MimeTypeTest.php

<?php

namespace Drupal\KernelTests\Core\File;

use Drupal\Component\Render\FormattableMarkup;

/**
 * Tests filename mimetype detection.
 *
 * @group File
 */
class MimeTypeTest extends FileTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    public static $modules = [
        'file_test',
    ];
    
    /**
     * Test mapping of mimetypes from filenames.
     */
    public function testFileMimeTypeDetection() {
        $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',
            'pcf.z' => 'application/octet-stream',
            'jar' => 'application/octet-stream',
            'some.junk' => 'application/octet-stream',
            'foo.file_test_1' => 'madeup/file_test_1',
            'foo.file_test_2' => 'madeup/file_test_2',
            'foo.doc' => 'madeup/doc',
            'test.ogg' => 'audio/ogg',
        ];
        $guesser = $this->container
            ->get('file.mime_type.guesser');
        // Test using default mappings.
        foreach ($test_case as $input => $expected) {
            // Test stream [URI].
            foreach ($prefixes as $prefix) {
                $output = $guesser->guess($prefix . $input);
                $this->assertIdentical($output, $expected, new FormattableMarkup('Mimetype for %input is %output (expected: %expected).', [
                    '%input' => $prefix . $input,
                    '%output' => $output,
                    '%expected' => $expected,
                ]));
            }
            // Test normal path equivalent
            $output = $guesser->guess($input);
            $this->assertIdentical($output, $expected, new FormattableMarkup('Mimetype (using default mappings) for %input is %output (expected: %expected).', [
                '%input' => $input,
                '%output' => $output,
                '%expected' => $expected,
            ]));
        }
        // Now test the extension guesser by passing in a custom mapping.
        $mapping = [
            'mimetypes' => [
                0 => 'application/java-archive',
                1 => 'image/jpeg',
            ],
            'extensions' => [
                'jar' => 0,
                'jpg' => 1,
            ],
        ];
        $test_case = [
            'test.jar' => 'application/java-archive',
            'test.jpeg' => 'application/octet-stream',
            'test.jpg' => 'image/jpeg',
            'test.jar.jpg' => 'image/jpeg',
            'test.jpg.jar' => 'application/java-archive',
            'test.pcf.z' => 'application/octet-stream',
            'pcf.z' => 'application/octet-stream',
            'jar' => 'application/octet-stream',
            'some.junk' => 'application/octet-stream',
            'foo.file_test_1' => 'application/octet-stream',
            'foo.file_test_2' => 'application/octet-stream',
            'foo.doc' => 'application/octet-stream',
            'test.ogg' => 'application/octet-stream',
        ];
        $extension_guesser = $this->container
            ->get('file.mime_type.guesser.extension');
        $extension_guesser->setMapping($mapping);
        foreach ($test_case as $input => $expected) {
            $output = $extension_guesser->guess($input);
            $this->assertIdentical($output, $expected, new FormattableMarkup('Mimetype (using passed-in mappings) for %input is %output (expected: %expected).', [
                '%input' => $input,
                '%output' => $output,
                '%expected' => $expected,
            ]));
        }
    }

}