Add tests for stateManagerCtx

[KentHsu]

Description

This PR add tests for stateManagerCtx mockgen a mock_client file so stateManagerCtx can run tests with this mock client Added tests for methods in stateManagerCtx and fixed a bug in setWithTTL method

Issue reference

Please reference the issue this PR will close: #446

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• [X] Code compiles correctly
• [X] Created/updated tests
• [ ] Extended the documentation

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 4.77137% with 479 lines in your changes are missing coverage. Please review.

Project coverage is 55.92%. Comparing base (27248ba) to head (be6e8ce). Report is 10 commits behind head on main.

:exclamation: Current head be6e8ce differs from pull request most recent head 40c60b0. Consider uploading reports for the commit 40c60b0 to get more accurate results

Files	Patch %	Lines
actor/mock_client/mock_client.go	4.65%	471 Missing :warning:
actor/mock/mock_server.go	0.00%	8 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #558 +/- ## ========================================== - Coverage 58.04% 55.92% -2.13% ========================================== Files 55 56 +1 Lines 3568 4070 +502 ========================================== + Hits 2071 2276 +205 - Misses 1375 1665 +290 - Partials 122 129 +7 ```

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[KentHsu]

Thank you for the feedback. I have updated this PR with

• Added tests for stateManager methods. These tests are duplicates of stateManagerCtx tests.
• Added a new target in Makefile to generate mocks and updated mocks. I'm using golang mock because this is how those mock were generated. mock_factory_impl.go is not created by mockgen so it's not in the Makefile. mock_server.go is updated but I didn't put it in the Makefile because it was manually edited.
• Put mocks in .codecov.yaml ignore. Let me know if this is okay. I'll revert it if it's inappropriate.

[mikeee]

Just had another skim-read, looking great so far. I haven't forgotten and will pick the review up tomorrow when I get a moment 👌

[KentHsu]

Sure. Please take your time 👍 BTW, I realize that I do need another PR to update .codecov.yaml... I'll submit another PR to update it when this one is ready.

[mikeee]

Is there any reason against using Uber's maintained fork to generate mock interfaces?

[KentHsu]

I tried both and I didn't see anything blocking us from using Uber's fork. If we want to switch to Uber's fork, I'll have to update go.mod and other test files using these mocks since Uber's fork doesn't work with those original mocks. Is that okay?

[KentHsu]

I went ahead to make some commits to use Uber's gomock fork and revert the change in .codecov.yaml. Please let me know if there's any concern. Thanks.

[KentHsu]

Hi @mikeee, would you like me to create another PR to exclude the mock files so that this PR won't be block by code coverage? Any suggestions on the code change in this PR?