fix(linter): improve jest/no_export heuristic

[lilnasy]

• Closes linter: jest/no-export doesn't do what it says it does #14592
• The diagnostic was reported for typescript-make-units-from-test.ts because jest/no_export checks if the file name ends with test.ts, not if it ends with .test.ts.
• A quick fix would be to change the file name criteria, but checking for a test brings the rule closer to eslint-plugin-jest behavior.
• Direct edits from maintainers welcome.

Before

After

The oxlint-disable-next directive was removed for these screenshots.

[graphite-app]

How to use the Graphite Merge Queue

Add either label to this PR to merge it via the merge queue:

• 0-merge - adds this PR to the back of the merge queue
• hotfix - for urgent hot fixes, skip the queue and merge this PR next

You must have a Graphite account in order to use the merge queue. Sign up using this link.

An organization admin has enabled the Graphite Merge Queue in this repository.

Please do not merge from GitHub as this will restart CI on PRs being processed by the merge queue.

[Copilot]

Pull Request Overview

This PR improves the jest/no_export linter rule by adding a heuristic to only flag exports when the file contains actual test function calls (it, test, etc.), rather than flagging all exports in any file with a test-like filename.

• Enhanced export detection logic to check for presence of test functions before flagging exports
• Added utility imports for Jest function parsing and AST traversal
• Updated test cases to reflect the improved heuristic behavior

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[codspeed-hq]

CodSpeed Performance Report

Merging #14620 will not alter performance

_{Comparing lilnasy:fix/14592 (26f0466) with main (544c092)¹}

Summary

✅ 4 untouched
⏩ 33 skipped²

Footnotes

1. No successful run was found on main (f5b3445) during the generation of this report, so 544c092 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

2. 33 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[camc314]

Thank you! i pushed one commit changing collect_possible_jest_call_node to avoid the iter -> vec -> iter chain