Write tests for cassandra/shard.go

[taylanisikdemir]

What changed?
Added tests for cassandra/shard.go

Why?
Improve coverage

[codecov]

Codecov Report

Merging #5839 (e088ec2) into master (13256e6) will increase coverage by 0.16%.
Report is 1 commits behind head on master.
The diff coverage is 100.00%.

❗ Current head e088ec2 differs from pull request most recent head fa851cc. Consider uploading reports for the commit fa851cc to get more accurate results

Additional details and impacted files

Files	Coverage Δ
...n/persistence/nosql/nosqlplugin/cassandra/shard.go	100.00% <100.00%> (+100.00%)	⬆️

... and 8 files with indirect coverage changes

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[coveralls]

Pull Request Test Coverage Report for Build 018ea072-11ff-4c07-aa28-1ba6a7975c95

Details

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• 68 unchanged lines in 7 files lost coverage.
• Overall coverage increased (+0.04%) to 65.57%

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Files with Coverage Reduction	New Missed Lines	%
common/task/parallel_task_processor.go	2	93.06%
common/task/fifo_task_scheduler.go	2	84.54%
service/history/task/transfer_standby_task_executor.go	4	86.19%
service/history/task/fetcher.go	4	86.08%
common/persistence/nosql/nosqlplugin/cassandra/workflow_parsing_utils.go	12	85.54%
service/history/task/task_util.go	20	70.57%
service/history/execution/mutable_state_task_refresher.go	24	61.08%

Totals
Change from base Build 018ea067-c196-4b9b-885f-9cc9c710a39f:	0.04%
Covered Lines:	95955
Relevant Lines:	146339

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💛 - Coveralls