[itecz26]

:scope after a comma inside :has() is accepted and mistranslated

parse_simple_selector() only accepts :scope when the token before its compound selector is the start of the input or a comma. #168 made :is()/:where()/:matches() pass inside_selector_list because a comma there separates arguments, but parse_relative_selector() (the :has() argument list) calls parse_simple_selector() with no flag, so the result depends on the argument's position:

>>> GenericTranslator().css_to_xpath("a:has(:scope)")
SelectorSyntaxError: Got pseudo-class ":scope" not at the start of a selector
>>> GenericTranslator().css_to_xpath("a:has(b, :scope)")
'descendant-or-self::a[(descendant::b) or (descendant::*[position() = 1])]'

The second XPath matches every <a> that has any child element, so a selector that should be rejected matches far more than its author wrote. With the fix, each relative selector in :has() is parsed with a new inside_relative_selector flag and :scope raises the same SelectorSyntaxError it already raises in :has(:scope) and :is(a, :scope). Other :has() arguments, and :scope at the start of a top-level selector (a, :scope > b), are unchanged.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.80%. Comparing base (a18ab0e) to head (f9ece4a).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #210   +/-   ##
=======================================
  Coverage   99.80%   99.80%           
=======================================
  Files           3        3           
  Lines        1002     1002           
  Branches      167      167           
=======================================
  Hits         1000     1000           
  Misses          1        1           
  Partials        1        1           

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