WIP: Add many URL tests to form-validation-checkValidity.html

[sideshowbarker]

Don’t merge this. Just pushing it here for now for others to test with.

[annevk]

It would be good to have an HTML issue to discuss this. I suspect what we want is that implementations only have to run the URL parser and when that returns failure only then is there a problem. So they don't actually "validate" the URL in order to determine input validity. And then separately we need to figure out what gets submitted and what value ends up returning.

[sideshowbarker]

It would be good to have an HTML issue to discuss this.

Raised whatwg/html#11083

I suspect what we want is that implementations only have to run the URL parser and when that returns failure only then is there a problem.

Right. That seems to me to be the case — based on having taken the tests added in this PR and run them in Safari and Chrome and Firefox.

So they don't actually "validate" the URL in order to determine input validity.

Right