Product attributes do not update visually when switching variations

Hi,
I've implemented the fix in ProductVariationAttributesWidget. During an AJAX refresh, if the selected radio button from user input doesn't exist in the newly rebuilt #options, we just select the first radio button as fallback.
Please review and confirm.

While the patch in #14 makes some sense to me, I read

Turns out that there was a second add to cart form on the same page (visually hidden) and this is causing the issue.

in #13 and there has been no other activity here since 2021. So I'm unsure if this issue still exists.

If someone runs into this, could you please update the issue summary with clear steps to reproduce and eventually provide some screenshots to better understand how this can be reproduced and what this is caused by?

@anybody: aye, this issue still existed for @vipin.j and I because we ran into it during our own QA of our platform.

ivnish → closed merge request !343

ivnish → changed the visibility of the branch 3107602-product-attributes-do to hidden.

Patch #14 works fine. I added it to MR as is

All tests passed. Needs review by commerce maintainers

ivnish → closed merge request !344

Yeah, now I can reproduce this and can write tests

I added the test. Without the patch test fails

Left some comments on the MR ~~ leave this one in review state for further review

Setting this as needs work... We already have tests coverage for attributes, and the tests are under the commerce_cart module. We don't need a new one under commerce_product.

Could you perhaps expand AddToCartMultiAttributeTest.php?

Yes. I think I missed this test when looked for existing attributes test

Thank you! Merged.