[PATCH v2] msxml3/tests: add some regex tests

[Damjan Jovanovic]

Adds tests for all non-standard escape sequences used by MSXML I could
find, such as "$" (bug 29685), "\uNNNN" (bug 43581) and 13 others.

A patch to libxml2 implementing all those sequences is already available:
https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/116

Try 2 also tests MSXML40 where available (earlier versions can't be
tested as they don't support XSD schemas), calls the function
"test_regex()", and tests how the \uNNNN escape sequence handles non-BMP
characters in surrogate pairs.

Signed-off-by: Damjan Jovanovic 
---
 dlls/msxml3/tests/schema.c | 154 +++++++++++++++++++++++++++++++++++++
 1 file changed, 154 insertions(+)