title: 2checkout test payment simulation
body: <p>In a <strong>php</strong> application of mine, <strong>I am looking for help on how to simulate test payment  with <a href="https://www.2checkout.com/" rel="nofollow noreferrer">https://www.2checkout.com/</a>.</strong>  I have experience with test payment for <strong>Paypal sandbox using developer account</strong>. But in here 2checkout I can't figure it out.</p>