container, [], 'custom_migration', []); $cck_file_migration = CckFile::create($this->container, ['migration' => 'custom_file'], 'custom_file', [], $migration); $migration_plugin = $this->readAttribute($cck_file_migration, 'migrationPlugin'); $config = $this->readAttribute($migration_plugin, 'configuration'); $this->assertEquals($config['migration'], 'custom_file'); } }