public function testAdd() { $this->rawLayoutBuilder->add('root', null, 'root')->add('header', 'root', 'header')->add('logo', 'header', 'logo', ['title' => 'test']); $this->assertTrue($this->rawLayoutBuilder->has('root')); $this->assertTrue($this->rawLayoutBuilder->has('header')); $this->assertTrue($this->rawLayoutBuilder->has('logo')); }