Write tests for shard context

[taylanisikdemir]

What changed?
Wrote tests for some part of history/shard/context.go

Why?
Improve coverage

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 42 lines in your changes missing coverage. Please review.

Project coverage is 68.81%. Comparing base (ab0d875) to head (bd5eca7).

❗ Current head bd5eca7 differs from pull request most recent head ad3e37a

Please upload reports for the commit ad3e37a to get more accurate results.

Additional details and impacted files

Files	Coverage Δ
service/history/shard/test_context.go	0.00% <0.00%> (ø)

... and 7 files with indirect coverage changes

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[coveralls]

Pull Request Test Coverage Report for Build 018fe4bc-3b62-4bdb-b2eb-3f37bf730fab

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 46 unchanged lines in 12 files lost coverage.
• Overall coverage increased (+0.02%) to 70.215%

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Files with Coverage Reduction	New Missed Lines	%
common/task/weighted_round_robin_task_scheduler.go	2	88.56%
service/matching/tasklist/db.go	2	73.23%
common/task/fifo_task_scheduler.go	2	80.41%
common/membership/hashring.go	2	84.69%
common/persistence/historyManager.go	2	66.67%
common/log/tag/tags.go	3	50.46%
common/persistence/nosql/nosql_task_store.go	3	85.52%
common/types/history.go	4	45.35%
service/history/engine/engineimpl/record_activity_task_started.go	4	68.87%
service/frontend/api/handler.go	4	65.45%

Totals
Change from base Build 018fe451-cd64-44f5-8cb8-8b9c6b71f4ba:	0.02%
Covered Lines:	104585
Relevant Lines:	148950

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💛 - Coveralls