[code-coverage] Add tests for mutable_state_util.go

[ketsiambaku]

What changed? Added tests to improve code coverage in service/history/execution/mutable_state_util_test.go

Why? Code Coverage Initiative 📈

How did you test it?

Potential risks

Release notes

Documentation Changes

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 68.10%. Comparing base (c6a145d) to head (d96623b).

:exclamation: Current head d96623b differs from pull request most recent head bb0c768

Please upload reports for the commit bb0c768 to get more accurate results.

Additional details and impacted files

[see 40 files with indirect coverage changes](https://app.codecov.io/gh/uber/cadence/pull/6062/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=uber) ------ [Continue to review full report in Codecov by Sentry](https://app.codecov.io/gh/uber/cadence/pull/6062?dropdown=coverage&src=pr&el=continue&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=uber). > **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=uber) > `Δ = absolute (impact)`, `ø = not affected`, `? = missing data` > Powered by [Codecov](https://app.codecov.io/gh/uber/cadence/pull/6062?dropdown=coverage&src=pr&el=footer&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=uber). Last update [c6a145d...bb0c768](https://app.codecov.io/gh/uber/cadence/pull/6062?dropdown=coverage&src=pr&el=lastupdated&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=uber). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=uber).

[coveralls]

Pull Request Test Coverage Report for Build 018fdb1f-40a9-4f14-ab60-448573a7c3cf

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 55 unchanged lines in 11 files lost coverage.
• Overall coverage increased (+0.03%) to 69.714%

---

Files with Coverage Reduction	New Missed Lines	%
common/task/weighted_round_robin_task_scheduler.go	2	89.05%
service/history/replication/task_processor.go	2	81.25%
service/matching/tasklist/matcher.go	2	89.35%
common/persistence/nosql/nosql_task_store.go	3	85.52%
service/matching/tasklist/task_list_manager.go	3	75.49%
common/archiver/filestore/historyArchiver.go	4	80.95%
common/task/fifo_task_scheduler.go	4	83.51%
service/frontend/api/handler.go	6	62.45%
service/history/task/transfer_standby_task_executor.go	7	85.92%
service/history/engine/engineimpl/poll_mutable_state.go	9	74.16%
<!--	Total:	55		-->

Totals
Change from base Build 018fd17e-a401-4eba-8372-591d1e581574:	0.03%
Covered Lines:	103128
Relevant Lines:	147930

---

💛 - Coveralls