🧪 Review and enhance revocation tests

[wdbasson]

Replicate demo test case: https://aca-py.org/main/demo/#revocation

[ff137]

Currently we can create credential definitions that support revocation, and the issuer can call /revoke-credential after a credential has been issued. This is asserted in the tests.

One enhancement would be to assert the behavior during a proof request, after a cred has been revoked.
And other things, like asserting that a non-revocable credential should error when attempted to revoke ...

[ff137]

Apart from credentials, there's some revocation registry behavior that is only mocked, but not e2e tested.

Here's a summary of RevocationAPI functions, and whether it's covered or not:
✅ used and covered by tests:

• create_registry
• get_active_registry_for_cred_def
• publish_rev_reg_def and publish_rev_reg_entry
• revoke_credential
• set_registry_state (we only ever set to 'active', upon creation)

❌ Unused methods:

• clear_pending_revocations
• download_tails_file
• get_created_registries
• get_registry (by rev reg id)
• get_registry_issued_credentials_count (by rev reg id)
• get_revocation_status (by cred_ex_id, or cred_rev_id, or rev_reg_id)
• publish_revocations (bulk revocations)
• revocation_active_registry_cred_def_id_rotate_post (rotate revocation registry, by cred_def_id)
• revocation_registry_delete_tails_file_delete (delete tails files)
• revocation_registry_rev_reg_id_fix_revocation_entry_state_put (Fix revocation state in wallet)
• revocation_registry_rev_reg_id_issued_details_get (Get details of credentials issued against revocation registry)
• revocation_registry_rev_reg_id_issued_indy_recs_get (Get details of revoked credentials from ledger)
• update_registry (Update revocation registry with new public URI to its tails file)
• upload_tails_file (Upload local tails file to server)

So, there you have it! Revocation is fairly complex and we should work towards implementing more of those unused methods in order to support it properly.

edit: added checkboxes for the methods that have since been implemented