JsOptimizerUnitTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\Core\Asset;

use Drupal\Core\Asset\JsOptimizer;
use Drupal\Tests\UnitTestCase;

/**
 * Tests the JS asset optimizer.
 *
 * @group Asset
 */
class JsOptimizerUnitTest extends UnitTestCase {
  
  /**
   * A JS asset optimizer.
   *
   * @var \Drupal\Core\Asset\JsOptimizer
   */
  protected $optimizer;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $logger = $this->createMock('\\Psr\\Log\\LoggerInterface');
    $this->optimizer = new JsOptimizer($logger);
  }
  
  /**
   * Provides data for the JS asset cleaning test.
   *
   * @see \Drupal\Core\Asset\JsOptimizer::clean()
   *
   * @return array
   *   An array of test data.
   */
  public static function providerTestClean() {
    $path = dirname(__FILE__) . '/js_test_files/';
    return [
      // File. Tests:
      // - Stripped sourceMappingURL with comment # syntax.
0 => [
        file_get_contents($path . 'source_mapping_url.min.js'),
        file_get_contents($path . 'source_mapping_url.min.js.optimized.js'),
      ],
      // File. Tests:
      // - Stripped sourceMappingURL with comment @ syntax.
1 => [
        file_get_contents($path . 'source_mapping_url_old.min.js'),
        file_get_contents($path . 'source_mapping_url_old.min.js.optimized.js'),
      ],
      // File. Tests:
      // - Stripped sourceURL with comment # syntax.
2 => [
        file_get_contents($path . 'source_url.min.js'),
        file_get_contents($path . 'source_url.min.js.optimized.js'),
      ],
      // File. Tests:
      // - Stripped sourceURL with comment @ syntax.
3 => [
        file_get_contents($path . 'source_url_old.min.js'),
        file_get_contents($path . 'source_url_old.min.js.optimized.js'),
      ],
    ];
  }
  
  /**
   * Tests cleaning of a JS asset group containing 'type' => 'file'.
   *
   * @dataProvider providerTestClean
   */
  public function testClean($js_asset, $expected) : void {
    $this->assertEquals($expected, $this->optimizer
      ->clean($js_asset));
  }
  
  /**
   * Provides data for the JS asset optimize test.
   *
   * @see \Drupal\Core\Asset\JsOptimizer::optimize()
   *
   * @return array
   *   An array of test data.
   */
  public static function providerTestOptimize() {
    $path = dirname(__FILE__) . '/js_test_files/';
    return [
      0 => [
        [
          'type' => 'file',
          'preprocess' => TRUE,
          'data' => $path . 'utf8_bom.js',
        ],
        file_get_contents($path . 'utf8_bom.js.optimized.js'),
      ],
      1 => [
        [
          'type' => 'file',
          'preprocess' => TRUE,
          'data' => $path . 'utf16_bom.js',
        ],
        file_get_contents($path . 'utf16_bom.js.optimized.js'),
      ],
      2 => [
        [
          'type' => 'file',
          'preprocess' => TRUE,
          'data' => $path . 'latin_9.js',
          'attributes' => [
            'charset' => 'ISO-8859-15',
          ],
        ],
        file_get_contents($path . 'latin_9.js.optimized.js'),
      ],
      3 => [
        [
          'type' => 'file',
          'preprocess' => TRUE,
          'data' => $path . 'to_be_minified.js',
        ],
        file_get_contents($path . 'to_be_minified.js.optimized.js'),
      ],
      4 => [
        [
          'type' => 'file',
          'preprocess' => TRUE,
          'data' => $path . 'syntax_error.js',
        ],
        // When there is a syntax error, the 'optimized' contents are the
        // contents of the original file.
file_get_contents($path . 'syntax_error.js'),
      ],
    ];
  }
  
  /**
   * Tests cleaning of a JS asset group containing 'type' => 'file'.
   *
   * @dataProvider providerTestOptimize
   */
  public function testOptimize($js_asset, $expected) : void {
    $this->assertEquals($expected, $this->optimizer
      ->optimize($js_asset));
  }

}