[Workflows/vitest-pool-workers] Add a test handler to get the result of a workflow instance

[pombosilva]

Fixes WOR-1059.

Introduces two new test handlers to workflow instances in vitest-pool-workers:

• getOuput(): retrieves the output of a successful instance
• getError(): retrieves the error info of a failed instance

I decided to introduce these as two separate functions rather than having one single function like getResult so tests end up more readable, and to not confuse between outputs that might have the same error structure ({name: string, message: string})

These are intended to be used after the workflow instance has reached either a complete or errored state, thus should be called after a waitForStatus({status: <status>}).

---

• Tests
  • Tests included/updated: fixtures updated to use it
  • Tests not necessary because:
• Public documentation
  • Cloudflare docs PR(s): [Workers/vitest-pool-workers] Add new test handlers to Workflows cloudflare-docs#27158
  • Documentation not necessary because:
• Wrangler V3 Backport
  • Wrangler PR:
  • Not necessary because: Workflows were not GA in v3

A picture of a cute animal (not mandatory, but encouraged)
Meet Kiara, my cousin's dog. She loves to snore.

[changeset-bot]

🦋 Changeset detected

Latest commit: a5dd99d

The changes in this PR will be included in the next version bump.

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[pkg-pr-new]

create-cloudflare

npm i https://pkg.pr.new/create-cloudflare@11648

@cloudflare/kv-asset-handler

npm i https://pkg.pr.new/@cloudflare/kv-asset-handler@11648

miniflare

npm i https://pkg.pr.new/miniflare@11648

@cloudflare/pages-shared

npm i https://pkg.pr.new/@cloudflare/pages-shared@11648

@cloudflare/unenv-preset

npm i https://pkg.pr.new/@cloudflare/unenv-preset@11648

@cloudflare/vite-plugin

npm i https://pkg.pr.new/@cloudflare/vite-plugin@11648

@cloudflare/vitest-pool-workers

npm i https://pkg.pr.new/@cloudflare/vitest-pool-workers@11648

@cloudflare/workers-editor-shared

npm i https://pkg.pr.new/@cloudflare/workers-editor-shared@11648

@cloudflare/workers-utils

npm i https://pkg.pr.new/@cloudflare/workers-utils@11648

wrangler

npm i https://pkg.pr.new/wrangler@11648

commit: a5dd99d

[claude]

Claude finished @pombosilva's task —— View job

---

Changeset Review

Reviewing changeset files...

• Read changeset guidelines
• Review .changeset/wicked-cities-attend.md
• Validate version type, changelog quality, and markdown headers
• Check out the cute dog

---

✅ All changesets look good

The changeset follows all guidelines:

• ✅ Version Type: Correctly uses minor for all three packages (new feature: getOutput() and getError() methods)
• ✅ Changelog Quality: Clear title and body with practical code examples showing how to use the new handlers
• ✅ Markdown Headers: No h1/h2/h3 headers used (only regular text and code blocks)

---

Cuteness Report: This is Kiara. She's living her best life on the grass doing a full-body smile with her tongue out. Absolute queen of relaxation. Champion snorer according to reports. 14/10 would give all the pets.

[edmundhung]

Looks good to me overall. But please get a review from your team too (Update: I missed the reivew above 😅 ) :)