WPSEO_OpenGraph::website_facebook PHP Méthode

    public function website_facebook()
    {
        if ('article' === $this->type(false) && !empty($this->options['facebook_site'])) {
            $this->og_tag('article:publisher', $this->options['facebook_site']);
            return true;
        }
        return false;
    }

 /**
  * @covers WPSEO_OpenGraph::website_facebook
  */
 public function test_website_facebook()
 {
     // option not set
     $this->assertFalse(self::$class_instance->website_facebook());
     // set option
     self::$class_instance->options['facebook_site'] = 'http://facebook.com/mysite/';
     // test output
     $this->assertTrue(self::$class_instance->website_facebook());
     $this->expectOutput('<meta property="article:publisher" content="http://facebook.com/mysite/" />' . "\n");
 }