MAHOUT-604: Add test for single qubit gates

[rich7420]

Purpose of PR

This PR is first part of test_single_qubit_gates.py.
This file is split into 3 cumulative PRs including those tests:

TestPauliXGate
TestPauliYGate
TestPauliZGate
TestPauliZGate.test_pauli_z_with_hadamard
TestHadamardGate
TestNOTGate
TestUGate
TestSingleQubitGatesEdgeCases
TestSingleQubitGatesConsistency

This PR is about tests of them: TestPauliXGate , TestPauliYGate and TestPauliZGate.

You can test this PR locally with command:

pytest testing/test_single_qubit_gates.py

Related Issues or PRs

#604

Changes Made

• Bug fix
• New feature
• Refactoring
• Documentation
• Test
• CI/CD pipeline
• Other

Breaking Changes

• Yes
• No

Checklist

• Added or updated unit tests for all changes
• Added or updated documentation for all changes
• Successfully built and ran all unit tests or manual tests locally
• PR title follows "MAHOUT-XXX: Brief Description" format (if related to an issue)
• Code follows ASF guidelines

[rich7420]

@robinanil Nice to meet you! Could I join the community?

[guan404ming]

cc @rawkintrevo

[guan404ming]

I’ll review this one tomorrow, thanks for your contribution!

[rich7420]

@guan404ming thanks!

[guan404ming]

Thanks for the contribution, overall looks good.

I think we could paramatized our tests instead of hard-coded test one case. To using paramatized could make our tests more flexiable to include new test cases in the future.

[rich7420]

@guan404ming Ok, I'll try to modify it as soon as possible.

[rich7420]

@guan404ming I've tried to make changes.

[guan404ming]

Thanks!

[rich7420]

@guan404ming thanks!