Report tag_name as ShadowRoot for shadow roots

[myabc]

What

Reports tag_name as "ShadowRoot" for shadow-root nodes, un-skipping the Capybara #shadow_root should produce error messages when failing shared spec.

Why

Node#tag_name derived from description["nodeName"], which for a shadow root is #document-fragment. So failure messages scoped to a shadow root read tag="#document-fragment", whereas Capybara (and Selenium) expect tag="ShadowRoot".

How

tag_name now returns "ShadowRoot" when the node's CDP description carries shadowRootType (present only on shadow roots); everything else is unchanged. Other tag_name comparisons in the driver are against lowercased HTML tags, which a shadow root never matched anyway.

The repo's own Node#shadow_root spec previously asserted the old tag="#document-fragment" output; it's updated to the corrected tag="ShadowRoot".

Testing

• The previously-skipped shared spec now passes.
• All shadow-DOM specs green (11 examples: shared + Cuprite's own), plus a node regression pass (#tag_name, #[], #value, #path).
• bundle exec rubocop clean.

Part of #307.

_{🤖 Authored with agent assistance.}

[Copilot]

Pull request overview

This PR aligns Cuprite’s Node#tag_name behavior for ShadowRoot nodes with Capybara/Selenium expectations by reporting tag_name as "ShadowRoot" (instead of #document-fragment), which improves Capybara failure messages and allows previously skipped shadow-root shared specs to run.

Changes:

• Update Capybara::Cuprite::Node#tag_name to return "ShadowRoot" when the CDP node description includes shadowRootType.
• Unskip the Capybara shared spec related to shadow-root failure messages.
• Update Cuprite’s own shadow-root error message expectation to match the new tag value.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
spec/spec_helper.rb	Removes the skip entry so the shadow-root shared spec now runs.
spec/features/session_spec.rb	Updates the expected failure message to match tag="ShadowRoot".
lib/capybara/cuprite/node.rb	Special-cases tag_name for shadow-root nodes using shadowRootType.

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[route]

Perfect! Thx