Re: Testing parse-html

Michael,
Not a real answer but could cover half of the needs.

The test suite has a set of test samples and results to compare against.
The second can be achieved by feeding the input string to actual DOM engine
(Chromium/Blink) and comparing your own parser results with the actual
browser DOM. Going further, by utilizing *cross-browser testing*
capabilities like
from @web/test-runner-playwright, you would have a *parser browser
compatibility matrix*.

While the approach is not a test against "ideal" standards, it is more
valuable in the web development world as shows the cross-browser support, a
criteria to accept any JS library. The browsers themselves are not
following W3C test suites anymore:
> Blink does not currently (4/2013) regularly import and run the W3C's tests
<https://www.chromium.org/blink/blink-testing-and-the-w3c/#ideal-state>

As for the 1st half of the question on the parser test set, the
Chromium(Blink) or FF sources have the parser tests in the sources.
Extraction of those is a bit of a challenge though.
Blink sources are in chromium repo
<https://github.com/chromium/chromium/blob/main/third_party/blink/renderer/core/html/parser>.
Do not use `git clone` as it is 30+Gb, get the latest instead:

https://github.com/chromium/chromium/archive/refs/heads/main.zip

-s

PS I have used such approach for testing of TEMPLATE
<https://github.com/chromium/chromium/blob/main/third_party/blink/web_tests/external/wpt/shadow-dom/slots.html#L8>
tag shadowDOM simulation in css-chain
<https://github.com/sashafirsov/css-chain-test/blob/main/src/slots-light-vs-shadow.html>
and light-dom-element tests.

On Wed, Dec 21, 2022 at 4:06 PM Michael Kay <mike@saxonica.com> wrote:

> I've just been running a few new tests on our existing parse-html()
> function on SaxonJ (built on TagSoup) and SaxonCS (built on
> HtmlAgilityPack) and reallising how different they are. I suspect that
> getting a good level of interoperability (and tests to prove it) for
> fn:parse-html is going to be challenging!
>
> Is there an HTML5 test suite we can build on?
>
> Michael Kay
> Saxonica
>