Allow to check the parameters sent by using registerEndpoint

[xavier-ottolini]

Describe the feature

The function "registerEndpoint" is an interesting feature to check if a request is sent, and to check the response parsing.

However, it would be also useful to check which params are sent in the URL, in the query parameters and in the body.

Additional information

• Would you be willing to help implement this feature?
• Could this feature be implemented as a module?

Final checks

• Read the contribution guide.
• Check existing discussions and issues.

[Cephra]

This would be a great idea! I'm at the same spot now looking for a way to assert that certain API calls have been made. Maybe there is another way to accomplish this.