BUG: Missing Scheme specific Unit Test for Interface Methods Scheme Implementation and Scheme Handler

[yogeshbdeshpande]

As part of CoRIM Store Integration work undertaken via PR #383

The Scheme Interfaces were re-organized. However during this work, important Scheme Specific Unit Tests were Not ported. leaving a big hole, in unit testing.

For Example, taking one simple example of Scheme arm-cca Unit tests for:
ValidateEvidenceIntegrity()
AppraiseClaims()
GetTrustAnchorIDs()
etc...

are omitted.

These needs to be re-instated, as these tests are valuable to:

1. Understand the structure of Evidence Claims from Unit tests
2. Check Sanity when some logic is modified subsequently to initial implementation.