Add unit tests for remaining methods in history handler

[timl3136]

What changed? Add unit tests for remaining methods in history handler

Why? Improve test coverage

How did you test it? Unit tests

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 66.70%. Comparing base (dbfb1c8) to head (7a45746). Report is 6 commits behind head on master.

:exclamation: Current head 7a45746 differs from pull request most recent head 8d18680. Consider uploading reports for the commit 8d18680 to get more accurate results

Additional details and impacted files

see 8 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update dbfb1c8...8d18680. Read the comment docs.

[coveralls]

Pull Request Test Coverage Report for Build 018f72cc-a7f2-4561-9352-a91052becccb

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 21 unchanged lines in 5 files lost coverage.
• Overall coverage increased (+0.07%) to 69.172%

---

Files with Coverage Reduction	New Missed Lines	%
common/task/weighted_round_robin_task_scheduler.go	2	89.05%
service/history/execution/mutable_state_util.go	2	78.52%
common/task/fifo_task_scheduler.go	4	85.57%
service/frontend/api/handler.go	4	62.26%
service/history/engine/engineimpl/poll_mutable_state.go	9	74.16%
<!--	Total:	21

Totals
Change from base Build 018f64a5-5902-4625-9851-849d5f6abde3:	0.07%
Covered Lines:	101624
Relevant Lines:	146915

---

💛 - Coveralls