[UnitaryHack] Mock provider, backend

[WingCode]

Summary

Mocks backend, provider, job

Details and comments

closes #19

[WingCode]

@JordanAWS Would could you give me some pointers to look upon for the failing test for test_real_device_circuit_execution ?
This test-case was previously not being run in CI because the backend, provider wasn't yet mocked and unittest.skip was being applied. After mocking the backend, random_circuit transpilation is failing.

[WingCode]

After some digging through, I think this test case failure might be related to this issue #91 since the gates are not supported?

[kshitijc]

@WingCode could you try replacing that with a deterministic circuit instead which has supported gates?

[kshitijc]

Thanks for the updates @WingCode! The issue also calls for adding tests for the backend and job classes.

The coverage for these currently appears to be:

tests/providers/test_adapter.py .... [ 19%]
tests/providers/test_braket_backend.py .....s.sss.. [ 76%]
tests/providers/test_braket_job.py .. [ 85%]

Would you like to add the tests for backend and job in this PR?

[WingCode]

@kshitijc Thank you for the review. Yes, I can add tests for lines not covered in braket_job.py, braket_backend.py in this PR

[WingCode]

@kshitijc Kindly let me know if you like some changes in this PR to get it merged :)

[WingCode]

This is how the current coverage looks like :)

[kshitijc]

Nice work @WingCode! Thanks for the improved coverage! 👍