/** * @covers WPSEO_Sitemaps::get_last_modified */ public function test_get_last_modified() { // create and go to post $post_id = $this->factory->post->create(); $this->go_to(get_permalink($post_id)); $date = self::$class_instance->get_last_modified(array('post')); $post = get_post($post_id); $this->assertEquals($date, date('c', strtotime($post->post_modified_gmt))); }