    $edit = array('title' => '');
    $this->drupalPost(NULL, $edit, 'Save');
    $this->assertText($build_id_initial, 'Old build id on the page');
    $build_id_first_validation = $this->getFormBuildId();
    $this->assertNotEqual($build_id_initial, $build_id_first_validation, 'Build id changes when form validation fails');

    // Trigger validation error by again submitting an empty title.
    $edit = array('title' => '');
    $this->drupalPost(NULL, $edit, 'Save');
    $this->assertText('No old build id', 'No old build id on the page');
    $build_id_second_validation = $this->getFormBuildId();
    $this->assertEqual($build_id_first_validation, $build_id_second_validation, 'Build id remains the same when form validation fails subsequently');

    // Repeat the test sequence but this time with a page loaded from the cache.
    $this->drupalGet('form_test/form-storage-page-cache');
    $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'HIT', 'Page was cached.');
    $this->assertText('No old build id', 'No old build id on the page');
    $build_id_from_cache_initial = $this->getFormBuildId();
    $this->assertEqual($build_id_initial, $build_id_from_cache_initial, 'Build id is the same as on the first request');

    // Trigger validation error by submitting an empty title.
    $edit = array('title' => '');
    $this->drupalPost(NULL, $edit, 'Save');
    $this->assertText($build_id_initial, 'Old build id is initial build id');
    $build_id_from_cache_first_validation = $this->getFormBuildId();
    $this->assertNotEqual($build_id_initial, $build_id_from_cache_first_validation, 'Build id changes when form validation fails');
    $this->assertNotEqual($build_id_first_validation, $build_id_from_cache_first_validation, 'Build id from first user is not reused');

    // Trigger validation error by again submitting an empty title.
    $edit = array('title' => '');
    $this->drupalPost(NULL, $edit, 'Save');
    $this->assertText('No old build id', 'No old build id on the page');
    $build_id_from_cache_second_validation = $this->getFormBuildId();
    $this->assertEqual($build_id_from_cache_first_validation, $build_id_from_cache_second_validation, 'Build id remains the same when form validation fails subsequently');
  }

  /**
   * Build-id is regenerated when rebuilding cached form.
   */
  public function testRebuildFormStorageOnCachedPage() {
    $this->drupalGet('form_test/form-storage-page-cache');
    $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'MISS', 'Page was not cached.');
    $this->assertText('No old build id', 'No old build id on the page');
    $build_id_initial = $this->getFormBuildId();

    // Trigger rebuild, should regenerate build id.
    $edit = array('title' => 'something');
    $this->drupalPost(NULL, $edit, 'Rebuild');
    $this->assertText($build_id_initial, 'Initial build id as old build id on the page');
    $build_id_first_rebuild = $this->getFormBuildId();
    $this->assertNotEqual($build_id_initial, $build_id_first_rebuild, 'Build id changes on first rebuild.');

    // Trigger subsequent rebuild, should regenerate the build id again.
    $edit = array('title' => 'something');
    $this->drupalPost(NULL, $edit, 'Rebuild');
    $this->assertText($build_id_first_rebuild, 'First build id as old build id on the page');
    $build_id_second_rebuild = $this->getFormBuildId();
    $this->assertNotEqual($build_id_first_rebuild, $build_id_second_rebuild, 'Build id changes on second rebuild.');
  }
}

/**
 * Test wrapper form callbacks.
 */
class FormsFormWrapperTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Form wrapper callback',
      'description' => 'Tests form wrapper callbacks to pass a prebuilt form to form builder functions.',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp('form_test');
  }

  /**
   * Tests using the form in a usual way.
   */
  function testWrapperCallback() {
    $this->drupalGet('form_test/wrapper-callback');
    $this->assertText('Form wrapper callback element output.', 'The form contains form wrapper elements.');
    $this->assertText('Form builder element output.', 'The form contains form builder elements.');
  }
}

/**
 * Test $form_state clearance.
 */
class FormStateValuesCleanTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Form state values clearance',
      'description' => 'Test proper removal of submitted form values using form_state_values_clean().',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp('form_test');
  }

  /**
   * Tests form_state_values_clean().
   */
  function testFormStateValuesClean() {
    $values = drupal_json_decode($this->drupalPost('form_test/form-state-values-clean', array(), t('Submit')));

    // Setup the expected result.
    $result = array(
      'beer' => 1000,
      'baz' => array('beer' => 2000),
    );

    // Verify that all internal Form API elements were removed.
    $this->assertFalse(isset($values['form_id']), format_string('%element was removed.', array('%element' => 'form_id')));
    $this->assertFalse(isset($values['form_token']), format_string('%element was removed.', array('%element' => 'form_token')));
    $this->assertFalse(isset($values['form_build_id']), format_string('%element was removed.', array('%element' => 'form_build_id')));
    $this->assertFalse(isset($values['op']), format_string('%element was removed.', array('%element' => 'op')));

    // Verify that all buttons were removed.
    $this->assertFalse(isset($values['foo']), format_string('%element was removed.', array('%element' => 'foo')));
    $this->assertFalse(isset($values['bar']), format_string('%element was removed.', array('%element' => 'bar')));
    $this->assertFalse(isset($values['baz']['foo']), format_string('%element was removed.', array('%element' => 'foo')));
    $this->assertFalse(isset($values['baz']['baz']), format_string('%element was removed.', array('%element' => 'baz')));

    // Verify that nested form value still exists.
    $this->assertTrue(isset($values['baz']['beer']), 'Nested form value still exists.');

    // Verify that actual form values equal resulting form values.
    $this->assertEqual($values, $result, 'Expected form values equal actual form values.');
  }
}

/**
 * Tests $form_state clearance with form elements having buttons.
 */
class FormStateValuesCleanAdvancedTestCase extends DrupalWebTestCase {
  /**
   * An image file path for uploading.
   */
  protected $image;

  public static function getInfo() {
    return array(
      'name' => 'Form state values clearance (advanced)',
      'description' => 'Test proper removal of submitted form values using form_state_values_clean() when having forms with elements containing buttons like "managed_file".',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp('form_test');
  }

  /**
   * Tests form_state_values_clean().
   */
  function testFormStateValuesCleanAdvanced() {

    // Get an image for uploading.
    $image_files = $this->drupalGetTestFiles('image');
    $this->image = current($image_files);

    // Check if the physical file is there.
    $this->assertTrue(is_file($this->image->uri), "The image file we're going to upload exists.");

    // "Browse" for the desired file.
    $edit = array('files[image]' => drupal_realpath($this->image->uri));

    // Post the form.
    $this->drupalPost('form_test/form-state-values-clean-advanced', $edit, t('Submit'));

    // Expecting a 200 HTTP code.
    $this->assertResponse(200, 'Received a 200 response for posted test file.');
    $this->assertRaw(t('You WIN!'), 'Found the success message.');
  }
}

/**
 * Tests form rebuilding.
 *
 * @todo Add tests for other aspects of form rebuilding.
 */
class FormsRebuildTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Form rebuilding',
      'description' => 'Tests functionality of drupal_rebuild_form().',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp('form_test');

    $this->web_user = $this->drupalCreateUser(array('access content'));
    $this->drupalLogin($this->web_user);
  }

  /**
   * Tests preservation of values.
   */
  function testRebuildPreservesValues() {
    $edit = array(
      'checkbox_1_default_off' => TRUE,
      'checkbox_1_default_on' => FALSE,
      'text_1' => 'foo',
    );
    $this->drupalPost('form-test/form-rebuild-preserve-values', $edit, 'Add more');

    // Verify that initial elements retained their submitted values.
    $this->assertFieldChecked('edit-checkbox-1-default-off', 'A submitted checked checkbox retained its checked state during a rebuild.');
    $this->assertNoFieldChecked('edit-checkbox-1-default-on', 'A submitted unchecked checkbox retained its unchecked state during a rebuild.');
    $this->assertFieldById('edit-text-1', 'foo', 'A textfield retained its submitted value during a rebuild.');

    // Verify that newly added elements were initialized with their default values.
    $this->assertFieldChecked('edit-checkbox-2-default-on', 'A newly added checkbox was initialized with a default checked state.');
    $this->assertNoFieldChecked('edit-checkbox-2-default-off', 'A newly added checkbox was initialized with a default unchecked state.');
    $this->assertFieldById('edit-text-2', 'DEFAULT 2', 'A newly added textfield was initialized with its default value.');
  }

  /**
   * Tests that a form's action is retained after an Ajax submission.
   *
   * The 'action' attribute of a form should not change after an Ajax submission
   * followed by a non-Ajax submission, which triggers a validation error.
   */
  function testPreserveFormActionAfterAJAX() {
    // Create a multi-valued field for 'page' nodes to use for Ajax testing.
    $field_name = 'field_ajax_test';
    $field = array(
      'field_name' => $field_name,
      'type' => 'text',
      'cardinality' => FIELD_CARDINALITY_UNLIMITED,
    );
    field_create_field($field);
    $instance = array(
      'field_name' => $field_name,
      'entity_type' => 'node',
      'bundle' => 'page',
    );
    field_create_instance($instance);

    // Log in a user who can create 'page' nodes.
    $this->web_user = $this->drupalCreateUser(array('create page content'));
    $this->drupalLogin($this->web_user);

    // Get the form for adding a 'page' node. Submit an "add another item" Ajax
    // submission and verify it worked by ensuring the updated page has two text
    // field items in the field for which we just added an item.
    $this->drupalGet('node/add/page');
    $this->drupalPostAJAX(NULL, array(), array('field_ajax_test_add_more' => t('Add another item')), 'system/ajax', array(), array(), 'page-node-form');
    $this->assert(count($this->xpath('//div[contains(@class, "field-name-field-ajax-test")]//input[@type="text"]')) == 2, 'AJAX submission succeeded.');

    // Submit the form with the non-Ajax "Save" button, leaving the title field
    // blank to trigger a validation error, and ensure that a validation error
    // occurred, because this test is for testing what happens when a form is
    // re-rendered without being re-built, which is what happens when there's
    // a validation error.
    $this->drupalPost(NULL, array(), t('Save'));
    $this->assertText('Title field is required.', 'Non-AJAX submission correctly triggered a validation error.');

    // Ensure that the form contains two items in the multi-valued field, so we
    // know we're testing a form that was correctly retrieved from cache.
    $this->assert(count($this->xpath('//form[contains(@id, "page-node-form")]//div[contains(@class, "form-item-field-ajax-test")]//input[@type="text"]')) == 2, 'Form retained its state from cache.');

    // Ensure that the form's action is correct.
    $forms = $this->xpath('//form[contains(@class, "node-page-form")]');
    $this->assert(count($forms) == 1 && $forms[0]['action'] == url('node/add/page'), 'Re-rendered form contains the correct action value.');
  }
}

/**
 * Tests form redirection.
 */
class FormsRedirectTestCase extends DrupalWebTestCase {

  public static function getInfo() {
    return array(
      'name' => 'Form redirecting',
      'description' => 'Tests functionality of drupal_redirect_form().',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp(array('form_test'));
  }

  /**
   * Tests form redirection.
   */
  function testRedirect() {
    $path = 'form-test/redirect';
    $options = array('query' => array('foo' => 'bar'));
    $options['absolute'] = TRUE;

    // Test basic redirection.
    $edit = array(
      'redirection' => TRUE,
      'destination' => $this->randomName(),
    );
    $this->drupalPost($path, $edit, t('Submit'));
    $this->assertUrl($edit['destination'], array(), 'Basic redirection works.');


    // Test without redirection.
    $edit = array(
      'redirection' => FALSE,
    );
    $this->drupalPost($path, $edit, t('Submit'));
    $this->assertUrl($path, array(), 'When redirect is set to FALSE, there should be no redirection.');

    // Test redirection with query parameters.
    $edit = array(
      'redirection' => TRUE,
      'destination' => $this->randomName(),
    );
    $this->drupalPost($path, $edit, t('Submit'), $options);
    $this->assertUrl($edit['destination'], array(), 'Redirection with query parameters works.');

    // Test without redirection but with query parameters.
    $edit = array(
      'redirection' => FALSE,
    );
    $this->drupalPost($path, $edit, t('Submit'), $options);
    $this->assertUrl($path, $options, 'When redirect is set to FALSE, there should be no redirection, and the query parameters should be passed along.');

    // Test redirection back to the original path.
    $edit = array(
      'redirection' => TRUE,
      'destination' => '',
    );
    $this->drupalPost($path, $edit, t('Submit'));
    $this->assertUrl($path, array(), 'When using an empty redirection string, there should be no redirection.');

    // Test redirection back to the original path with query parameters.
    $edit = array(
      'redirection' => TRUE,
      'destination' => '',
    );
    $this->drupalPost($path, $edit, t('Submit'), $options);
    $this->assertUrl($path, $options, 'When using an empty redirection string, there should be no redirection, and the query parameters should be passed along.');
  }

}

/**
 * Test the programmatic form submission behavior.
 */
class FormsProgrammaticTestCase extends DrupalWebTestCase {

  public static function getInfo() {
    return array(
      'name' => 'Programmatic form submissions',
      'description' => 'Test the programmatic form submission behavior.',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp('form_test');
  }

  /**
   * Test the programmatic form submission workflow.
   */
  function testSubmissionWorkflow() {
    // Backup the current batch status and reset it to avoid conflicts while
    // processing the dummy form submit handler.
    $current_batch = $batch =& batch_get();
    $batch = array();

    // Test that a programmatic form submission is rejected when a required
    // textfield is omitted and correctly processed when it is provided.
    $this->submitForm(array(), FALSE);
    $this->submitForm(array('textfield' => 'test 1'), TRUE);
    $this->submitForm(array(), FALSE);
    $this->submitForm(array('textfield' => 'test 2'), TRUE);

    // Test that a programmatic form submission can turn on and off checkboxes
    // which are, by default, checked.
    $this->submitForm(array('textfield' => 'dummy value', 'checkboxes' => array(1 => 1, 2 => 2)), TRUE);
    $this->submitForm(array('textfield' => 'dummy value', 'checkboxes' => array(1 => 1, 2 => NULL)), TRUE);
    $this->submitForm(array('textfield' => 'dummy value', 'checkboxes' => array(1 => NULL, 2 => 2)), TRUE);
    $this->submitForm(array('textfield' => 'dummy value', 'checkboxes' => array(1 => NULL, 2 => NULL)), TRUE);

    // Test that a programmatic form submission can successfully submit values
    // even for fields where the #access property is FALSE.
    $this->submitForm(array('textfield' => 'dummy value', 'textfield_no_access' => 'test value'), TRUE);
    // Test that #access is respected for programmatic form submissions when
    // requested to do so.
    $submitted_values = array('textfield' => 'dummy value', 'textfield_no_access' => 'test value');
    $expected_values = array('textfield' => 'dummy value', 'textfield_no_access' => 'default value');
    $form_state = array('programmed_bypass_access_check' => FALSE);
    $this->submitForm($submitted_values, TRUE, $expected_values, $form_state);

    // Test that a programmatic form submission can correctly click a button
    // that limits validation errors based on user input. Since we do not
    // submit any values for "textfield" here and the textfield is required, we
    // only expect form validation to pass when validation is limited to a
    // different field.
    $this->submitForm(array('op' => 'Submit with limited validation', 'field_to_validate' => 'all'), FALSE);
    $this->submitForm(array('op' => 'Submit with limited validation', 'field_to_validate' => 'textfield'), FALSE);
    $this->submitForm(array('op' => 'Submit with limited validation', 'field_to_validate' => 'field_to_validate'), TRUE);

    // Restore the current batch status.
    $batch = $current_batch;
  }

  /**
   * Helper function used to programmatically submit the form defined in
   * form_test.module with the given values.
   *
   * @param $values
   *   An array of field values to be submitted.
   * @param $valid_input
   *   A boolean indicating whether or not the form submission is expected to
   *   be valid.
   * @param $expected_values
   *   (Optional) An array of field values that are expected to be stored by
   *   the form submit handler. If not set, the submitted $values are assumed
   *   to also be the expected stored values.
   * @param $form_state
   *   (Optional) A keyed array containing the state of the form, to be sent in
   *   the call to drupal_form_submit(). The $values parameter is added to
   *   $form_state['values'] by default, if it is not already set.
   */
  private function submitForm($values, $valid_input, $expected_values = NULL, $form_state = array()) {
    // Programmatically submit the given values.
    $form_state += array('values' => $values);
    drupal_form_submit('form_test_programmatic_form', $form_state);

    // Check that the form returns an error when expected, and vice versa.
    $errors = form_get_errors();
    $valid_form = empty($errors);
    $args = array(
      '%values' => print_r($values, TRUE),
      '%errors' => $valid_form ? t('None') : implode(' ', $errors),
    );
    $this->assertTrue($valid_input == $valid_form, format_string('Input values: %values<br/>Validation handler errors: %errors', $args));

    // We check submitted values only if we have a valid input.
    if ($valid_input) {
      // By fetching the values from $form_state['storage'] we ensure that the
      // submission handler was properly executed.
      $stored_values = $form_state['storage']['programmatic_form_submit'];
      if (!isset($expected_values)) {
        $expected_values = $values;
      }
      foreach ($expected_values as $key => $value) {
        $this->assertTrue(isset($stored_values[$key]) && $stored_values[$key] == $value, format_string('Submission handler correctly executed: %stored_key is %stored_value', array('%stored_key' => $key, '%stored_value' => print_r($value, TRUE))));
      }
    }
  }
}

/**
 * Test that FAPI correctly determines $form_state['triggering_element'].
 */
class FormsTriggeringElementTestCase extends DrupalWebTestCase {

  public static function getInfo() {
    return array(
      'name' => 'Form triggering element determination',
      'description' => 'Test the determination of $form_state[\'triggering_element\'].',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp('form_test');
  }

  /**
   * Test the determination of $form_state['triggering_element'] when no button
   * information is included in the POST data, as is sometimes the case when
   * the ENTER key is pressed in a textfield in Internet Explorer.
   */
  function testNoButtonInfoInPost() {
    $path = 'form-test/clicked-button';
    $edit = array();
    $form_html_id = 'form-test-clicked-button';

    // Ensure submitting a form with no buttons results in no
    // $form_state['triggering_element'] and the form submit handler not
    // running.
    $this->drupalPost($path, $edit, NULL, array(), array(), $form_html_id);
    $this->assertText('There is no clicked button.', '$form_state[\'triggering_element\'] set to NULL.');
    $this->assertNoText('Submit handler for form_test_clicked_button executed.', 'Form submit handler did not execute.');

    // Ensure submitting a form with one or more submit buttons results in
    // $form_state['triggering_element'] being set to the first one the user has
    // access to. An argument with 'r' in it indicates a restricted
    // (#access=FALSE) button.
    $this->drupalPost($path . '/s', $edit, NULL, array(), array(), $form_html_id);
    $this->assertText('The clicked button is button1.', '$form_state[\'triggering_element\'] set to only button.');
    $this->assertText('Submit handler for form_test_clicked_button executed.', 'Form submit handler executed.');

    $this->drupalPost($path . '/s/s', $edit, NULL, array(), array(), $form_html_id);
    $this->assertText('The clicked button is button1.', '$form_state[\'triggering_element\'] set to first button.');
    $this->assertText('Submit handler for form_test_clicked_button executed.', 'Form submit handler executed.');

    $this->drupalPost($path . '/rs/s', $edit, NULL, array(), array(), $form_html_id);
    $this->assertText('The clicked button is button2.', '$form_state[\'triggering_element\'] set to first available button.');
    $this->assertText('Submit handler for form_test_clicked_button executed.', 'Form submit handler executed.');

    // Ensure submitting a form with buttons of different types results in
    // $form_state['triggering_element'] being set to the first button,
    // regardless of type. For the FAPI 'button' type, this should result in the
    // submit handler not executing. The types are 's'(ubmit), 'b'(utton), and
    // 'i'(mage_button).
    $this->drupalPost($path . '/s/b/i', $edit, NULL, array(), array(), $form_html_id);
    $this->assertText('The clicked button is button1.', '$form_state[\'triggering_element\'] set to first button.');
    $this->assertText('Submit handler for form_test_clicked_button executed.', 'Form submit handler executed.');

    $this->drupalPost($path . '/b/s/i', $edit, NULL, array(), array(), $form_html_id);
    $this->assertText('The clicked button is button1.', '$form_state[\'triggering_element\'] set to first button.');
    $this->assertNoText('Submit handler for form_test_clicked_button executed.', 'Form submit handler did not execute.');

    $this->drupalPost($path . '/i/s/b', $edit, NULL, array(), array(), $form_html_id);
    $this->assertText('The clicked button is button1.', '$form_state[\'triggering_element\'] set to first button.');
    $this->assertText('Submit handler for form_test_clicked_button executed.', 'Form submit handler executed.');
  }

  /**
   * Test that $form_state['triggering_element'] does not get set to a button
   * with #access=FALSE.
   */
  function testAttemptAccessControlBypass() {
    $path = 'form-test/clicked-button';
    $form_html_id = 'form-test-clicked-button';

    // Retrieve a form where 'button1' has #access=FALSE and 'button2' doesn't.
    $this->drupalGet($path . '/rs/s');

    // Submit the form with 'button1=button1' in the POST data, which someone
    // trying to get around security safeguards could easily do. We have to do
    // a little trickery here, to work around the safeguards in drupalPost(): by
    // renaming the text field that is in the form to 'button1', we can get the
    // data we want into $_POST.
    $elements = $this->xpath('//form[@id="' . $form_html_id . '"]//input[@name="text"]');
    $elements[0]['name'] = 'button1';
    $this->drupalPost(NULL, array('button1' => 'button1'), NULL, array(), array(), $form_html_id);

    // Ensure that $form_state['triggering_element'] was not set to the
    // restricted button. Do this with both a negative and positive assertion,
    // because negative assertions alone can be brittle. See
    // testNoButtonInfoInPost() for why the triggering element gets set to
    // 'button2'.
    $this->assertNoText('The clicked button is button1.', '$form_state[\'triggering_element\'] not set to a restricted button.');
    $this->assertText('The clicked button is button2.', '$form_state[\'triggering_element\'] not set to a restricted button.');
  }
}

/**
 * Tests rebuilding of arbitrary forms by altering them.
 */
class FormsArbitraryRebuildTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Rebuild arbitrary forms',
      'description' => 'Tests altering forms to be rebuilt so there are multiple steps.',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp('form_test');
    // Auto-create a field for testing.
    $field = array(
      'field_name' => 'test_multiple',
      'type' => 'text',
      'cardinality' => -1,
      'translatable' => FALSE,
    );
    field_create_field($field);

    $instance = array(
      'entity_type' => 'node',
      'field_name' => 'test_multiple',
      'bundle' => 'page',
      'label' => 'Test a multiple valued field',
      'widget' => array(
        'type' => 'text_textfield',
        'weight' => 0,
      ),
    );
    field_create_instance($instance);
    variable_set('user_register', USER_REGISTER_VISITORS);
  }

  /**
   * Tests a basic rebuild with the user registration form.
   */
  function testUserRegistrationRebuild() {
    $edit = array(
      'name' => 'foo',
      'mail' => 'bar@example.com',
    );
    $this->drupalPost('user/register', $edit, 'Rebuild');
    $this->assertText('Form rebuilt.');
    $this->assertFieldByName('name', 'foo', 'Entered user name has been kept.');
    $this->assertFieldByName('mail', 'bar@example.com', 'Entered mail address has been kept.');
  }

  /**
   * Tests a rebuild caused by a multiple value field.
   */
  function testUserRegistrationMultipleField() {
    $edit = array(
      'name' => 'foo',
      'mail' => 'bar@example.com',
    );
    $this->drupalPost('user/register', $edit, t('Add another item'), array('query' => array('field' => TRUE)));
    $this->assertText('Test a multiple valued field', 'Form has been rebuilt.');
    $this->assertFieldByName('name', 'foo', 'Entered user name has been kept.');
    $this->assertFieldByName('mail', 'bar@example.com', 'Entered mail address has been kept.');
  }
}

/**
 * Tests form API file inclusion.
 */
class FormsFileInclusionTestCase extends DrupalWebTestCase {

  public static function getInfo() {
    return array(
      'name' => 'Form API file inclusion',
      'description' => 'Tests form API file inclusion.',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp('form_test');
  }

  /**
   * Tests loading an include specified in hook_menu().
   */
  function testLoadMenuInclude() {
    $this->drupalPostAJAX('form-test/load-include-menu', array(), array('op' => t('Save')), 'system/ajax', array(), array(), 'form-test-load-include-menu');
    $this->assertText('Submit callback called.');
  }

  /**
   * Tests loading a custom specified inlcude.
   */
  function testLoadCustomInclude() {
    $this->drupalPost('form-test/load-include-custom', array(), t('Save'));
    $this->assertText('Submit callback called.');
  }
}

/**
 * Tests checkbox element.
 */
class FormCheckboxTestCase extends DrupalWebTestCase {

  public static function getInfo() {
    return array(
      'name' => 'Form API checkbox',
      'description' => 'Tests form API checkbox handling of various combinations of #default_value and #return_value.',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp('form_test');
  }

  function testFormCheckbox() {
    // Ensure that the checked state is determined and rendered correctly for
    // tricky combinations of default and return values.
    foreach (array(FALSE, NULL, TRUE, 0, '0', '', 1, '1', 'foobar', '1foobar') as $default_value) {
      // Only values that can be used for array indeces are supported for
      // #return_value, with the exception of integer 0, which is not supported.
      // @see form_process_checkbox().
      foreach (array('0', '', 1, '1', 'foobar', '1foobar') as $return_value) {
        $form_array = drupal_get_form('form_test_checkbox_type_juggling', $default_value, $return_value);
        $form = drupal_render($form_array);
        if ($default_value === TRUE) {
          $checked = TRUE;
        }
        elseif ($return_value === '0') {
          $checked = ($default_value === '0');
        }
        elseif ($return_value === '') {
          $checked = ($default_value === '');
        }
        elseif ($return_value === 1 || $return_value === '1') {
          $checked = ($default_value === 1 || $default_value === '1');
        }
        elseif ($return_value === 'foobar') {
          $checked = ($default_value === 'foobar');
        }
        elseif ($return_value === '1foobar') {
          $checked = ($default_value === '1foobar');
        }
        $checked_in_html = strpos($form, 'checked') !== FALSE;
        $message = format_string('#default_value is %default_value #return_value is %return_value.', array('%default_value' => var_export($default_value, TRUE), '%return_value' => var_export($return_value, TRUE)));
        $this->assertIdentical($checked, $checked_in_html, $message);
      }
    }

    // Ensure that $form_state['values'] is populated correctly for a checkboxes
    // group that includes a 0-indexed array of options.
    $results = json_decode($this->drupalPost('form-test/checkboxes-zero', array(), 'Save'));
    $this->assertIdentical($results->checkbox_off, array(0, 0, 0), 'All three in checkbox_off are zeroes: off.');
    $this->assertIdentical($results->checkbox_zero_default, array('0', 0, 0), 'The first choice is on in checkbox_zero_default');
    $this->assertIdentical($results->checkbox_string_zero_default, array('0', 0, 0), 'The first choice is on in checkbox_string_zero_default');
    $edit = array('checkbox_off[0]' => '0');
    $results = json_decode($this->drupalPost('form-test/checkboxes-zero', $edit, 'Save'));
    $this->assertIdentical($results->checkbox_off, array('0', 0, 0), 'The first choice is on in checkbox_off but the rest is not');

    // Ensure that each checkbox is rendered correctly for a checkboxes group
    // that includes a 0-indexed array of options.
    $this->drupalPost('form-test/checkboxes-zero/0', array(), 'Save');
    $checkboxes = $this->xpath('//input[@type="checkbox"]');
    foreach ($checkboxes as $checkbox) {
      $checked = isset($checkbox['checked']);
      $name = (string) $checkbox['name'];
      $this->assertIdentical($checked, $name == 'checkbox_zero_default[0]' || $name == 'checkbox_string_zero_default[0]', format_string('Checkbox %name correctly checked', array('%name' => $name)));
    }
    $edit = array('checkbox_off[0]' => '0');
    $this->drupalPost('form-test/checkboxes-zero/0', $edit, 'Save');
    $checkboxes = $this->xpath('//input[@type="checkbox"]');
    foreach ($checkboxes as $checkbox) {
      $checked = isset($checkbox['checked']);
      $name = (string) $checkbox['name'];
      $this->assertIdentical($checked, $name == 'checkbox_off[0]' || $name == 'checkbox_zero_default[0]' || $name == 'checkbox_string_zero_default[0]', format_string('Checkbox %name correctly checked', array('%name' => $name)));
    }
  }
}

/**
 * Tests uniqueness of generated HTML IDs.
 */
class HTMLIdTestCase extends DrupalWebTestCase {

  public static function getInfo() {
    return array(
      'name' => 'Unique HTML IDs',
      'description' => 'Tests functionality of drupal_html_id().',
      'group' => 'Form API',
    );
  }

  function setUp() {
    parent::setUp('form_test');
  }

  /**
   * Tests that HTML IDs do not get duplicated when form validation fails.
   */
  function testHTMLId() {
    $this->drupalGet('form-test/double-form');
    $this->assertNoDuplicateIds('There are no duplicate IDs');

    // Submit second form with empty title.
    $edit = array();
    $this->drupalPost(NULL, $edit, 'Save', array(), array(), 'form-test-html-id--2');
    $this->assertNoDuplicateIds('There are no duplicate IDs');
  }
}