class CssCollectionOptimizerUnitTest

class CssCollectionOptimizerUnitTest extends UnitTestCase {
  
  /**
   * The data from the dumper.
   *
   * @var string
   */
  protected $dumperData;
  
  /**
   * A CSS Collection optimizer.
   *
   * @var \Drupal\Core\Asset\AssetCollectionOptimizerInterface
   */
  protected $optimizer;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $mock_grouper = $this->createMock(AssetCollectionGrouperInterface::class);
    $mock_grouper->method('group')
      ->willReturnCallback(function ($assets) {
      return [
        [
          'items' => $assets,
          'type' => 'file',
          'preprocess' => TRUE,
        ],
      ];
    });
    $mock_optimizer = $this->createMock(AssetOptimizerInterface::class);
    $mock_optimizer->method('optimize')
      ->willReturn(file_get_contents(__DIR__ . '/css_test_files/css_input_with_import.css.optimized.css'), file_get_contents(__DIR__ . '/css_test_files/css_subfolder/css_input_with_import.css.optimized.css'));
    $mock_dumper = $this->createMock(AssetDumperInterface::class);
    $mock_dumper->method('dump')
      ->willReturnCallback(function ($css) {
      $this->dumperData = $css;
    });
    $mock_state = $this->createMock(StateInterface::class);
    $mock_file_system = $this->createMock(FileSystemInterface::class);
    $this->optimizer = new CssCollectionOptimizer($mock_grouper, $mock_optimizer, $mock_dumper, $mock_state, $mock_file_system);
  }
  
  /**
   * Test that css imports with strange letters do not destroy the css output.
   */
  public function testCssImport() {
    $this->optimizer
      ->optimize([
      'core/modules/system/tests/modules/common_test/common_test_css_import.css' => [
        'type' => 'file',
        'data' => 'core/modules/system/tests/modules/common_test/common_test_css_import.css',
        'preprocess' => TRUE,
      ],
      'core/modules/system/tests/modules/common_test/common_test_css_import_not_preprocessed.css' => [
        'type' => 'file',
        'data' => 'core/modules/system/tests/modules/common_test/common_test_css_import.css',
        'preprocess' => TRUE,
      ],
    ]);
    self::assertEquals(file_get_contents(__DIR__ . '/css_test_files/css_input_with_import.css.optimized.aggregated.css'), $this->dumperData);
  }

}