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.');
    }

}