protected static function assertRendersCss(ViewComponentInterface $component, $url)
 {
     $output = $component->render();
     self::assertStringStartsWith('<link ', $output);
     self::assertContains("href=\"{$url}\"", $output);
 }
 /**
  * @param ViewComponentInterface|AutoSubmittingInputInterface $component
  */
 protected function assertTurnedOn($component)
 {
     self::assertContains($this->submitScriptMarker, $component->render());
     self::assertTrue($component->isAutoSubmitted());
     self::assertTrue($component->getAutoSubmitting());
 }