public function test_interval_after()
 {
     $post = new WP_Post((object) array('post_type' => Reminder\CPT::TYPE, 'ID' => 1));
     WP_Mock::wpFunction('get_post_meta', array('times' => 1, 'args' => array(1, '_itelic_renewal_reminder_days', true), 'return' => 5));
     WP_Mock::wpFunction('get_post_meta', array('times' => 1, 'args' => array(1, '_itelic_renewal_reminder_boa', true), 'return' => Reminder::TYPE_AFTER));
     $reminder = new Reminder($post);
     $expects = new DateInterval('P5D');
     $expects->invert = true;
     $this->assertEquals($expects, $reminder->get_interval());
 }