Start to use the helpers introduced in "tests: add helpers to create
unique filenames".
Signed-off-by: Leandro Ribeiro <leandro.ribeiro@collabora.com>
Pekka: Dropped program name from output_filename_for_test_case() calls
as it is already added automatically.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
This adds a test to ensure that the DRM-backend writeback screenshooter
is working properly.
Signed-off-by: Leandro Ribeiro <leandro.ribeiro@collabora.com>