Add tests for RequestCancelWorkflowExecution in service/frontend/api/handler.go

[fimanishi]

Add tests for RequestCancelWorkflowExecution in service/frontend/api/handler.go

What changed?
tests for RequestCancelWorkflowExecution in service/frontend/api/handler.go

Why?
improve unit test coverage

How did you test it?
unit tests

Potential risks

Release notes

Documentation Changes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.53%. Comparing base (f0f7efd) to head (ecea749).
Report is 7 commits behind head on master.

Additional details and impacted files

see 9 files with indirect coverage changes

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[coveralls]

Pull Request Test Coverage Report for Build 018fe06a-bbb0-4e5a-b0a6-3987fbe463a9

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 172 unchanged lines in 16 files lost coverage.
• Overall coverage decreased (-0.1%) to 69.687%

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Files with Coverage Reduction	New Missed Lines	%
common/task/weighted_round_robin_task_scheduler.go	1	89.05%
service/history/shard/context.go	2	68.99%
service/matching/tasklist/db.go	2	73.23%
service/matching/tasklist/task_list_manager.go	2	76.48%
common/persistence/sql/sqlplugin/mysql/task.go	2	73.68%
service/history/task/transfer_active_task_executor.go	2	72.79%
common/util.go	2	91.78%
common/persistence/sql/sqlplugin/mysql/db.go	2	79.49%
common/log/tag/tags.go	3	50.46%
service/history/handler/handler.go	3	96.2%

Totals
Change from base Build 018fe051-df14-4702-b515-0388c6db07f3:	-0.1%
Covered Lines:	103092
Relevant Lines:	147936

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💛 - Coveralls