Elgg\UploadServiceTest::testCanFilterUploadAction PHP Method

    public function testCanFilterUploadAction()
    {
        $tmp = new ElggFile();
        $tmp->owner_guid = $this->owner_guid;
        $tmp->setFilename('tmp.gif');
        $tmp->open('write');
        $tmp->write(file_get_contents(elgg_get_config('dataroot') . '1/1/400x300.gif'));
        $tmp->close();
        $tmp_file = $tmp->getFilenameOnFilestore();
        $upload = ['gif' => new UploadedFile($tmp_file, 'tmp.gif', 'image/gif', filesize($tmp_file), UPLOAD_ERR_OK, true)];
        _elgg_services()->request->files->set('upload', $upload);
        $file = new ElggFile();
        $file->owner_guid = $this->owner_guid;
        $uploaded_files = _elgg_services()->uploads->getUploadedFiles('upload');
        $uploaded_file = array_shift($uploaded_files);
        $upload_event_calls = 0;
        $upload_hook_calls = 0;
        _elgg_services()->events->registerHandler('upload:after', 'file', function ($event, $type, $object) use(&$upload_event_calls) {
            $this->assertEquals('upload:after', $event);
            $this->assertEquals('file', $type);
            $this->assertInstanceOf(\ElggFile::class, $object);
            $upload_event_calls++;
        });
        _elgg_services()->hooks->registerHandler('upload', 'file', function ($hook, $type, $return, $params) use(&$upload_hook_calls) {
            $this->assertNull($return);
            $this->assertEquals('upload', $hook);
            $this->assertEquals('file', $type);
            $this->assertInstanceOf(\ElggFile::class, $params['file']);
            $this->assertInstanceOf(UploadedFile::class, $params['upload']);
            $upload_hook_calls++;
            return false;
        });
        $this->assertFalse($file->acceptUploadedFile($uploaded_file));
        $this->assertEquals(0, $upload_event_calls);
        $this->assertEquals(1, $upload_hook_calls);
        $this->assertFalse($file->exists());
        _elgg_services()->hooks->registerHandler('upload', 'file', function () use(&$upload_hook_calls) {
            $upload_hook_calls++;
            return true;
        });
        $this->assertTrue($file->acceptUploadedFile($uploaded_file));
        $this->assertEquals(1, $upload_event_calls);
        $this->assertEquals(3, $upload_hook_calls);
        $this->assertFalse($file->exists());
    }