foo'; $html = new HtmlString('

foo

'); $this->assertEquals($str, $html->toHtml()); } public function testToString() { $str = '

foo

'; $html = new HtmlString('

foo

'); $this->assertEquals($str, (string) $html); } public function testIsEmpty() { $this->assertTrue((new HtmlString(''))->isEmpty()); } public function testIsNotEmpty() { $this->assertTrue((new HtmlString('foo'))->isNotEmpty()); } }