WebDriver extension for Custom Handlers

[javifernandez]

The HTML spec states in the Custom Handler section that user agents may launch a prompt dialog during the registration of a custom protocol handler:

A user agent could, for instance, prompt the user and offer the user the opportunity to add the site to a shortlist of handlers, or make the handlers their default, or cancel the request. User agents could also silently collect the information, providing it only when relevant to the user.

Currently, there are only manual tests for the registerProtocolHandler method:

https://github.com/web-platform-tests/wpt/blob/master/html/webappapis/system-state-and-capabilities/the-navigator-object/protocol-handler-fragment-nosw-manual.https.html

The main problem is that Chrome, and also Firefox, launch a prompt dialog to ask the user for confirmation to register the protocol handler.

We could provide testing automation if we had a WebDriver extension command that would autogrant or autoreject the registration request.

We could get some inspiration from the Set SPC Transaction Mode extension command, which is already implemented in ChromeDriver (Not sure about Marionette, though).

[domenic]

I'm pretty confused by why you're filing this issue on the HTML Standard. The HTML Standard does not define WebDriver commands; I assume that's something the WebDriver spec does?

[javifernandez]

I'm pretty confused by why you're filing this issue on the HTML Standard. The HTML Standard does not define WebDriver commands; I assume that's something the WebDriver spec does?

My idea would be to add a new subsection in the Custom Handlers section of the HTML Standard spec, as it's done in other specs, like Permission, Secure Payment Confirmation.

As far as I understand, extension commands are usually defined in the features' spec where they are needed.

[domenic]

Oh, fascinating. Sure, if this is something that implementers are interested in, then I guess it sounds like HTML is the right place for it...