How do you automatically close parent issue once all test case is passed?

[Reanal]

Hello Everyone,

How do you automatically close parent issue once all test case is passed? What I have tried are the URL I have found for automatic transition on parent issue when all sub-tasks are closed and Transition parent to close when sub-tasks are closed (is not working the way it should) but those are more related to subtask. I believe since test cases are used it would be define as 'linked issues' but I am unable to customize my workflow to fit my needs. Any help is appreciate it!

[Bob Swift OSS (Bob Swift Atlassian Apps)]

You can use a Update issues post function from Update on Transition for JIRA. The update would be to transition the parent to closed. You would add a condition so that it would only be done if the results of a JQL query  returned 0 issues (%jql_result_count%). Construct the JQL to find all the related testcase issues.