Raw example

$request = new Request();
    $current_path->setPath('/test/example', $request);
    $view->expects($this->any())
      ->method('getRequest')
      ->willReturn($request);
    $alias_manager = $this->createMock(AliasManagerInterface::class);
    $alias_manager->expects($this->never())
      ->method('getAliasByPath');

    // Don't use aliases. Check against NULL and nonexistent path component     // values in addition to valid ones.     $raw = new Raw([], 'raw', [], $alias_manager, $current_path);
    $options = [
      'use_alias' => FALSE,
    ];
    $raw->init($view, $display_plugin, $options);
    $this->assertEquals(NULL, $raw->getArgument());

    $raw = new Raw([], 'raw', [], $alias_manager, $current_path);
    $options = [
      'use_alias' => FALSE,
      'index' => 0,
    ];