MimeTypeTest.php

<?php

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


/**
 * Tests filename mimetype detection.
 *
 * @group File
 */
class MimeTypeTest extends FileTestBase {

  /**
   * Modules to enable.
   *
   * @var array
   */
  protected static $modules = [
    'file_test',
  ];

  /**
   * Tests 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' => 'made_up/file_test_1',
      'foo.file_test_2' => 'made_up/file_test_2',
      'foo.doc' => 'made_up/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 = $guesser
          ->guessMimeType($prefix . $input);
        $this
          ->assertSame($expected, $output);
      }

      // Test normal path equivalent
      $output = $guesser
        ->guessMimeType($input);
      $this
        ->assertSame($expected, $output);
    }

    // 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 = $extension_guesser
        ->guessMimeType($input);
      $this
        ->assertSame($expected, $output);
    }
  }

}