[gegl] tests: add hot tile consistency test

[N/A <ell src gnome org>]

commit e5f3f09693fdc58666254523fca06ea420f56e7f
Author: Ell <ell_se yahoo com>
Date:   Tue May 31 19:22:52 2016 +0000

    tests: add hot tile consistency test
    
    Tests the issue fixed by the previous commit.

 tests/simple/Makefile.am            |    1 +
 tests/simple/test-buffer-hot-tile.c |   94 +++++++++++++++++++++++++++++++++++
 2 files changed, 95 insertions(+), 0 deletions(-)
---
diff --git a/tests/simple/Makefile.am b/tests/simple/Makefile.am
index a51b5fb..ca0f47d 100644
--- a/tests/simple/Makefile.am
+++ b/tests/simple/Makefile.am
@@ -4,6 +4,7 @@ noinst_PROGRAMS =                       \
        test-buffer-cast                \
        test-buffer-changes             \
        test-buffer-extract             \
+       test-buffer-hot-tile    \
        test-buffer-tile-voiding        \
        test-change-processor-rect      \
        test-convert-format             \
diff --git a/tests/simple/test-buffer-hot-tile.c b/tests/simple/test-buffer-hot-tile.c
new file mode 100644
index 0000000..0dcad2e
--- /dev/null
+++ b/tests/simple/test-buffer-hot-tile.c
@@ -0,0 +1,94 @@
+/* This file is a test-case for GEGL
+ *
+ * GEGL is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * GEGL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with GEGL; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright (C) 2016 Ell
+ */
+
+#include "config.h"
+
+#include <stddef.h>
+#include <stdio.h>
+
+#include "gegl.h"
+
+#define SUCCESS    0
+#define FAILURE    -1
+
+/* Test case for the issue fixed by commit
+ * 5acc9f958577edab5fde02e0541fba5ff99685d9
+ */
+static gint
+test_set_clear_get (void)
+{
+  gint                 result = SUCCESS;
+  gint                 width, height;
+  const Babl          *format;
+  GeglBuffer          *buffer;
+  guchar               pixel;
+  const GeglRectangle  pixel_rect = {0, 0, 1, 1};
+
+  g_object_get (gegl_config(),
+                "tile-width",  &width,
+                "tile-height", &height,
+                NULL);
+
+  format = babl_format ("Y u8");
+  buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0, width, height), format);
+
+  /* Write 1 to the top-left pixel of the buffer. */
+  pixel = 1;
+  gegl_buffer_set (buffer, &pixel_rect, 0, format, &pixel, GEGL_AUTO_ROWSTRIDE);
+
+  /* Clear the buffer. */
+  gegl_buffer_clear (buffer, NULL);
+
+  /* Read back the pixel value; `pixel` should now be 0. */
+  gegl_buffer_get (buffer, &pixel_rect, 1.0, format, &pixel,
+                   GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+  if (pixel != 0)
+    result = FAILURE;
+
+  g_object_unref (buffer);
+
+  return result;
+}
+
+#define RUN_TEST(test) \
+  do \
+  { \
+    printf (#test "..."); \
+    fflush (stdout); \
+    \
+    if (test_##test () == SUCCESS) \
+      printf (" passed\n"); \
+    else \
+      { \
+        printf (" FAILED\n"); \
+        result = FAILURE; \
+      } \
+  } while (FALSE)
+
+int main (int argc, char *argv[])
+{
+  gint result = SUCCESS;
+
+  gegl_init (&argc, &argv);
+
+  RUN_TEST (set_clear_get);
+
+  gegl_exit ();
+
+  return result;
+}