class CascadingStylesheetsUnitTest

class CascadingStylesheetsUnitTest extends DrupalUnitTestCase {
    public static function getInfo() {
        return array(
            'name' => 'CSS Unit Tests',
            'description' => 'Unit tests on CSS functions like aggregation.',
            'group' => 'System',
        );
    }
    
    /**
     * Tests basic CSS loading with and without optimization via drupal_load_stylesheet().
     *
     * Known tests:
     * - Retain white-space in selectors. (https://drupal.org/node/472820)
     * - Proper URLs in imported files. (https://drupal.org/node/265719)
     * - Retain pseudo-selectors. (https://drupal.org/node/460448)
     * - Don't adjust data URIs. (https://drupal.org/node/2142441)
     * - Files imported from external URLs. (https://drupal.org/node/2014851)
     */
    function testLoadCssBasic() {
        // Array of files to test living in 'simpletest/files/css_test_files/'.
        // - Original: name.css
        // - Unoptimized expected content: name.css.unoptimized.css
        // - Optimized expected content: name.css.optimized.css
        $testfiles = array(
            'css_input_without_import.css',
            'css_input_with_import.css',
            'css_subfolder/css_input_with_import.css',
            'comment_hacks.css',
            'quotes.css',
        );
        $path = drupal_get_path('module', 'simpletest') . '/files/css_test_files';
        foreach ($testfiles as $file) {
            $file_path = $path . '/' . $file;
            $file_url = $GLOBALS['base_url'] . '/' . $file_path;
            $expected = file_get_contents($file_path . '.unoptimized.css');
            $unoptimized_output = drupal_load_stylesheet($file_path, FALSE);
            $this->assertEqual($unoptimized_output, $expected, format_string('Unoptimized CSS file has expected contents (@file)', array(
                '@file' => $file,
            )));
            $expected = file_get_contents($file_path . '.optimized.css');
            $optimized_output = drupal_load_stylesheet($file_path, TRUE);
            $this->assertEqual($optimized_output, $expected, format_string('Optimized CSS file has expected contents (@file)', array(
                '@file' => $file,
            )));
            // Repeat the tests by accessing the stylesheets by URL.
            $expected = file_get_contents($file_path . '.unoptimized.css');
            $unoptimized_output_url = drupal_load_stylesheet($file_url, FALSE);
            $this->assertEqual($unoptimized_output_url, $expected, format_string('Unoptimized CSS file (loaded from an URL) has expected contents (@file)', array(
                '@file' => $file,
            )));
            $expected = file_get_contents($file_path . '.optimized.css');
            $optimized_output_url = drupal_load_stylesheet($file_url, TRUE);
            $this->assertEqual($optimized_output_url, $expected, format_string('Optimized CSS file (loaded from an URL) has expected contents (@file)', array(
                '@file' => $file,
            )));
        }
    }

}