class DrupalHTMLIdentifierTestCase

class DrupalHTMLIdentifierTestCase extends DrupalUnitTestCase {
  public static function getInfo() {
    return array(
      'name' => 'HTML identifiers',
      'description' => 'Test the functions drupal_html_class(), drupal_html_id() and drupal_clean_css_identifier() for expected behavior',
      'group' => 'System',
    );
  }

  /**
   * Tests that drupal_clean_css_identifier() cleans the identifier properly.
   */
  function testDrupalCleanCSSIdentifier() {

    // Verify that no valid ASCII characters are stripped from the identifier.
    $identifier = 'abcdefghijklmnopqrstuvwxyz_ABCDEFGHIJKLMNOPQRSTUVWXYZ-0123456789';
    $this
      ->assertIdentical(drupal_clean_css_identifier($identifier, array()), $identifier, 'Verify valid ASCII characters pass through.');

    // Verify that valid UTF-8 characters are not stripped from the identifier.
    $identifier = '¡¢£¤¥';
    $this
      ->assertIdentical(drupal_clean_css_identifier($identifier, array()), $identifier, 'Verify valid UTF-8 characters pass through.');

    // Verify that invalid characters (including non-breaking space) are stripped from the identifier.
    $this
      ->assertIdentical(drupal_clean_css_identifier('invalid !"#$%&\'()*+,./:;<=>?@[\\]^`{|}~ identifier', array()), 'invalididentifier', 'Strip invalid characters.');

    // Verify that double underscores are replaced in the identifier by default.
    $identifier = 'css__identifier__with__double__underscores';
    $expected = 'css--identifier--with--double--underscores';
    $this
      ->assertIdentical(drupal_clean_css_identifier($identifier), $expected, 'Verify double underscores are replaced with double hyphens by default.');

    // Verify that double underscores are preserved in the identifier if the
    // variable allow_css_double_underscores is set to TRUE.
    $this
      ->setAllowCSSDoubleUnderscores(TRUE);
    $this
      ->assertIdentical(drupal_clean_css_identifier($identifier), $identifier, 'Verify double underscores are preserved if the allow_css_double_underscores set to TRUE.');

    // To avoid affecting other test cases, set the variable
    // allow_css_double_underscores to FALSE which is the default value.
    $this
      ->setAllowCSSDoubleUnderscores(FALSE);
  }

  /**
   * Set the variable allow_css_double_underscores and reset the cache.
   *
   * @param $value bool
   *   A new value to be set to allow_css_double_underscores.
   */
  function setAllowCSSDoubleUnderscores($value) {
    $GLOBALS['conf']['allow_css_double_underscores'] = $value;
    drupal_static_reset('drupal_clean_css_identifier:allow_css_double_underscores');
  }

  /**
   * Tests that drupal_html_class() cleans the class name properly.
   */
  function testDrupalHTMLClass() {

    // Verify Drupal coding standards are enforced.
    $this
      ->assertIdentical(drupal_html_class('CLASS NAME_[Ü]'), 'class-name--ü', 'Enforce Drupal coding standards.');
  }

  /**
   * Tests that drupal_html_id() cleans the ID properly.
   */
  function testDrupalHTMLId() {

    // Verify that letters, digits, and hyphens are not stripped from the ID.
    $id = 'abcdefghijklmnopqrstuvwxyz-0123456789';
    $this
      ->assertIdentical(drupal_html_id($id), $id, 'Verify valid characters pass through.');

    // Verify that invalid characters are stripped from the ID.
    $this
      ->assertIdentical(drupal_html_id('invalid,./:@\\^`{Üidentifier'), 'invalididentifier', 'Strip invalid characters.');

    // Verify Drupal coding standards are enforced.
    $this
      ->assertIdentical(drupal_html_id('ID NAME_[1]'), 'id-name-1', 'Enforce Drupal coding standards.');

    // Reset the static cache so we can ensure the unique id count is at zero.
    drupal_static_reset('drupal_html_id');

    // Clean up IDs with invalid starting characters.
    $this
      ->assertIdentical(drupal_html_id('test-unique-id'), 'test-unique-id', 'Test the uniqueness of IDs #1.');
    $this
      ->assertIdentical(drupal_html_id('test-unique-id'), 'test-unique-id--2', 'Test the uniqueness of IDs #2.');
    $this
      ->assertIdentical(drupal_html_id('test-unique-id'), 'test-unique-id--3', 'Test the uniqueness of IDs #3.');
  }

}