Add end-to-end tests to CI about sxg-rs HOT 3 OPEN

As an interim solution, maybe some almost e2e tests, like a CLI SXG generator and a shell script that pipes it to dump-signedexchange -verify.

Plus wrangler build and the fastly_compute equivalent.

from sxg-rs.

I'm thinking at a minimum the test plan should be a matrix of:

Accept header:

• prefers SXG
• doesn't prefer SXG

Response:

• small (<8MB) HTML
• small HTML + <meta charset=utf-8>
• small HTML + <meta charset=utf-8> + UTF-16 encoding with BOM
• large (>8MB) HTML + <meta charset=utf-8>
• small non-HTML
• large non-HTML

from sxg-rs.

Another possible alternative to wrangler dev is Cloudflare's Miniflare which is a local Workers emulator.

from sxg-rs.