class FileManagedTestBase

abstract class FileManagedTestBase extends BrowserTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'file_test',
        'file',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() {
        parent::setUp();
        // Clear out any hook calls.
        file_test_reset();
    }
    
    /**
     * Asserts that the specified file hooks were called only once.
     *
     * @param string[] $expected
     *   An array of strings containing with the hook name; for example, 'load',
     *   'save', 'insert', etc.
     */
    public function assertFileHooksCalled($expected) {
        \Drupal::state()->resetCache();
        // Determine which hooks were called.
        $actual = array_keys(array_filter(file_test_get_all_calls()));
        // Determine if there were any expected that were not called.
        $uncalled = array_diff($expected, $actual);
        if (count($uncalled)) {
            $this->assertTrue(FALSE, new FormattableMarkup('Expected hooks %expected to be called but %uncalled was not called.', [
                '%expected' => implode(', ', $expected),
                '%uncalled' => implode(', ', $uncalled),
            ]));
        }
        else {
            $this->assertTrue(TRUE, new FormattableMarkup('All the expected hooks were called: %expected', [
                '%expected' => empty($expected) ? '(none)' : implode(', ', $expected),
            ]));
        }
        // Determine if there were any unexpected calls.
        $unexpected = array_diff($actual, $expected);
        if (count($unexpected)) {
            $this->assertTrue(FALSE, new FormattableMarkup('Unexpected hooks were called: %unexpected.', [
                '%unexpected' => empty($unexpected) ? '(none)' : implode(', ', $unexpected),
            ]));
        }
        else {
            $this->assertTrue(TRUE, 'No unexpected hooks were called.');
        }
    }
    
    /**
     * Assert that a hook_file_* hook was called a certain number of times.
     *
     * @param string $hook
     *   String with the hook name; for instance, 'load', 'save', 'insert', etc.
     * @param int $expected_count
     *   Optional integer count.
     * @param string|null $message
     *   Optional translated string message.
     */
    public function assertFileHookCalled($hook, $expected_count = 1, $message = NULL) {
        $actual_count = count(file_test_get_calls($hook));
        if (!isset($message)) {
            if ($actual_count == $expected_count) {
                $message = new FormattableMarkup('hook_file_@name was called correctly.', [
                    '@name' => $hook,
                ]);
            }
            elseif ($expected_count == 0) {
                $message = \Drupal::translation()->formatPlural($actual_count, 'hook_file_@name was not expected to be called but was actually called once.', 'hook_file_@name was not expected to be called but was actually called @count times.', [
                    '@name' => $hook,
                    '@count' => $actual_count,
                ]);
            }
            else {
                $message = new FormattableMarkup('hook_file_@name was expected to be called %expected times but was called %actual times.', [
                    '@name' => $hook,
                    '%expected' => $expected_count,
                    '%actual' => $actual_count,
                ]);
            }
        }
        $this->assertEquals($expected_count, $actual_count, $message);
    }
    
    /**
     * Asserts that two files have the same values (except timestamp).
     *
     * @param \Drupal\file\FileInterface $before
     *   File object to compare.
     * @param \Drupal\file\FileInterface $after
     *   File object to compare.
     */
    public function assertFileUnchanged(FileInterface $before, FileInterface $after) {
        $this->assertEquals($before->id(), $after->id());
        $this->assertEquals($before->getOwner()
            ->id(), $after->getOwner()
            ->id());
        $this->assertEquals($before->getFilename(), $after->getFilename());
        $this->assertEquals($before->getFileUri(), $after->getFileUri());
        $this->assertEquals($before->getMimeType(), $after->getMimeType());
        $this->assertEquals($before->getSize(), $after->getSize());
        $this->assertEquals($before->isPermanent(), $after->isPermanent());
    }
    
    /**
     * Asserts that two files are not the same by comparing the fid and filepath.
     *
     * @param \Drupal\file\FileInterface $file1
     *   File object to compare.
     * @param \Drupal\file\FileInterface $file2
     *   File object to compare.
     */
    public function assertDifferentFile(FileInterface $file1, FileInterface $file2) {
        $this->assertNotEquals($file1->id(), $file2->id());
        $this->assertNotEquals($file1->getFileUri(), $file2->getFileUri());
    }
    
    /**
     * Asserts that two files are the same by comparing the fid and filepath.
     *
     * @param \Drupal\file\FileInterface $file1
     *   File object to compare.
     * @param \Drupal\file\FileInterface $file2
     *   File object to compare.
     */
    public function assertSameFile(FileInterface $file1, FileInterface $file2) {
        $this->assertEquals($file1->id(), $file2->id());
        $this->assertEquals($file1->getFileUri(), $file2->getFileUri());
    }
    
    /**
     * Creates and saves a file, asserting that it was saved.
     *
     * @param string $filepath
     *   Optional string specifying the file path. If none is provided then a
     *   randomly named file will be created in the site's files directory.
     * @param string $contents
     *   Optional contents to save into the file. If a NULL value is provided an
     *   arbitrary string will be used.
     * @param string $scheme
     *   Optional string indicating the stream scheme to use. Drupal core includes
     *   public, private, and temporary. The public wrapper is the default.
     *
     * @return \Drupal\file\FileInterface
     *   File entity.
     */
    public function createFile($filepath = NULL, $contents = NULL, $scheme = NULL) {
        // Don't count hook invocations caused by creating the file.
        \Drupal::state()->set('file_test.count_hook_invocations', FALSE);
        $file = File::create([
            'uri' => $this->createUri($filepath, $contents, $scheme),
            'uid' => 1,
        ]);
        $file->save();
        // Write the record directly rather than using the API so we don't invoke
        // the hooks.
        // Verify that the file was added to the database.
        $this->assertGreaterThan(0, $file->id());
        \Drupal::state()->set('file_test.count_hook_invocations', TRUE);
        return $file;
    }
    
    /**
     * Creates a file and returns its URI.
     *
     * @param string $filepath
     *   Optional string specifying the file path. If none is provided then a
     *   randomly named file will be created in the site's files directory.
     * @param string $contents
     *   Optional contents to save into the file. If a NULL value is provided an
     *   arbitrary string will be used.
     * @param string $scheme
     *   Optional string indicating the stream scheme to use. Drupal core includes
     *   public, private, and temporary. The public wrapper is the default.
     *
     * @return string
     *   File URI.
     */
    public function createUri($filepath = NULL, $contents = NULL, $scheme = NULL) {
        if (!isset($filepath)) {
            // Prefix with non-latin characters to ensure that all file-related
            // tests work with international filenames.
            // cSpell:disable-next-line
            $filepath = 'Файл для тестирования ' . $this->randomMachineName();
        }
        if (!isset($scheme)) {
            $scheme = 'public';
        }
        $filepath = $scheme . '://' . $filepath;
        if (!isset($contents)) {
            $contents = "file_put_contents() doesn't seem to appreciate empty strings so let's put in some data.";
        }
        file_put_contents($filepath, $contents);
        $this->assertFileExists($filepath);
        return $filepath;
    }

}