Added unit tests for Delete current and workflow execution, list all …

[agautam478]

…current workflows

What changed?

• Added tests for the following functions:
  DeleteWorkflowExecution, DeleteCurrentWorkflowExecution, and ListCurrentExecutions.

Each function contains one success and one failure case.

Why?
To increase code coverage

How did you test it?
unit test

Potential risks

Release notes

Documentation Changes

[coveralls]

Pull Request Test Coverage Report for Build 018e159a-431e-47be-b9e4-2431a3660106

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 128 unchanged lines in 15 files lost coverage.
• Overall coverage decreased (-0.03%) to 63.758%

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Files with Coverage Reduction	New Missed Lines	%
common/persistence/executionManager.go	2	78.59%
common/persistence/sql/sqlplugin/mysql/db.go	2	79.49%
common/persistence/sql/sqlplugin/mysql/task.go	2	73.68%
common/task/weighted_round_robin_task_scheduler.go	2	89.05%
service/history/execution/mutable_state_util.go	2	78.48%
service/history/task/transfer_standby_task_executor.go	4	86.6%
common/persistence/statsComputer.go	5	94.64%
service/history/task/fetcher.go	5	85.57%
common/persistence/nosql/nosqlplugin/cassandra/workflow.go	6	63.03%
service/history/task/cross_cluster_task_processor.go	8	80.79%

Totals
Change from base Build 018e157c-5c3f-4318-8ae8-5977fc7f38b7:	-0.03%
Covered Lines:	93468
Relevant Lines:	146599

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💛 - Coveralls