ExtensionMimeTypeGuesserTest.php

<?php

declare (strict_types=1);
namespace Drupal\KernelTests\Core\File\MimeType;

use Drupal\KernelTests\KernelTestBase;
// cspell:ignore garply tarz

/**
 * Tests filename mimetype detection.
 *
 * Installing the 'file_test' module allows DummyMimeTypeMapLoadedSubscriber
 * to execute and add some mappings. We check here that they are.
 *
 * @group File
 */
class ExtensionMimeTypeGuesserTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'file_test',
    ];
    
    /**
     * Tests mapping of mimetypes from filenames.
     */
    public function testGuessMimeType() : void {
        $prefixes = [
            'public://',
            'private://',
            'temporary://',
            'dummy-remote://',
        ];
        $test_case = [
            'test.jar' => 'application/java-archive',
            'test.jpeg' => 'image/jpeg',
            'test.JPEG' => 'image/jpeg',
            'test.jpg' => 'image/jpeg',
            'test.jar.jpg' => 'image/jpeg',
            'test.jpg.jar' => 'application/java-archive',
            'test.pcf.Z' => 'application/x-font',
            'test.garply.waldo' => 'application/x-garply-waldo',
            'pcf.z' => 'application/x-compress',
            'jar' => NULL,
            'garply.waldo' => NULL,
            'some.junk' => NULL,
            // Mime type added by file_test_mimetype_alter()
'foo.file_test_1' => 'made_up/file_test_1',
            'foo.file_test_2' => 'made_up/file_test_2',
            'foo.doc' => 'made_up/doc',
            'test.ogg' => 'audio/ogg',
            'foobar.z' => 'application/x-compress',
            'foobar.tar' => 'application/x-tar',
            'foobar.tar.z' => 'application/x-tarz',
            'foobar.0.zip' => 'application/zip',
            'foobar..zip' => 'application/zip',
        ];
        
        /** @var \Drupal\Core\File\MimeType\ExtensionMimeTypeGuesser $guesser */
        $guesser = \Drupal::service('file.mime_type.guesser.extension');
        // Test using default mappings.
        foreach ($test_case as $input => $expected) {
            // Test stream [URI].
            foreach ($prefixes as $prefix) {
                $output = $guesser->guessMimeType($prefix . $input);
                $this->assertSame($expected, $output);
            }
            // Test normal path equivalent.
            $output = $guesser->guessMimeType($input);
            $this->assertSame($expected, $output);
        }
    }

}