E2E test for cloudflare/pp- components

[thibmeu]

This repository is part of a 4 component architecture

• cloudflare/pp-origin,
• cloudflare/pp-browser-extension,
• cloudflare/pp-attester,
• cloudflare/pp-issuer,

The current testing method relies on a dev environment to be deployed.

It would be good to automate it, and share this testbed across repos to validate individual changes. A sample test procedure could be:

• clone and start pp-issuer: npm run dev -- --port 8787 && curl -X POST http:https://localhost:8787/admin/rotate
• clone and start pp-attester: npm run dev -- --port 8788 --var ISSUER_DIRECTORY_URL:"http:https://localhost:8787/.well-known/private-token-issuer-directory" --var ISSUER_REQUEST_URL:"http:https://localhost:8787/token-request"
• clone and start pp-origin npm run dev -- --port 8789 --var ISSUER_NAME:"localhost:8787" --var ORIGIN_NAME:"localhost:8789"
• clone and build pp-browser-extension npm run build
• Start a Selenium session (in node.js), load the extension, updates options to have http:https://localhost:8788 as an attester, query the origin http:https://localhost:8789 with Javascript enabled (for client replay), confirm the success page is loaded.

[thibmeu]

Worth checking how to integrate cloudflare/pp-config