class CssMinifierUnitTest

class CssMinifierUnitTest extends KernelTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'advagg_css_minify',
    ];
    
    /**
     * The Minifier.
     *
     * @var \Drupal\advagg_css_minify\Asset\CssMinifier
     */
    protected $optimizer;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() {
        parent::setUp();
        $this->installConfig('advagg_css_minify');
        $this->optimizer = \Drupal::service('advagg.css_minifier');
    }
    
    /**
     * Tests running the minifier with the minifier disabled.
     */
    public function testNoMinifier() {
        $this->config('advagg_css_minify.settings')
            ->set('minifier', 0)
            ->save();
        $file = dirname(__FILE__) . '/css_test_files/css_input_without_import.css';
        $contents = file_get_contents($file);
        $this->assertSame($contents, $this->optimizer
            ->optimize($contents, [], []));
    }
    
    /**
     * Provides data for the CSS asset optimizing test.
     */
    public function providerTestMinifyYui() {
        $path = 'core/tests/Drupal/Tests/Core/Asset/css_test_files/';
        $absolute_path = dirname(__FILE__) . '/css_test_files/';
        return [
            // File. Tests:
            // - Stripped comments and white-space.
            // - Retain white-space in selectors. (https://www.drupal.org/node/472820)
            // - Retain pseudo-selectors. (https://www.drupal.org/node/460448)
[
                [
                    'data' => $path . 'css_input_without_import.css',
                ],
                file_get_contents($absolute_path . 'css_input_without_import.css'),
                file_get_contents($absolute_path . 'css_input_without_import.css.optimized.css'),
            ],
            // File. Tests:
            // - Retain comment hacks.
[
                [
                    'data' => $path . 'comment_hacks.css',
                ],
                file_get_contents($absolute_path . 'comment_hacks.css'),
                file_get_contents($absolute_path . 'comment_hacks.css.optimized.css'),
            ],
            // File. Tests:
            // - Any @charset declaration at the beginning of a file should be
            //   removed without breaking subsequent CSS.
[
                [
                    'data' => $path . 'charset_sameline.css',
                ],
                file_get_contents($absolute_path . 'charset_sameline.css'),
                file_get_contents($absolute_path . 'charset.css.optimized.css'),
            ],
            [
                [
                    'data' => $path . 'charset_newline.css',
                ],
                file_get_contents($absolute_path . 'charset_newline.css'),
                file_get_contents($absolute_path . 'charset.css.optimized.css'),
            ],
            [
                [
                    'data' => $path . 'css_input_with_bom.css',
                ],
                file_get_contents($absolute_path . 'css_input_with_bom.css'),
                '.byte-order-mark-test{content:"☃"}',
            ],
            [
                [
                    'data' => $path . 'css_input_with_charset.css',
                ],
                file_get_contents($absolute_path . 'css_input_with_charset.css'),
                '.charset-test{content:"€"}',
            ],
            [
                [
                    'data' => $path . 'css_input_with_bom_and_charset.css',
                ],
                file_get_contents($absolute_path . 'css_input_with_bom_and_charset.css'),
                '.byte-order-mark-charset-test{content:"☃"}',
            ],
            [
                [
                    'data' => $path . 'css_input_with_utf16_bom.css',
                ],
                file_get_contents($absolute_path . 'css_input_with_utf16_bom.css'),
                '.utf16-byte-order-mark-test{content:"☃"}',
            ],
            [
                [
                    'data' => $path . 'quotes.css',
                ],
                file_get_contents($absolute_path . 'quotes.css'),
                file_get_contents($absolute_path . 'quotes.css.optimized.css'),
            ],
        ];
    }
    
    /**
     * Tests minification of a CSS Asset with YUI.
     *
     * @param array $css_asset
     *   A fake asset array with the filepath to pass to the minifier.
     * @param string $original
     *   The asset string contents to be minified.
     * @param string $expected
     *   The expected result of minification.
     *
     * @dataProvider providerTestMinifyYui
     */
    public function testMinifyYui(array $css_asset, $original, $expected) {
        $this->assertEquals($expected, $this->optimizer
            ->optimize($original, $css_asset, []));
    }

}