More test suite infrastructure improvements:

- Remove cairo_test_expect_failure.  cairo-test.c now checks
  env var CAIRO_XFAIL_TESTS to see if the running test is
  expected to fail.  The reason for expected failure is
  appended to the test description.
- Test description is written out.
- Failed/crashed tests also write a line out to stderr (in red),
  so one can now redirect stdout to /dev/null to only see failures.
- cairo_test() has been changed to not take the draw function
  anymore, instead, draw function is now part of the test struct.
- "make check" doesn't allow limiting backends to test using env
  var anymore.  To limit backends to test, one should use the
  TARGETS variable on the make command line.
- "make check-valgrind" now writes its log to valgrind-log instead
  of valgrind.log, to not interfere with test log file processing.

1 files changed, 3 insertions, 2 deletions

diff --git a/test/gradient-alpha.c b/test/gradient-alpha.c
index 6ae06aac..1ec15599 100644
--- a/test/gradient-alpha.c
+++ b/test/gradient-alpha.c
@@ -28,7 +28,8 @@
 cairo_test_t test = {
     "gradient-alpha",
     "Tests drawing of a gradient with various alpha values in the color stops",
-    10, 10
+    10, 10,
+    draw
 };
 
 static cairo_test_status_t
@@ -57,5 +58,5 @@ draw (cairo_t *cr, int width, int height)
 int
 main (void)
 {
-    return cairo_test (&test, draw);
+    return cairo_test (&test);
 }