/**
* @covers WPSEO_OpenGraph::publish_date
*/
public function test_publish_date()
{
// not on singular, should return false
$this->assertFalse(self::$class_instance->publish_date());
// create post, without tags
$post_id = $this->factory->post->create();
$this->go_to(get_permalink($post_id));
// test published_time tags output
$published_time = get_the_date('c');
$published_output = '<meta property="article:published_time" content="' . $published_time . '" />' . "\n";
$this->assertTrue(self::$class_instance->publish_date());
$this->expectOutput($published_output);
// modify post time
global $post;
$post = get_post($post_id);
$post->post_modified = gmdate('Y-m-d H:i:s', time() + 1);
$post->post_modified_gmt = gmdate('Y-m-d H:i:s', time() + 1 + get_option('gmt_offset') * HOUR_IN_SECONDS);
// test modified tags output
$modified_time = get_the_modified_date('c');
$modified_output = '<meta property="article:modified_time" content="' . $modified_time . '" />' . "\n" . '<meta property="og:updated_time" content="' . $modified_time . '" />' . "\n";
$this->assertTrue(self::$class_instance->publish_date());
$this->expectOutput($published_output . $modified_output);
}
