CssCollectionOptimizerUnitTest.php

<?php

namespace Drupal\Tests\Core\Asset;

use Drupal\Core\Asset\AssetCollectionGrouperInterface;
use Drupal\Core\Asset\AssetDumperInterface;
use Drupal\Core\Asset\AssetOptimizerInterface;
use Drupal\Core\Asset\CssCollectionOptimizer;
use Drupal\Core\File\FileSystemInterface;
use Drupal\Core\State\StateInterface;
use Drupal\Tests\UnitTestCase;

/**
 * Tests the CSS asset optimizer.
 *
 * @group Asset
 */
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);
    }

}