[test/surface-source] Skip tests if we cannot create the source surface.

Check that the test environment supports the desired source and avoid
triggering asserts in the test routines.

2 files changed, 18 insertions, 5 deletions

diff --git a/test/glitz-surface-source.c b/test/glitz-surface-source.c
index d70940a12..2dfa7355a 100644
--- a/test/glitz-surface-source.c
+++ b/test/glitz-surface-source.c
@@ -28,8 +28,6 @@
 #include <cairo-xlib.h>
 #include <cairo-xlib-xrender.h>
 
-#include <assert.h>
-
 #define NAME "glitz"
 #include "surface-source.c"
 
@@ -174,18 +172,25 @@ static cairo_surface_t *
 create_source_surface (int size)
 {
     struct closure *closure;
-    glitz_surface_t  * glitz_surface;
+    glitz_surface_t  *glitz_surface;
     cairo_surface_t *surface;
 
     closure = xcalloc (1, sizeof (struct closure));
 
     closure->dpy = XOpenDisplay (getenv("CAIRO_TEST_GLITZ_DISPLAY"));
-    assert (closure->dpy);
+    if (closure->dpy == NULL) {
+	free (closure);
+	return NULL;
+    }
 
     glitz_surface = _glitz_glx_create_surface (GLITZ_STANDARD_ARGB32,
 					       size, size,
 					       closure);
-    assert (glitz_surface != NULL);
+    if (glitz_surface == NULL) {
+	XCloseDisplay (closure->dpy);
+	free (closure);
+	return NULL;
+    }
 
     surface = cairo_glitz_surface_create (glitz_surface);
 
diff --git a/test/surface-source.c b/test/surface-source.c
index c7f333469..5a034ad09 100644
--- a/test/surface-source.c
+++ b/test/surface-source.c
@@ -89,5 +89,13 @@ draw (cairo_t *cr, int width, int height)
 int
 main (void)
 {
+    cairo_surface_t *surface;
+
+    surface = create_source_surface (SIZE);
+    if (surface == NULL) /* can't create the source so skip the test */
+	return CAIRO_TEST_SUCCESS;
+
+    cairo_surface_destroy (surface);
+
     return cairo_test (&test);
 }