class FileUploadResourceTestBase

abstract class FileUploadResourceTestBase extends ResourceTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'rest_test',
        'entity_test',
        'file',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected static $resourceConfigId = 'file.upload';
    
    /**
     * The POST URI.
     *
     * @var string
     */
    protected static $postUri = 'file/upload/entity_test/entity_test/field_rest_file_test';
    
    /**
     * Test file data.
     *
     * @var string
     */
    protected $testFileData = 'Hares sit on chairs, and mules sit on stools.';
    
    /**
     * The test field storage config.
     *
     * @var \Drupal\field\Entity\FieldStorageConfig
     */
    protected $fieldStorage;
    
    /**
     * The field config.
     *
     * @var \Drupal\field\Entity\FieldConfig
     */
    protected $field;
    
    /**
     * The parent entity.
     *
     * @var \Drupal\Core\Entity\EntityInterface
     */
    protected $entity;
    
    /**
     * Created file entity.
     *
     * @var \Drupal\file\Entity\File
     */
    protected $file;
    
    /**
     * An authenticated user.
     *
     * @var \Drupal\user\UserInterface
     */
    protected $user;
    
    /**
     * The entity storage for the 'file' entity type.
     *
     * @var \Drupal\Core\Entity\EntityStorageInterface
     */
    protected $fileStorage;
    
    /**
     * {@inheritdoc}
     */
    public function setUp() {
        parent::setUp();
        $this->fileStorage = $this->container
            ->get('entity_type.manager')
            ->getStorage('file');
        // Add a file field.
        $this->fieldStorage = FieldStorageConfig::create([
            'entity_type' => 'entity_test',
            'field_name' => 'field_rest_file_test',
            'type' => 'file',
            'settings' => [
                'uri_scheme' => 'public',
            ],
        ])->setCardinality(FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
        $this->fieldStorage
            ->save();
        $this->field = FieldConfig::create([
            'entity_type' => 'entity_test',
            'field_name' => 'field_rest_file_test',
            'bundle' => 'entity_test',
            'settings' => [
                'file_directory' => 'foobar',
                'file_extensions' => 'txt',
                'max_filesize' => '',
            ],
        ])->setLabel('Test file field')
            ->setTranslatable(FALSE);
        $this->field
            ->save();
        // Create an entity that a file can be attached to.
        $this->entity = EntityTest::create([
            'name' => 'Llama',
            'type' => 'entity_test',
        ]);
        $this->entity
            ->setOwnerId(isset($this->account) ? $this->account
            ->id() : 0);
        $this->entity
            ->save();
        // Provision entity_test resource.
        $this->resourceConfigStorage
            ->create([
            'id' => 'entity.entity_test',
            'granularity' => RestResourceConfigInterface::RESOURCE_GRANULARITY,
            'configuration' => [
                'methods' => [
                    'POST',
                ],
                'formats' => [
                    static::$format,
                ],
                'authentication' => [
                    static::$auth,
                ],
            ],
            'status' => TRUE,
        ])
            ->save();
        // Provisioning the file upload REST resource without the File REST resource
        // does not make sense.
        $this->resourceConfigStorage
            ->create([
            'id' => 'entity.file',
            'granularity' => RestResourceConfigInterface::RESOURCE_GRANULARITY,
            'configuration' => [
                'methods' => [
                    'GET',
                ],
                'formats' => [
                    static::$format,
                ],
                'authentication' => isset(static::$auth) ? [
                    static::$auth,
                ] : [],
            ],
            'status' => TRUE,
        ])
            ->save();
        $this->refreshTestStateAfterRestConfigChange();
    }
    
    /**
     * Tests using the file upload POST route.
     */
    public function testPostFileUpload() {
        $this->initAuthentication();
        $this->provisionResource([
            static::$format,
        ], static::$auth ? [
            static::$auth,
        ] : [], [
            'POST',
        ]);
        $uri = Url::fromUri('base:' . static::$postUri);
        // DX: 403 when unauthorized.
        $response = $this->fileRequest($uri, $this->testFileData);
        $this->assertResourceErrorResponse(403, $this->getExpectedUnauthorizedAccessMessage('POST'), $response);
        $this->setUpAuthorization('POST');
        // 404 when the field name is invalid.
        $invalid_uri = Url::fromUri('base:file/upload/entity_test/entity_test/field_rest_file_test_invalid');
        $response = $this->fileRequest($invalid_uri, $this->testFileData);
        $this->assertResourceErrorResponse(404, 'Field "field_rest_file_test_invalid" does not exist', $response);
        // This request will have the default 'application/octet-stream' content
        // type header.
        $response = $this->fileRequest($uri, $this->testFileData);
        $this->assertSame(201, $response->getStatusCode());
        $expected = $this->getExpectedNormalizedEntity();
        $this->assertResponseData($expected, $response);
        // Check the actual file data.
        $this->assertSame($this->testFileData, file_get_contents('public://foobar/example.txt'));
        // Test the file again but using 'filename' in the Content-Disposition
        // header with no 'file' prefix.
        $response = $this->fileRequest($uri, $this->testFileData, [
            'Content-Disposition' => 'filename="example.txt"',
        ]);
        $this->assertSame(201, $response->getStatusCode());
        $expected = $this->getExpectedNormalizedEntity(2, 'example_0.txt');
        $this->assertResponseData($expected, $response);
        // Check the actual file data.
        $this->assertSame($this->testFileData, file_get_contents('public://foobar/example_0.txt'));
        $this->assertTrue($this->fileStorage
            ->loadUnchanged(1)
            ->isTemporary());
        // Verify that we can create an entity that references the uploaded file.
        $entity_test_post_url = Url::fromRoute('rest.entity.entity_test.POST')->setOption('query', [
            '_format' => static::$format,
        ]);
        $request_options = [];
        $request_options[RequestOptions::HEADERS]['Content-Type'] = static::$mimeType;
        $request_options = NestedArray::mergeDeep($request_options, $this->getAuthenticationRequestOptions('POST'));
        $request_options[RequestOptions::BODY] = $this->serializer
            ->encode($this->getNormalizedPostEntity(), static::$format);
        $response = $this->request('POST', $entity_test_post_url, $request_options);
        $this->assertResourceResponse(201, FALSE, $response);
        $this->assertTrue($this->fileStorage
            ->loadUnchanged(1)
            ->isPermanent());
        $this->assertSame([
            [
                'target_id' => '1',
                'display' => NULL,
                'description' => "The most fascinating file ever!",
            ],
        ], EntityTest::load(2)->get('field_rest_file_test')
            ->getValue());
    }
    
    /**
     * Returns the normalized POST entity referencing the uploaded file.
     *
     * @return array
     *
     * @see ::testPostFileUpload()
     * @see \Drupal\Tests\rest\Functional\EntityResource\EntityTest\EntityTestResourceTestBase::getNormalizedPostEntity()
     */
    protected function getNormalizedPostEntity() {
        return [
            'type' => [
                [
                    'value' => 'entity_test',
                ],
            ],
            'name' => [
                [
                    'value' => 'Dramallama',
                ],
            ],
            'field_rest_file_test' => [
                [
                    'target_id' => 1,
                    'description' => 'The most fascinating file ever!',
                ],
            ],
        ];
    }
    
    /**
     * Tests using the file upload POST route with invalid headers.
     */
    public function testPostFileUploadInvalidHeaders() {
        $this->initAuthentication();
        $this->provisionResource([
            static::$format,
        ], static::$auth ? [
            static::$auth,
        ] : [], [
            'POST',
        ]);
        $this->setUpAuthorization('POST');
        $uri = Url::fromUri('base:' . static::$postUri);
        // The wrong content type header should return a 415 code.
        $response = $this->fileRequest($uri, $this->testFileData, [
            'Content-Type' => static::$mimeType,
        ]);
        $this->assertResourceErrorResponse(415, sprintf('No route found that matches "Content-Type: %s"', static::$mimeType), $response);
        // An empty Content-Disposition header should return a 400.
        $response = $this->fileRequest($uri, $this->testFileData, [
            'Content-Disposition' => FALSE,
        ]);
        $this->assertResourceErrorResponse(400, '"Content-Disposition" header is required. A file name in the format "filename=FILENAME" must be provided', $response);
        // An empty filename with a context in the Content-Disposition header should
        // return a 400.
        $response = $this->fileRequest($uri, $this->testFileData, [
            'Content-Disposition' => 'file; filename=""',
        ]);
        $this->assertResourceErrorResponse(400, 'No filename found in "Content-Disposition" header. A file name in the format "filename=FILENAME" must be provided', $response);
        // An empty filename without a context in the Content-Disposition header
        // should return a 400.
        $response = $this->fileRequest($uri, $this->testFileData, [
            'Content-Disposition' => 'filename=""',
        ]);
        $this->assertResourceErrorResponse(400, 'No filename found in "Content-Disposition" header. A file name in the format "filename=FILENAME" must be provided', $response);
        // An invalid key-value pair in the Content-Disposition header should return
        // a 400.
        $response = $this->fileRequest($uri, $this->testFileData, [
            'Content-Disposition' => 'not_a_filename="example.txt"',
        ]);
        $this->assertResourceErrorResponse(400, 'No filename found in "Content-Disposition" header. A file name in the format "filename=FILENAME" must be provided', $response);
        // Using filename* extended format is not currently supported.
        $response = $this->fileRequest($uri, $this->testFileData, [
            'Content-Disposition' => 'filename*="UTF-8 \' \' example.txt"',
        ]);
        $this->assertResourceErrorResponse(400, 'The extended "filename*" format is currently not supported in the "Content-Disposition" header', $response);
    }
    
    /**
     * Tests using the file upload POST route with a duplicate file name.
     *
     * A new file should be created with a suffixed name.
     */
    public function testPostFileUploadDuplicateFile() {
        $this->initAuthentication();
        $this->provisionResource([
            static::$format,
        ], static::$auth ? [
            static::$auth,
        ] : [], [
            'POST',
        ]);
        $this->setUpAuthorization('POST');
        $uri = Url::fromUri('base:' . static::$postUri);
        // This request will have the default 'application/octet-stream' content
        // type header.
        $response = $this->fileRequest($uri, $this->testFileData);
        $this->assertSame(201, $response->getStatusCode());
        // Make the same request again. The file should be saved as a new file
        // entity that has the same file name but a suffixed file URI.
        $response = $this->fileRequest($uri, $this->testFileData);
        $this->assertSame(201, $response->getStatusCode());
        // Loading expected normalized data for file 2, the duplicate file.
        $expected = $this->getExpectedNormalizedEntity(2, 'example_0.txt');
        $this->assertResponseData($expected, $response);
        // Check the actual file data.
        $this->assertSame($this->testFileData, file_get_contents('public://foobar/example_0.txt'));
    }
    
    /**
     * Tests using the file upload POST route twice, simulating a race condition.
     *
     * A validation error should occur when the filenames are not unique.
     */
    public function testPostFileUploadDuplicateFileRaceCondition() {
        $this->initAuthentication();
        $this->provisionResource([
            static::$format,
        ], static::$auth ? [
            static::$auth,
        ] : [], [
            'POST',
        ]);
        $this->setUpAuthorization('POST');
        $uri = Url::fromUri('base:' . static::$postUri);
        // This request will have the default 'application/octet-stream' content
        // type header.
        $response = $this->fileRequest($uri, $this->testFileData);
        $this->assertSame(201, $response->getStatusCode());
        // Simulate a race condition where two files are uploaded at almost the same
        // time, by removing the first uploaded file from disk (leaving the entry in
        // the file_managed table) before trying to upload another file with the
        // same name.
        unlink(\Drupal::service('file_system')->realpath('public://foobar/example.txt'));
        // Make the same request again. The upload should fail validation.
        $response = $this->fileRequest($uri, $this->testFileData);
        $this->assertResourceErrorResponse(422, PlainTextOutput::renderFromHtml("Unprocessable Entity: validation failed.\nuri: The file public://foobar/example.txt already exists. Enter a unique file URI.\n"), $response);
    }
    
    /**
     * Tests using the file upload route with any path prefixes being stripped.
     *
     * @see https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Disposition#Directives
     */
    public function testFileUploadStrippedFilePath() {
        $this->initAuthentication();
        $this->provisionResource([
            static::$format,
        ], static::$auth ? [
            static::$auth,
        ] : [], [
            'POST',
        ]);
        $this->setUpAuthorization('POST');
        $uri = Url::fromUri('base:' . static::$postUri);
        $response = $this->fileRequest($uri, $this->testFileData, [
            'Content-Disposition' => 'file; filename="directory/example.txt"',
        ]);
        $this->assertSame(201, $response->getStatusCode());
        $expected = $this->getExpectedNormalizedEntity();
        $this->assertResponseData($expected, $response);
        // Check the actual file data. It should have been written to the configured
        // directory, not /foobar/directory/example.txt.
        $this->assertSame($this->testFileData, file_get_contents('public://foobar/example.txt'));
        $response = $this->fileRequest($uri, $this->testFileData, [
            'Content-Disposition' => 'file; filename="../../example_2.txt"',
        ]);
        $this->assertSame(201, $response->getStatusCode());
        $expected = $this->getExpectedNormalizedEntity(2, 'example_2.txt', TRUE);
        $this->assertResponseData($expected, $response);
        // Check the actual file data. It should have been written to the configured
        // directory, not /foobar/directory/example.txt.
        $this->assertSame($this->testFileData, file_get_contents('public://foobar/example_2.txt'));
        $this->assertFileDoesNotExist('../../example_2.txt');
        // Check a path from the root. Extensions have to be empty to allow a file
        // with no extension to pass validation.
        $this->field
            ->setSetting('file_extensions', '')
            ->save();
        $this->refreshTestStateAfterRestConfigChange();
        $response = $this->fileRequest($uri, $this->testFileData, [
            'Content-Disposition' => 'file; filename="/etc/passwd"',
        ]);
        $this->assertSame(201, $response->getStatusCode());
        $expected = $this->getExpectedNormalizedEntity(3, 'passwd', TRUE);
        // This mime will be guessed as there is no extension.
        $expected['filemime'][0]['value'] = 'application/octet-stream';
        $this->assertResponseData($expected, $response);
        // Check the actual file data. It should have been written to the configured
        // directory, not /foobar/directory/example.txt.
        $this->assertSame($this->testFileData, file_get_contents('public://foobar/passwd'));
    }
    
    /**
     * Tests using the file upload route with a unicode file name.
     */
    public function testFileUploadUnicodeFilename() {
        $this->initAuthentication();
        $this->provisionResource([
            static::$format,
        ], static::$auth ? [
            static::$auth,
        ] : [], [
            'POST',
        ]);
        $this->setUpAuthorization('POST');
        $uri = Url::fromUri('base:' . static::$postUri);
        // It is important that the filename starts with a unicode character. See
        // https://bugs.php.net/bug.php?id=77239.
        $response = $this->fileRequest($uri, $this->testFileData, [
            'Content-Disposition' => 'file; filename="Èxample-✓.txt"',
        ]);
        $this->assertSame(201, $response->getStatusCode());
        $expected = $this->getExpectedNormalizedEntity(1, 'Èxample-✓.txt', TRUE);
        $this->assertResponseData($expected, $response);
        $this->assertSame($this->testFileData, file_get_contents('public://foobar/Èxample-✓.txt'));
    }
    
    /**
     * Tests using the file upload route with a zero byte file.
     */
    public function testFileUploadZeroByteFile() {
        $this->initAuthentication();
        $this->provisionResource([
            static::$format,
        ], static::$auth ? [
            static::$auth,
        ] : [], [
            'POST',
        ]);
        $this->setUpAuthorization('POST');
        $uri = Url::fromUri('base:' . static::$postUri);
        // Test with a zero byte file.
        $response = $this->fileRequest($uri, NULL);
        $this->assertSame(201, $response->getStatusCode());
        $expected = $this->getExpectedNormalizedEntity();
        // Modify the default expected data to account for the 0 byte file.
        $expected['filesize'][0]['value'] = 0;
        $this->assertResponseData($expected, $response);
        // Check the actual file data.
        $this->assertSame('', file_get_contents('public://foobar/example.txt'));
    }
    
    /**
     * Tests using the file upload route with an invalid file type.
     */
    public function testFileUploadInvalidFileType() {
        $this->initAuthentication();
        $this->provisionResource([
            static::$format,
        ], static::$auth ? [
            static::$auth,
        ] : [], [
            'POST',
        ]);
        $this->setUpAuthorization('POST');
        $uri = Url::fromUri('base:' . static::$postUri);
        // Test with a JSON file.
        $response = $this->fileRequest($uri, '{"test":123}', [
            'Content-Disposition' => 'filename="example.json"',
        ]);
        $this->assertResourceErrorResponse(422, PlainTextOutput::renderFromHtml("Unprocessable Entity: file validation failed.\nOnly files with the following extensions are allowed: <em class=\"placeholder\">txt</em>."), $response);
        // Make sure that no file was saved.
        $this->assertEmpty(File::load(1));
        $this->assertFileDoesNotExist('public://foobar/example.txt');
    }
    
    /**
     * Tests using the file upload route with a file size larger than allowed.
     */
    public function testFileUploadLargerFileSize() {
        // Set a limit of 50 bytes.
        $this->field
            ->setSetting('max_filesize', 50)
            ->save();
        $this->refreshTestStateAfterRestConfigChange();
        $this->initAuthentication();
        $this->provisionResource([
            static::$format,
        ], static::$auth ? [
            static::$auth,
        ] : [], [
            'POST',
        ]);
        $this->setUpAuthorization('POST');
        $uri = Url::fromUri('base:' . static::$postUri);
        // Generate a string larger than the 50 byte limit set.
        $response = $this->fileRequest($uri, $this->randomString(100));
        $this->assertResourceErrorResponse(422, PlainTextOutput::renderFromHtml("Unprocessable Entity: file validation failed.\nThe file is <em class=\"placeholder\">100 bytes</em> exceeding the maximum file size of <em class=\"placeholder\">50 bytes</em>."), $response);
        // Make sure that no file was saved.
        $this->assertEmpty(File::load(1));
        $this->assertFileDoesNotExist('public://foobar/example.txt');
    }
    
    /**
     * Tests using the file upload POST route with malicious extensions.
     */
    public function testFileUploadMaliciousExtension() {
        $this->initAuthentication();
        $this->provisionResource([
            static::$format,
        ], static::$auth ? [
            static::$auth,
        ] : [], [
            'POST',
        ]);
        // Allow all file uploads but system.file::allow_insecure_uploads is set to
        // FALSE.
        $this->field
            ->setSetting('file_extensions', '')
            ->save();
        $this->refreshTestStateAfterRestConfigChange();
        $this->setUpAuthorization('POST');
        $uri = Url::fromUri('base:' . static::$postUri);
        $php_string = '<?php print "Drupal"; ?>';
        // Test using a masked exploit file.
        $response = $this->fileRequest($uri, $php_string, [
            'Content-Disposition' => 'filename="example.php"',
        ]);
        // The filename is not munged because .txt is added and it is a known
        // extension to apache.
        $expected = $this->getExpectedNormalizedEntity(1, 'example.php_.txt', TRUE);
        // Override the expected filesize.
        $expected['filesize'][0]['value'] = strlen($php_string);
        $this->assertResponseData($expected, $response);
        $this->assertFileExists('public://foobar/example.php_.txt');
        // Add .php and .txt as allowed extensions. Since 'allow_insecure_uploads'
        // is FALSE, .php files should be renamed to have a .txt extension.
        $this->field
            ->setSetting('file_extensions', 'php txt')
            ->save();
        $this->refreshTestStateAfterRestConfigChange();
        $response = $this->fileRequest($uri, $php_string, [
            'Content-Disposition' => 'filename="example_2.php"',
        ]);
        $expected = $this->getExpectedNormalizedEntity(2, 'example_2.php_.txt', TRUE);
        // Override the expected filesize.
        $expected['filesize'][0]['value'] = strlen($php_string);
        $this->assertResponseData($expected, $response);
        $this->assertFileExists('public://foobar/example_2.php_.txt');
        $this->assertFileDoesNotExist('public://foobar/example_2.php');
        // Allow .doc file uploads and ensure even a mis-configured apache will not
        // fallback to php because the filename will be munged.
        $this->field
            ->setSetting('file_extensions', 'doc')
            ->save();
        $this->refreshTestStateAfterRestConfigChange();
        // Test using a masked exploit file.
        $response = $this->fileRequest($uri, $php_string, [
            'Content-Disposition' => 'filename="example_3.php.doc"',
        ]);
        // The filename is munged.
        $expected = $this->getExpectedNormalizedEntity(3, 'example_3.php_.doc', TRUE);
        // Override the expected filesize.
        $expected['filesize'][0]['value'] = strlen($php_string);
        // The file mime should be 'application/msword'.
        $expected['filemime'][0]['value'] = 'application/msword';
        $this->assertResponseData($expected, $response);
        $this->assertFileExists('public://foobar/example_3.php_.doc');
        $this->assertFileDoesNotExist('public://foobar/example_3.php.doc');
        // Test that a dangerous extension such as .php is munged even if it is in
        // the list of allowed extensions.
        $this->field
            ->setSetting('file_extensions', 'doc php')
            ->save();
        $this->refreshTestStateAfterRestConfigChange();
        // Test using a masked exploit file.
        $response = $this->fileRequest($uri, $php_string, [
            'Content-Disposition' => 'filename="example_4.php.doc"',
        ]);
        // The filename is munged.
        $expected = $this->getExpectedNormalizedEntity(4, 'example_4.php_.doc', TRUE);
        // Override the expected filesize.
        $expected['filesize'][0]['value'] = strlen($php_string);
        // The file mime should be 'application/msword'.
        $expected['filemime'][0]['value'] = 'application/msword';
        $this->assertResponseData($expected, $response);
        $this->assertFileExists('public://foobar/example_4.php_.doc');
        $this->assertFileDoesNotExist('public://foobar/example_4.php.doc');
        // Dangerous extensions are munged even when all extensions are allowed.
        $this->field
            ->setSetting('file_extensions', '')
            ->save();
        $this->rebuildAll();
        $response = $this->fileRequest($uri, $php_string, [
            'Content-Disposition' => 'filename="example_5.php.png"',
        ]);
        $expected = $this->getExpectedNormalizedEntity(5, 'example_5.php_.png', TRUE);
        // Override the expected filesize.
        $expected['filesize'][0]['value'] = strlen($php_string);
        // The file mime should still see this as a PNG image.
        $expected['filemime'][0]['value'] = 'image/png';
        $this->assertResponseData($expected, $response);
        $this->assertFileExists('public://foobar/example_5.php_.png');
        // Dangerous extensions are munged if is renamed to end in .txt.
        $response = $this->fileRequest($uri, $php_string, [
            'Content-Disposition' => 'filename="example_6.cgi.png.txt"',
        ]);
        $expected = $this->getExpectedNormalizedEntity(6, 'example_6.cgi_.png_.txt', TRUE);
        // Override the expected filesize.
        $expected['filesize'][0]['value'] = strlen($php_string);
        // The file mime should also now be text.
        $expected['filemime'][0]['value'] = 'text/plain';
        $this->assertResponseData($expected, $response);
        $this->assertFileExists('public://foobar/example_6.cgi_.png_.txt');
        // Add .php as an allowed extension without .txt. Since insecure uploads are
        // not allowed, .php files will be rejected.
        $this->field
            ->setSetting('file_extensions', 'php')
            ->save();
        $this->refreshTestStateAfterRestConfigChange();
        $response = $this->fileRequest($uri, $php_string, [
            'Content-Disposition' => 'filename="example_7.php"',
        ]);
        $this->assertResourceErrorResponse(422, "Unprocessable Entity: file validation failed.\nFor security reasons, your upload has been rejected.", $response);
        // Make sure that no file was saved.
        $this->assertFileDoesNotExist('public://foobar/example_7.php');
        $this->assertFileDoesNotExist('public://foobar/example_7.php.txt');
        // Now allow insecure uploads.
        \Drupal::configFactory()->getEditable('system.file')
            ->set('allow_insecure_uploads', TRUE)
            ->save();
        // Allow all file uploads. This is very insecure.
        $this->field
            ->setSetting('file_extensions', '')
            ->save();
        $this->refreshTestStateAfterRestConfigChange();
        $response = $this->fileRequest($uri, $php_string, [
            'Content-Disposition' => 'filename="example_7.php"',
        ]);
        $expected = $this->getExpectedNormalizedEntity(7, 'example_7.php', TRUE);
        // Override the expected filesize.
        $expected['filesize'][0]['value'] = strlen($php_string);
        // The file mime should also now be PHP.
        $expected['filemime'][0]['value'] = 'application/x-httpd-php';
        $this->assertResponseData($expected, $response);
        $this->assertFileExists('public://foobar/example_7.php');
    }
    
    /**
     * Tests using the file upload POST route no extension configured.
     */
    public function testFileUploadNoExtensionSetting() {
        $this->initAuthentication();
        $this->provisionResource([
            static::$format,
        ], static::$auth ? [
            static::$auth,
        ] : [], [
            'POST',
        ]);
        $this->setUpAuthorization('POST');
        $uri = Url::fromUri('base:' . static::$postUri);
        $this->field
            ->setSetting('file_extensions', '')
            ->save();
        $this->refreshTestStateAfterRestConfigChange();
        $response = $this->fileRequest($uri, $this->testFileData, [
            'Content-Disposition' => 'filename="example.txt"',
        ]);
        $expected = $this->getExpectedNormalizedEntity(1, 'example.txt', TRUE);
        $this->assertResponseData($expected, $response);
        $this->assertFileExists('public://foobar/example.txt');
    }
    
    /**
     * {@inheritdoc}
     */
    protected function assertNormalizationEdgeCases($method, Url $url, array $request_options) {
        // The file upload resource only accepts binary data, so there are no
        // normalization edge cases to test, as there are no normalized entity
        // representations incoming.
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getExpectedUnauthorizedAccessMessage($method) {
        return "The following permissions are required: 'administer entity_test content' OR 'administer entity_test_with_bundle content' OR 'create entity_test entity_test_with_bundle entities'.";
    }
    
    /**
     * Gets the expected file entity.
     *
     * @param int $fid
     *   The file ID to load and create normalized data for.
     * @param string $expected_filename
     *   The expected filename for the stored file.
     * @param bool $expected_as_filename
     *   Whether the expected filename should be the filename property too.
     *
     * @return array
     *   The expected normalized data array.
     */
    protected function getExpectedNormalizedEntity($fid = 1, $expected_filename = 'example.txt', $expected_as_filename = FALSE) {
        $author = User::load(static::$auth ? $this->account
            ->id() : 0);
        $file = File::load($fid);
        $expected_normalization = [
            'fid' => [
                [
                    'value' => (int) $file->id(),
                ],
            ],
            'uuid' => [
                [
                    'value' => $file->uuid(),
                ],
            ],
            'langcode' => [
                [
                    'value' => 'en',
                ],
            ],
            'uid' => [
                [
                    'target_id' => (int) $author->id(),
                    'target_type' => 'user',
                    'target_uuid' => $author->uuid(),
                    'url' => base_path() . 'user/' . $author->id(),
                ],
            ],
            'filename' => [
                [
                    'value' => $expected_as_filename ? $expected_filename : 'example.txt',
                ],
            ],
            'uri' => [
                [
                    'value' => 'public://foobar/' . $expected_filename,
                    'url' => base_path() . $this->siteDirectory . '/files/foobar/' . rawurlencode($expected_filename),
                ],
            ],
            'filemime' => [
                [
                    'value' => 'text/plain',
                ],
            ],
            'filesize' => [
                [
                    'value' => strlen($this->testFileData),
                ],
            ],
            'status' => [
                [
                    'value' => FALSE,
                ],
            ],
            'created' => [
                [
                    'value' => (new \DateTime())->setTimestamp($file->getCreatedTime())
                        ->setTimezone(new \DateTimeZone('UTC'))
                        ->format(\DateTime::RFC3339),
                    'format' => \DateTime::RFC3339,
                ],
            ],
            'changed' => [
                [
                    'value' => (new \DateTime())->setTimestamp($file->getChangedTime())
                        ->setTimezone(new \DateTimeZone('UTC'))
                        ->format(\DateTime::RFC3339),
                    'format' => \DateTime::RFC3339,
                ],
            ],
        ];
        return $expected_normalization;
    }
    
    /**
     * Performs a file upload request. Wraps the Guzzle HTTP client.
     *
     * @see \GuzzleHttp\ClientInterface::request()
     *
     * @param \Drupal\Core\Url $url
     *   URL to request.
     * @param string $file_contents
     *   The file contents to send as the request body.
     * @param array $headers
     *   Additional headers to send with the request. Defaults will be added for
     *   Content-Type and Content-Disposition. In order to remove the defaults set
     *   the header value to FALSE.
     *
     * @return \Psr\Http\Message\ResponseInterface
     */
    protected function fileRequest(Url $url, $file_contents, array $headers = []) {
        // Set the format for the response.
        $url->setOption('query', [
            '_format' => static::$format,
        ]);
        $request_options = [];
        $headers = $headers + [
            // Set the required (and only accepted) content type for the request.
'Content-Type' => 'application/octet-stream',
            // Set the required Content-Disposition header for the file name.
'Content-Disposition' => 'file; filename="example.txt"',
        ];
        $request_options[RequestOptions::HEADERS] = array_filter($headers, function ($value) {
            return $value !== FALSE;
        });
        $request_options[RequestOptions::BODY] = $file_contents;
        $request_options = NestedArray::mergeDeep($request_options, $this->getAuthenticationRequestOptions('POST'));
        return $this->request('POST', $url, $request_options);
    }
    
    /**
     * {@inheritdoc}
     */
    protected function setUpAuthorization($method) {
        switch ($method) {
            case 'GET':
                $this->grantPermissionsToTestedRole([
                    'view test entity',
                ]);
                break;
            case 'POST':
                $this->grantPermissionsToTestedRole([
                    'create entity_test entity_test_with_bundle entities',
                    'access content',
                ]);
                break;
        }
    }
    
    /**
     * Asserts expected normalized data matches response data.
     *
     * @param array $expected
     *   The expected data.
     * @param \Psr\Http\Message\ResponseInterface $response
     *   The file upload response.
     */
    protected function assertResponseData(array $expected, ResponseInterface $response) {
        static::recursiveKSort($expected);
        $actual = $this->serializer
            ->decode((string) $response->getBody(), static::$format);
        static::recursiveKSort($actual);
        $this->assertSame($expected, $actual);
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getExpectedUnauthorizedAccessCacheability() {
        // There is cacheability metadata to check as file uploads only allows POST
        // requests, which will not return cacheable responses.
        return new CacheableMetadata();
    }

}