public function testDatagridHeaderRenderBlock()
 {
     $datagrid = $this->factory->createDatagrid('grid', []);
     $datagrid->setData([['title' => 'This is value 1']]);
     $view = $datagrid->createView();
     $template = $this->prophesize('\\Twig_Template');
     $template->getParent([])->willReturn(false);
     $template->hasBlock('datagrid_grid_header')->willReturn(false)->shouldBeCalled();
     $template->hasBlock('datagrid_header')->willReturn(true)->shouldBeCalled();
     $template->displayBlock('datagrid_header', ['headers' => [], 'vars' => [], 'global_var' => 'global_value'])->willReturn(true);
     $this->extension->setBaseTheme($template->reveal());
     $this->extension->datagridHeader($view);
 }