lib: Add igt_subtest_group

Useful for creating common setup code in igt_fixture which is only
needed by a subset of tests. And since I'm a good citizen it comes
with a library testcase/example included.

v2: Make testcase nastier to ensure a subtest group SKIPS when it's
parent is skipping already. I accidentally got this right, but let's
make sure.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 6 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index a42382f3..6a3fac77 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,9 @@
+Release 1.15 (XXXX-XX-XX)
+-------------------------
+
+- Add igt_subtest_group to allow igt_fixture for only a subset of subtests
+  without skipping/failing all subsequent subtests.
+
 Release 1.14 (2016-03-01)
 -------------------------