JsOptimizerUnitTest.php

<?php

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();
        $this->optimizer = new JsOptimizer();
    }
    
    /**
     * Provides data for the JS asset cleaning test.
     *
     * @see \Drupal\Core\Asset\JsOptimizer::clean()
     *
     * @returns array
     *   An array of test data.
     */
    public 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) {
        $this->assertEquals($expected, $this->optimizer
            ->clean($js_asset));
    }
    
    /**
     * Provides data for the JS asset optimize test.
     *
     * @see \Drupal\Core\Asset\JsOptimizer::optimize()
     *
     * @returns array
     *   An array of test data.
     */
    public 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'),
            ],
        ];
    }
    
    /**
     * Tests cleaning of a JS asset group containing 'type' => 'file'.
     *
     * @dataProvider providerTestOptimize
     */
    public function testOptimize($js_asset, $expected) {
        $this->assertEquals($expected, $this->optimizer
            ->optimize($js_asset));
    }

}