[Feature] How to test failed transactions?

[Andreas-Schoenefeldt]

🚀 An easy way to test failed transaction. Right now it seems not to be possible?

Basically the answer to this question: https://stackoverflow.com/questions/73150831/how-to-test-failed-transactions-with-the-paypal-js-sdk

Motivation

Testing failed payment paths is crucial to any integration. It is not understandable, that there appears to be no easy way to do it with paypal.

Example

It should be something very straight foreward:

1. Login to a sandbox test account
2. Use a certain card
3. get 100% an error corresponding to live errors