[WIP] Deno_std Browser testing

[zekth]

as mentionned in: #333
Here is a draft of e2e testing in chrome headless browser using puppeteer.

First of all there is some additionnal step to setup the environment:

npm install puppeteer # This will provide the binary to use chrome Headless

In the ./strings/e2e/ folder there is 2 files:

• test.e2e.js : This is the description of the test using puppeteer
• test.html : File to be served througth the http server to test the module

How the test is done:

• start http/file_server.ts
• node ./strings/e2e/test.e2e.js
• stop http/file_server.ts

If the test pass the console prompt OK, otherwise FAILED. And we inspect the output.

Also i'd prefer to use the same asserts as the tests itselves and use a more generic way to implement Browser testing. Any idea is welcome.

Added to this, once denoland/deno#2089 will land it will be easier to wrap everything in a more generic approach.

NOTE: Atm it's using the default chrome path. There is some differences between environment, got to fix it.