title: How to test "Payment Gateway" without making real payments?
body: <p>I want to perform rigrous testing on <code>Payment Gateway(2checkout)</code> and <code>Pay Pal</code>. For testing, I need to simulate a large number of successful, failed and halted transactions (transaction stopped due to system crash/reboot). But I don't want to make actual payments. </p>
  
  <p><strong>1. Is there any way I can make a test transaction on payment gateway, using fake card numbers or something else.</strong>
  <br><strong>2. What are the possible advance testing scenarios for Payment Gateway testing?</strong><br></p>
  
  <p>For example: </p>
  
  <ol>
  <li>Changing the amount, unmask CVV or card from Inspect
  element.</li>
  <li>List item</li>
  </ol>