class FileItemTest

class FileItemTest extends FieldKernelTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'file',
    ];
    
    /**
     * Created file entity.
     *
     * @var \Drupal\file\Entity\File
     */
    protected $file;
    
    /**
     * Directory where the sample files are stored.
     *
     * @var string
     */
    protected $directory;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->installEntitySchema('user');
        $this->installConfig([
            'user',
        ]);
        // Give anonymous users permission to access content, so they can view and
        // download public files.
        $anonymous_role = Role::load(Role::ANONYMOUS_ID);
        $anonymous_role->grantPermission('access content');
        $anonymous_role->save();
        $this->installEntitySchema('file');
        $this->installSchema('file', [
            'file_usage',
        ]);
        FieldStorageConfig::create([
            'field_name' => 'file_test',
            'entity_type' => 'entity_test',
            'type' => 'file',
            'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
        ])->save();
        $this->directory = $this->getRandomGenerator()
            ->name(8);
        FieldConfig::create([
            'entity_type' => 'entity_test',
            'field_name' => 'file_test',
            'bundle' => 'entity_test',
            'settings' => [
                'file_directory' => $this->directory,
            ],
        ])
            ->save();
        file_put_contents('public://example.txt', $this->randomMachineName());
        $this->file = File::create([
            'uri' => 'public://example.txt',
        ]);
        $this->file
            ->save();
    }
    
    /**
     * Tests using entity fields of the file field type.
     */
    public function testFileItem() {
        // Check that the selection handler was automatically assigned to
        // 'default:file'.
        $field_definition = FieldConfig::load('entity_test.entity_test.file_test');
        $handler_id = $field_definition->getSetting('handler');
        $this->assertEquals('default:file', $handler_id);
        // Create a test entity with the
        $entity = EntityTest::create();
        $entity->file_test->target_id = $this->file
            ->id();
        $entity->file_test->display = 1;
        $entity->file_test->description = $description = $this->randomMachineName();
        $entity->name->value = $this->randomMachineName();
        $entity->save();
        $entity = EntityTest::load($entity->id());
        $this->assertInstanceOf(FieldItemListInterface::class, $entity->file_test);
        $this->assertInstanceOf(FieldItemInterface::class, $entity->file_test[0]);
        $this->assertEquals($this->file
            ->id(), $entity->file_test->target_id);
        $this->assertEquals(1, $entity->file_test->display);
        $this->assertEquals($description, $entity->file_test->description);
        $this->assertEquals($this->file
            ->getFileUri(), $entity->file_test->entity
            ->getFileUri());
        $this->assertEquals($this->file
            ->id(), $entity->file_test->entity
            ->id());
        $this->assertEquals($this->file
            ->uuid(), $entity->file_test->entity
            ->uuid());
        // Make sure the computed files reflects updates to the file.
        file_put_contents('public://example-2.txt', $this->randomMachineName());
        $file2 = File::create([
            'uri' => 'public://example-2.txt',
        ]);
        $file2->save();
        $entity->file_test->target_id = $file2->id();
        $this->assertEquals($entity->file_test->entity
            ->id(), $file2->id());
        $this->assertEquals($entity->file_test->entity
            ->getFileUri(), $file2->getFileUri());
        // Test the deletion of an entity having an entity reference field targeting
        // a non-existing entity.
        $file2->delete();
        $entity->delete();
        // Test the generateSampleValue() method.
        $entity = EntityTest::create();
        $entity->file_test
            ->generateSampleItems();
        $this->entityValidateAndSave($entity);
        // Verify that the sample file was stored in the correct directory.
        $uri = $entity->file_test->entity
            ->getFileUri();
        
        /** @var \Drupal\Core\StreamWrapper\StreamWrapperManagerInterface $stream_wrapper_manager */
        $stream_wrapper_manager = \Drupal::service('stream_wrapper_manager');
        $this->assertEquals($this->directory, dirname($stream_wrapper_manager::getTarget($uri)));
        // Make sure the computed files reflects updates to the file.
        file_put_contents('public://example-3.txt', $this->randomMachineName());
        // Test unsaved file entity.
        $file3 = File::create([
            'uri' => 'public://example-3.txt',
        ]);
        $display = \Drupal::service('entity_display.repository')->getViewDisplay('entity_test', 'entity_test');
        $display->setComponent('file_test', [
            'label' => 'above',
            'type' => 'file_default',
            'weight' => 1,
        ])
            ->save();
        $entity = EntityTest::create();
        $entity->file_test = [
            'entity' => $file3,
        ];
        $uri = $file3->getFileUri();
        $output = \Drupal::entityTypeManager()->getViewBuilder('entity_test')
            ->view($entity, 'default');
        \Drupal::service('renderer')->renderRoot($output);
        $this->assertTrue(!empty($entity->file_test->entity));
        $this->assertEquals($uri, $entity->file_test->entity
            ->getFileUri());
    }

}