Mickey Petersen <mickey@masteringemacs.org> writes:

> 1. Visit a python file. It will use the regular python mode.
> 2. Write:
>
>     def foo():
>          match foo:
>              case 10:
>                  pass
>
> 3. It is highlighted correctly: match and case are fontified with `font-lock-keyword-face'.
> 4. Type M-x python-ts-mode.
> 5. Highlighting is now off for match/case. Text properties for the `m' character are:
>
>     Character code properties: customize what to show
>       name: LATIN SMALL LETTER M
>       general-category: Ll (Letter, Lowercase)
>       decomposition: (109) ('m')
>       uppercase: 77 (M)
>       titlecase: 77 (M)
>
>     There are text properties here:
>       fontified            t
>

The following patch solves the issue by adding "case" and "match" to the
list of keywords that python-ts-mode recognizes.