Robert Mader authored Jan 26, 2022 and Marius Vlad committed May 24, 2022

Test different scenarios where child subsurfaces of unmapped
subsurfaces would get mapped. This test will fail in various
ways without the commit
"libweston/compositor: Do not map subsurfaces without buffer"

Also try to test potential regressions of that patch.

Signed-off-by: Robert Mader <robert.mader@collabora.com>
(cherry picked from commit c83f0a15)