[code-coverage] Add tests for HandleDecisionTaskFailed in service/history/decision

[ketsiambaku]

What changed?

• Change tests name to address comments on [code-coverage] Add tests for HandleDecisionTaskScheduled API in service/history/decision #5901
• Add unit tests for HandleDecisionTaskFailed

Why?
improve code coverage

How did you test it?
Unit tests

Potential risks
N/A

Release notes

Documentation Changes

[coveralls]

Pull Request Test Coverage Report for Build 018eceb7-c380-4431-9dc8-04ab8226b030

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 15 unchanged lines in 7 files lost coverage.
• Overall coverage increased (+0.02%) to 67.375%

---

Files with Coverage Reduction	New Missed Lines	%
common/task/weighted_round_robin_task_scheduler.go	1	89.05%
service/history/queue/timer_queue_processor_base.go	1	78.23%
common/peerprovider/ringpopprovider/config.go	2	81.58%
common/task/fifo_task_scheduler.go	2	87.63%
common/persistence/sql/sqlplugin/mysql/task.go	2	73.68%
common/persistence/sql/sqlplugin/mysql/db.go	2	79.49%
tools/cli/admin_db_decode_thrift.go	5	66.67%

Totals
Change from base Build 018eca11-8174-48a3-9058-79ba823db2e5:	0.02%
Covered Lines:	98217
Relevant Lines:	145776

---

💛 - Coveralls

[codecov]

Codecov Report

Merging #5903 (2262a20) into master (7b4b90e) will increase coverage by 0.02%.
The diff coverage is n/a.

Additional details and impacted files

see 9 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7b4b90e...2262a20. Read the comment docs.