Howardisme opened a new pull request, #1112:
URL: https://github.com/apache/mahout/pull/1112
### Related Issues
Related to #1058
### Changes
- [ ] Bug fix
- [ ] New feature
- [ ] Refactoring
- [ ] Documentation
- [x] Test
- [ ] CI/CD pipeline
- [ ] Other
### Why
This PR improves the test coverage for the `qiskit_backend.py` module by
addressing few previously untested code paths.
and also improves some test coverage for all backends(cirq_backend.py,
amazon_braket_backend.py).
### How
Add unit tests covering:
* Backend Initialization (add test_qiskit_custom_simulator_fallback):
* Triggered the else block of initialize_backend using a mock setup
("simulator_type": "matrix_product_state"). Evaluates the correct propagation
of the configuration parameter through to the underlying AerSimulator.
* Circuit Visualization (add test_draw_circuit_returns_output):
* Validated the rendering function (draw_circuit) in multiple backend
configurations by creating class TestCircuitDrawing. Testing all backends as
well.
* Swap Operation (add test_apply_swap_gate):
* Tested the swap gate function (apply_swap_gate) by initiating state
(|10⟩ by a Pauli-X), executing apply_swap_gate, and then checked the operation
returned successfully in qumat execution contexts. Testing all backends as well.
Coverage Improve:
* qiskit_backend.py: 95% → 99%
* amazon_braket_backend.py: 99% → 100%
* cirq_backend.py: 93% → 97%
* qumat.py: 92% → 97%
## Checklist
- [x] Added or updated unit tests for all changes
- [ ] Added or updated documentation for all changes
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