add more unit test for history client

[shijiesheng]

What changed?

• Covered most of the branches in history client

Why?

To ensure correctness and bump coverage

How did you test it?

unit test

Potential risks

Release notes

Documentation Changes

[codecov]

Codecov Report

Merging #5883 (96dd681) into master (5a0a853) will increase coverage by 0.07%.
Report is 1 commits behind head on master.
The diff coverage is n/a.

Additional details and impacted files

Files	Coverage Δ
client/history/peer_resolver.go	100.00% <ø> (ø)

... and 6 files with indirect coverage changes

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[coveralls]

Pull Request Test Coverage Report for Build 018eb0f1-bfaa-4f35-adba-4e6a0db300dc

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 75 unchanged lines in 13 files lost coverage.
• Overall coverage increased (+0.009%) to 67.269%

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Files with Coverage Reduction	New Missed Lines	%
service/history/queue/timer_queue_processor_base.go	1	77.62%
common/task/weighted_round_robin_task_scheduler.go	2	89.05%
common/task/parallel_task_processor.go	2	93.06%
common/peerprovider/ringpopprovider/config.go	2	81.58%
common/task/fifo_task_scheduler.go	2	85.57%
common/persistence/sql/sqlplugin/mysql/task.go	2	73.68%
service/matching/taskListManager.go	2	79.7%
common/persistence/sql/sqlplugin/mysql/db.go	2	79.49%
service/history/task/transfer_active_task_executor.go	3	72.64%
service/history/task/fetcher.go	4	85.05%

Totals
Change from base Build 018eb0bc-a329-4f58-96b3-3c5a5f543f54:	0.009%
Covered Lines:	98199
Relevant Lines:	145979

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💛 - Coveralls