<?php
// $Id$

/**
 * @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');
    $elements['password_confirm']['empty_values'] = $empty_strings;

    $elements['textarea']['element'] = array('#title' => $this->randomName(), '#type' => 'textarea');
    $elements['textarea']['empty_values'] = $empty_strings;

    $elements['radios']['element'] = array('#title' => $this->randomName(), '#type' => 'radios', '#options' => array($this->randomName(), $this->randomName(), $this->randomName()));
    $elements['radios']['empty_values'] = $empty_arrays;

    $elements['checkbox']['element'] = array('#title' => $this->randomName(), '#type' => 'checkbox', '#required' => TRUE, '#title' => $this->randomName());
    $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' => $this->randomName(), '#type' => 'select', '#options' => array($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;
          $form_state['values'][$element] = $empty;
          $form_state['input'] = $form_state['values'];
          $form_state['input']['form_id'] = $form_id;
          $form_state['method'] = 'post';
          drupal_prepare_form($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();
  }

  /**
   * 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')), t('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], $expected_value, t('Checkbox %widget returns expected value (expected: %expected, got: %value)', array(
        '%widget' => var_export($widget, TRUE),
        '%expected' => var_export($expected_value, TRUE),
        '%value' => var_export($values[$widget], TRUE),
      )));
    }
  }

  /**
   * 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.
    $this->drupalGet('form-test/disabled-elements');
    foreach ($this->xpath('//*[@disabled]') as $element) {
      unset($element['disabled']);
    }
    $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 => $values) {
      foreach (element_children($form) as $key) {
        if (isset($form[$key]['#default_value'])) {
          $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], t('Default value for %type: expected %expected, returned %returned.', array('%type' => $key, '%expected' => var_export($expected_value, TRUE), '%returned' => var_export($values[$key], TRUE))));
        }
      }
    }
  }
}

/**
 * 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', t('Form element #value was altered.'));
    $this->assertText('Name value: value changed by form_set_value() in #element_validate', t('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', t('Form element #value was altered.'));
    $this->assertText('Name value: value changed by form_set_value() in #validate', t('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', t('Form element was hidden.'));
    $this->assertText('Name value: element_validate_access', t('Value for inaccessible form element exists.'));

    // Verify that value for inaccessible form element persists.
    $this->drupalPost(NULL, array(), 'Save');
    $this->assertNoFieldByName('name', t('Form element was hidden.'));
    $this->assertText('Name value: element_validate_access', t('Value for inaccessible form element exists.'));
  }

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

    // Submit the form by pressing the button with #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');

    // 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');
  }
}

/**
 * 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]), t("Label follows field and label option class correct for regular checkboxes."));

    $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]), t("Label follows field and label option class correct for regular radios."));

    // Exercise various defaults for checkboxes and modifications to ensure
    // appropriate override and correct behaviour.
    $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]), t("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 behaviour.
    $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]), t("Label preceeds 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]), t("Label tag with required marker preceeds required textfield with no title."));

    $elements = $this->xpath('//input[@id="edit-form-textfield-test-title"]/preceding-sibling::span[@class="form-required"]');
    $this->assertFalse(isset($elements[0]), t("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]), t("Label after field and label option class correct for text field."));

    $elements = $this->xpath('//input[@id="edit-form-textfield-test-title-invisible"]/following-sibling::label[@for="edit-form-textfield-test-title-invisible" and @class="element-invisible"]');
    $this->assertTrue(isset($elements[0]), t("Label after field and label class is element-invisible."));

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

/**
 * 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.'), t('Empty text should not be displayed.'));

    // Test for the presence of the Select all rows tableheader.
    $this->assertFieldByXPath('//th[@class="select-all"]', NULL, t('Presence of the "Select all" checkbox.'));

    $rows = array('row1', 'row2', 'row3');
    foreach ($rows as $row) {
      $this->assertFieldByXPath('//input[@type="checkbox"]', $row, t('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.'), t('Empty text should not be displayed.'));

    // Test for the absence of the Select all rows tableheader.
    $this->assertNoFieldByXPath('//th[@class="select-all"]', '', t('Absence of the "Select all" checkbox.'));

    $rows = array('row1', 'row2', 'row3');
    foreach ($rows as $row) {
      $this->assertFieldByXPath('//input[@type="radio"]', $row, t('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.'), t('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'), t('Checked checkbox row1'));
    $this->assertText(t('Submitted: row2 = 0'), t('Unchecked checkbox row2.'));
    $this->assertText(t('Submitted: row3 = 0'), t('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'), t('Checked checkbox row1.'));
    $this->assertText(t('Submitted: row2 = 0'), t('Unchecked checkbox row2.'));
    $this->assertText(t('Submitted: row3 = row3'), t('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'), t('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, t('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, t('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, t('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, t('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' => 'row1'));
    $this->assertFalse(isset($errors['tableselect']), t('Option checker allows valid values for checkboxes.'));

    // Test with an invalid value.
    list($processed_form, $form_state, $errors) = $this->formSubmitHelper($form, array('tableselect' => 'non_existing_value'));
    $this->assertTrue(isset($errors['tableselect']), t('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']), t('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']), t('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;

    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 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');
    // Reload the form, but don't rebuild.
    $this->drupalPost(NULL, $edit, 'Reload');
    $this->assertText('Form constructions: 2');

    // Now use form rebuilding triggered by a submit button.
    $this->drupalPost(NULL, $edit, 'Continue submit');
    $this->assertText('Form constructions: 3');
    $this->assertText('Form constructions: 4');

    // 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: 5');

    $this->drupalPost(NULL, $edit, 'Save');
    $this->assertText('Form constructions: 5');
    $this->assertText('Title: new', t('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');
    // Reload the form, but don't rebuild.
    $this->drupalPost(NULL, $edit, 'Reload');
    $this->assertNoText('Form constructions');

    // Now 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', t('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/', t('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.');
    }
  }
}

/**
 * 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.', t('The form contains form wrapper elements.'));
    $this->assertText('Form builder element output.', t('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']), t('%element was removed.', array('%element' => 'form_id')));
    $this->assertFalse(isset($values['form_token']), t('%element was removed.', array('%element' => 'form_token')));
    $this->assertFalse(isset($values['form_build_id']), t('%element was removed.', array('%element' => 'form_build_id')));
    $this->assertFalse(isset($values['op']), t('%element was removed.', array('%element' => 'op')));

    // Verify that all buttons were removed.
    $this->assertFalse(isset($values['foo']), t('%element was removed.', array('%element' => 'foo')));
    $this->assertFalse(isset($values['bar']), t('%element was removed.', array('%element' => 'bar')));
    $this->assertFalse(isset($values['baz']['foo']), t('%element was removed.', array('%element' => 'foo')));
    $this->assertFalse(isset($values['baz']['baz']), t('%element was removed.', array('%element' => 'baz')));

    // Verify that nested form value still exists.
    $this->assertTrue(isset($values['baz']['beer']), t('Nested form value still exists.'));

    // Verify that actual form values equal resulting form values.
    $this->assertEqual($values, $result, t('Expected form values equal actual form values.'));
  }
}

/**
 * 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', t('A submitted checked checkbox retained its checked state during a rebuild.'));
    $this->assertNoFieldChecked('edit-checkbox-1-default-on', t('A submitted unchecked checkbox retained its unchecked state during a rebuild.'));
    $this->assertFieldById('edit-text-1', 'foo', t('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', t('A newly added checkbox was initialized with a default checked state.'));
    $this->assertNoFieldChecked('edit-checkbox-2-default-off', t('A newly added checkbox was initialized with a default unchecked state.'));
    $this->assertFieldById('edit-text-2', 'DEFAULT 2', t('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');
    preg_match('/jQuery\.extend\(Drupal\.settings, (.*?)\);/', $this->content, $matches);
    $settings = drupal_json_decode($matches[1]);
    $button = $this->xpath('//input[@name="field_ajax_test_add_more"]');
    $button_id = (string) $button[0]['id'];
    $this->drupalPostAJAX(NULL, array(), array('field_ajax_test_add_more' => t('Add another item')), 'system/ajax', array(), array(), 'page-node-form', $settings['ajax'][$button_id]);
    $this->assert(count($this->xpath('//div[contains(@class, "field-name-field-ajax-test")]//input[@type="text"]')) == 2, t('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.', t('Non-AJAX submission correctly triggered a validation error.'));

    // 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'), t('Re-rendered form contains the correct action value.'));
  }
}

/**
 * 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();

    $this->submitForm();
    $this->submitForm('test 1');
    $this->submitForm();
    $this->submitForm('test 2');

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

  /**
   * Helper function used to programmatically submit the form defined in
   * form_test.module with the given value.
   *
   * @param string $value
   *   The field value to be submitted.
   */
  private function submitForm($value = NULL) {
    // Programmatically submit the given value.
    $form_state = array('values' => array('submitted_field' => $value));
    drupal_form_submit('form_test_programmatic_form', $form_state);

    $errors = form_get_errors();
    $valid_form = empty($errors);
    $valid_input = !empty($value);

    // If no value was passed the form should return an error and viceversa.
    $args = array('%value' => $value, '%errors' => $valid_form ? '' : implode(' ', $errors));
    $this->assertTrue($valid_input == $valid_form, t('Input value: %value<br/>Validation handler errors: %errors', $args));

    // We check submitted values only if we have a valid input.
    if ($valid_input) {
      // By fetching the value from $form_state['storage'] we ensure that the
      // submission handler was properly executed.
      $submitted_value = $form_state['storage']['programmatic_form_submit'];
      $this->assertTrue($submitted_value == $value, t('Submission handler correctly executed: %submitted_value', array('%submitted_value' => $submitted_value)));
    }
  }
}

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

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

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

  /**
   * Test the determination of $form_state['clicked_button'] 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_id = 'form-test-clicked-button';

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

    // Ensure submitting a form with one or more submit buttons results in
    // $form_state['clicked_button'] being set to the first one the user has
    // access to. An argument with 'r' in it indicates a restricted
    // (#access=FALSE) button.
    drupal_static_reset('drupal_html_id');
    $this->drupalPost($path . '/s', $edit, NULL, array(), array(), $form_id);
    $this->assertText('The clicked button is button1.', t('$form_state[\'clicked_button\'] set to only button.'));
    $this->assertText('Submit handler for form_test_clicked_button executed.', t('Form submit handler executed.'));
    drupal_static_reset('drupal_html_id');
    $this->drupalPost($path . '/s/s', $edit, NULL, array(), array(), $form_id);
    $this->assertText('The clicked button is button1.', t('$form_state[\'clicked_button\'] set to first button.'));
    $this->assertText('Submit handler for form_test_clicked_button executed.', t('Form submit handler executed.'));
    drupal_static_reset('drupal_html_id');
    $this->drupalPost($path . '/rs/s', $edit, NULL, array(), array(), $form_id);
    $this->assertText('The clicked button is button2.', t('$form_state[\'clicked_button\'] set to first available button.'));
    $this->assertText('Submit handler for form_test_clicked_button executed.', t('Form submit handler executed.'));

    // Ensure submitting a form with buttons of different types results in
    // $form_state['clicked_button'] 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).
    drupal_static_reset('drupal_html_id');
    $this->drupalPost($path . '/s/b/i', $edit, NULL, array(), array(), $form_id);
    $this->assertText('The clicked button is button1.', t('$form_state[\'clicked_button\'] set to first button.'));
    $this->assertText('Submit handler for form_test_clicked_button executed.', t('Form submit handler executed.'));
    drupal_static_reset('drupal_html_id');
    $this->drupalPost($path . '/b/s/i', $edit, NULL, array(), array(), $form_id);
    $this->assertText('The clicked button is button1.', t('$form_state[\'clicked_button\'] set to first button.'));
    $this->assertNoText('Submit handler for form_test_clicked_button executed.', t('Form submit handler did not execute.'));
    drupal_static_reset('drupal_html_id');
    $this->drupalPost($path . '/i/s/b', $edit, NULL, array(), array(), $form_id);
    $this->assertText('The clicked button is button1.', t('$form_state[\'clicked_button\'] set to first button.'));
    $this->assertText('Submit handler for form_test_clicked_button executed.', t('Form submit handler executed.'));
  }
}


/**
 * 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);
  }

  /**
   * 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.');
  }
}