public function testRender()
 {
     $class = $this->getRendererClass();
     $renderer = new $class();
     $header = new Heading(2, 'HEADING!!');
     $header->appendChild(new Text('HEADING!!'));
     $color = new Color();
     $color->setForceStyle(true);
     $cliRenderer = new CliRenderer([], [Text::class => new TextRenderer()], $color);
     $this->assertEquals("\n## HEADING!!\n", $renderer->render($header, $cliRenderer));
 }