Facebook\InstantArticles\Elements\InstantArticleTest::testIsValid PHP Method

    public function testIsValid()
    {
        $ia = InstantArticle::create()->withCanonicalURL('http://wp.localtest.me/2016/04/12/stress-on-earth/')->enableAutomaticAdPlacement()->withHeader(Header::create()->withTitle(H1::create()->appendText('Peace on <b>earth</b>'))->addAuthor(Author::create()->withName('bill'))->withPublishTime(Time::create(Time::PUBLISHED)->withDatetime(\DateTime::createFromFormat('j-M-Y G:i:s', '14-Aug-1984 19:30:00'))))->addChild(Paragraph::create()->appendText('Yes, peace is good for everybody!')->appendText(LineBreak::create())->appendText(' Man kind.'));
        $this->assertTrue($ia->isValid());
    }