test: add checks of uploads of very large number of Pages assets

[petebacondarwin]

What this PR solves / how to test

Adds a test to avoid accidentally breaking Pages uploads for large numbers of assets.

This test would have failed after the #5632 change.

Author has addressed the following

• Tests
  • TODO (before merge)
  • Included
  • Not necessary because:
• E2E Tests CI Job required? (Use "e2e" label or ask maintainer to run separately)
  • I don't know
  • Required / Maybe required
  • Not required because: just a new non-e2e test added
• Changeset (Changeset guidelines)
  • TODO (before merge)
  • Included
  • Not necessary because: just adding a test
• Public documentation
  • TODO (before merge)
  • Cloudflare docs PR(s):
  • Not necessary because: just adding a test

[changeset-bot]

⚠️ No Changeset found

Latest commit: ea441c2

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[github-actions]

A wrangler prerelease is available for testing. You can install this latest build in your project with:

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9484220166/npm-package-wrangler-6010

You can reference the automatically updated head of this PR with:

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/prs/6010/npm-package-wrangler-6010

Or you can use npx with this latest build directly:

npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9484220166/npm-package-wrangler-6010 dev path/to/script.js

Additional artifacts:

npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9484220166/npm-package-create-cloudflare-6010 --no-auto-update

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9484220166/npm-package-cloudflare-kv-asset-handler-6010

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9484220166/npm-package-miniflare-6010

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9484220166/npm-package-cloudflare-pages-shared-6010

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9484220166/npm-package-cloudflare-vitest-pool-workers-6010

Note that these links will no longer work once the GitHub Actions artifact expires.

---

[email protected] includes the following runtime dependencies:

Package	Constraint	Resolved
miniflare	workspace:*	3.20240605.0
workerd	1.20240605.0	1.20240605.0
workerd --version	1.20240605.0	2024-06-05

Please ensure constraints are pinned, and miniflare/workerd minor versions match.

[holopin-bot]

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[GregBrimble]

Now we have the bot installed, I'm just testing Holopin really quickly here, sorry! Don't mind me!

[CarmenPopoviciu]

how many times do we expect this endpoint to be called? should we assert that as well?

[petebacondarwin]

There are other tests that check how the bucketing works and exactly what requests are made.
This test is purely looking at whether the correct number of assets arrive at the server or not.