public function testSetFormTheme()
{
// prepare test data
$this->rawLayout->add('root', null, 'root');
// do test
$this->rawLayout->setFormTheme(['MyBundle:Layout:theme1.html.twig', 'MyBundle:Layout:theme2.html.twig']);
$this->rawLayout->setFormTheme('MyBundle:Layout:theme3.html.twig');
$formThemes = $this->rawLayout->getFormThemes();
$this->assertSame(['MyBundle:Layout:theme1.html.twig', 'MyBundle:Layout:theme2.html.twig', 'MyBundle:Layout:theme3.html.twig'], $formThemes);
}
