alisha-1000 opened a new pull request, #1082:
URL: https://github.com/apache/mahout/pull/1082
### Related Issues
Closes #1058
### Changes
- [x] Test
### Why
The current coverage for `qumat/amazon_braket_backend.py` was around ~90%.
This PR improves coverage to 99% by adding unit tests for previously
uncovered branches.
Improving coverage in backend modules increases reliability and ensures
correct handling of edge cases such as AWS session initialization and
parameter filtering.
### How
Added unit tests covering:
- Backend initialization:
- Local simulator
- Default simulator
- Unsupported simulator type fallback
- Region-based AWS session creation
- Gate helper wrappers (RX/RY/RZ/U and other single-qubit/multi-qubit gates)
- `execute_circuit`:
- With parameters
- Without parameters
- Parameter filtering logic
- `get_final_state_vector`:
- With parameters
- Without parameters
- Ensured state_vector() path is exercised
- `calculate_prob_zero` edge cases
Coverage impact:
- `amazon_braket_backend.py`: ~90% → 99%
## Checklist
- [x] Added or updated unit tests for all changes
- [ ] Added or updated documentation for all changes
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