[gegl] tests: Add buffer test for abyss of a 0x0 buffer

[Daniel Sabo <daniels src gnome org>]

commit eee9f71641f4f3e1f53db555e1364a0a2036eb8a
Author: Daniel Sabo <DanielSabo gmail com>
Date:   Mon Nov 18 20:47:35 2013 -0800

    tests: Add buffer test for abyss of a 0x0 buffer

 tests/buffer/reference/get_abyss_empty_buffer.buf |  116 +++++++++++++++++++++
 tests/buffer/tests/get_abyss_empty_buffer.c       |   38 +++++++
 2 files changed, 154 insertions(+), 0 deletions(-)
---
diff --git a/tests/buffer/reference/get_abyss_empty_buffer.buf 
b/tests/buffer/reference/get_abyss_empty_buffer.buf
new file mode 100644
index 0000000..6279a08
--- /dev/null
+++ b/tests/buffer/reference/get_abyss_empty_buffer.buf
@@ -0,0 +1,116 @@
+Test: get_abyss_empty_buffer
+NONE
+▛▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▜
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▙▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▟
+CLAMP
+▛▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▜
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
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+▌                    ▐
+▌                    ▐
+▙▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▟
+LOOP
+▛▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▜
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
+▌                    ▐
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+▌                    ▐
+▌                    ▐
+▙▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▟
+BLACK
+▛▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▜
+▌                    ▐
+▌                    ▐
+▌                    ▐
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+▌                    ▐
+▌                    ▐
+▌                    ▐
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+▌                    ▐
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+▌                    ▐
+▌                    ▐
+▙▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▟
+WHITE
+▛▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▜
+▌████████████████████▐
+▌████████████████████▐
+▌████████████████████▐
+▌████████████████████▐
+▌████████████████████▐
+▌████████████████████▐
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+▌████████████████████▐
+▌████████████████████▐
+▙▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▟
diff --git a/tests/buffer/tests/get_abyss_empty_buffer.c b/tests/buffer/tests/get_abyss_empty_buffer.c
new file mode 100644
index 0000000..b7128a3
--- /dev/null
+++ b/tests/buffer/tests/get_abyss_empty_buffer.c
@@ -0,0 +1,38 @@
+TEST ()
+{
+  GeglAbyssPolicy  abyss_types[] = { GEGL_ABYSS_NONE,
+                                     GEGL_ABYSS_CLAMP,
+                                     GEGL_ABYSS_LOOP,
+                                     GEGL_ABYSS_BLACK,
+                                     GEGL_ABYSS_WHITE };
+  const gchar     *abyss_names[] = { "NONE",
+                                     "CLAMP",
+                                     "LOOP",
+                                     "BLACK",
+                                     "WHITE" };
+  gint            i;
+  GeglBuffer     *buffer, *buffer2;
+  const Babl     *format = babl_format ("Y float");
+  GeglRectangle   query_rect = {-10, -10, 20, 20};
+  GeglRectangle   buffer_rect = {0, 0, 0, 0};
+  gfloat          buf[query_rect.width * query_rect.height * sizeof(gfloat)];
+
+  test_start ();
+  buffer  = gegl_buffer_new (&buffer_rect, format);
+  buffer2 = gegl_buffer_new (&query_rect, format);
+
+  for (i = 0; i < G_N_ELEMENTS(abyss_types); ++i)
+    {
+      print (("%s\n", abyss_names[i]));
+
+      gegl_buffer_get (buffer, &query_rect, 1.0, format, buf, GEGL_AUTO_ROWSTRIDE, abyss_types[i]);
+      gegl_buffer_set (buffer2, &query_rect, 1.0, format, buf, GEGL_AUTO_ROWSTRIDE);
+
+      print_buffer (buffer2);
+    }
+
+  g_object_unref (buffer);
+  g_object_unref (buffer2);
+
+  test_end ();
+}