Add report_url output for test report URLs

[Copilot]

Enables workflows to programmatically access test report URLs for linking in PR comments or cross-workflow coordination.

Changes

• New output report_url: Contains newline-separated URLs of all created test reports
• Implementation: Extracts URLs from existing CheckInfo objects populated during check creation
• Tests: Validates single URL, multiple URLs, and empty array cases

Usage

- uses: mikepenz/action-junit-report@v5
  id: test-report
  with:
    report_paths: '**/test-results/*.xml'

- name: Link to test report
  run: |
    echo "Results: ${{ steps.test-report.outputs.report_url }}"

For multiple reports, URLs are newline-separated and can be processed with standard shell tools.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Add test report URL(s) as job output</issue_title>
<issue_description>We have a complex CI setup that spawns several workflows and collects their statuses in a single comment on each PR. Each of these workflows has their own test report created from this action. In this comment, it would be nice to be able to add a link to each workflow's test report as they become available.

I see that there is already a summary output, but this only contains the table; the link to the test report is added separately when creating the annotation. I'd like to request that there be an additional output that provides the URLs of all the test reports (in our case, there's just one, but I see that there can potentially be many).</issue_description>

Comments on the Issue (you are @copilot in this section)

@mikepenz Thanks for the suggestion. I feel like that would be a great addition. This sounds like a great issue for a first contribution ✨

• Fixes Add test report URL(s) as job output #1455

---

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[github-actions]

	Tests	Passed ☑️	Skipped	Failed ❌️
Example Pytest Report	4 ran	2 passed	0 skipped	2 failed

Test	Result
Example Pytest Report
test_sample.test_which_succeeds	✅ passed
test_sample.test_which_fails	❌ failure
test_sample.test_with_error	❌ failure
test_sample.test_with_flaky_success	✅ passed

• View Example Pytest Report

[github-actions]

	Tests	Passed ☑️	Skipped ⚠️	Failed ❌️
Example Ungrouped Test Report | test_10.xml	3 ran	3 passed	0 skipped	0 failed
Example Ungrouped Test Report | test_11.xml	3 ran	2 passed	0 skipped	1 failed
Example Ungrouped Test Report | test_12.xml	3 ran	2 passed	1 skipped	0 failed

• View Example Ungrouped Test Report | test_10.xml
• View Example Ungrouped Test Report | test_11.xml
• View Example Ungrouped Test Report | test_12.xml

[github-actions]

	Tests	Passed ✅	Skipped	Failed
Example Nested JUnit Test Report	3 ran	3 passed	0 skipped	0 failed

Test	Result
Example Nested JUnit Test Report
ABC-0199: XMPP Ping
PingIntegrationTest.pingAsync (Normal)	✅ passed
PingIntegrationTest.pingServer (Normal)	✅ passed
ABC-0045: Multi-User Chat
MultiUserIntegrationTest.mucRoleTestForReceivingModerator (Normal)	✅ passed

[brettdh]

@mikepenz thanks for the quick turnaround on this as usual! It looks like this was a very simple update, but the tests that Copilot are a bit... lacking. 😁

[brettdh]

Seems like this is just testing that Array.join works?

[brettdh]

Again, this isn't testing the action; just the JavaScript stdlib.

[brettdh]

Same here.