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/linear-gradient.c b/test/linear-gradient.c
index 8d09df38..fd8da680 100644
--- a/test/linear-gradient.c
+++ b/test/linear-gradient.c
@@ -57,7 +57,8 @@ static const int n_stops[] = { 2, 3 };
 cairo_test_t test = {
     "linear-gradient",
     "Tests the drawing of linear gradients",
-    WIDTH, HEIGHT
+    WIDTH, HEIGHT,
+    draw
 };
 
 static void
@@ -133,5 +134,5 @@ draw (cairo_t *cr, int width, int height)
 int
 main (void)
 {
-    return cairo_test (&test, draw);
+    return cairo_test (&test);
 }