Write tests for cassandra/domain.go

[taylanisikdemir]

What changed?
Adding tests for cassandra/domain.go. There will be a follow up PR for remaining functions.

Why?
Improve coverage

[codecov]

Codecov Report

Merging #5856 (a7dc5fc) into master (4957d34) will decrease coverage by 0.03%.
The diff coverage is 100.00%.

❗ Current head a7dc5fc differs from pull request most recent head 73efa4c. Consider uploading reports for the commit 73efa4c to get more accurate results

Additional details and impacted files

Files	Coverage Δ
.../persistence/nosql/nosqlplugin/cassandra/domain.go	38.00% <100.00%> (+38.00%)	⬆️

... and 9 files with indirect coverage changes

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[coveralls]

Pull Request Test Coverage Report for Build 018ea6bd-ed85-4530-b0b0-164da54f27a3

Details

• 7 of 7 (100.0%) changed or added relevant lines in 1 file are covered.
• 53 unchanged lines in 11 files lost coverage.
• Overall coverage increased (+0.03%) to 66.173%

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Files with Coverage Reduction	New Missed Lines	%
service/matching/taskReader.go	2	84.88%
common/peerprovider/ringpopprovider/config.go	2	81.58%
service/matching/taskListManager.go	2	80.2%
common/membership/hashring.go	2	82.23%
service/history/task/fetcher.go	2	85.57%
common/persistence/historyManager.go	2	66.67%
service/history/queue/timer_queue_processor_base.go	3	77.82%
common/task/fifo_task_scheduler.go	4	80.41%
service/history/task/transfer_standby_task_executor.go	6	86.6%
service/history/task/cross_cluster_task_processor.go	8	80.79%

Totals
Change from base Build 018ea677-2189-462a-8281-b7114ce8049a:	0.03%
Covered Lines:	96836
Relevant Lines:	146337

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💛 - Coveralls