[gegl] tests: add a composition test for image-compare

[Téo Mazars <teom src gnome org>]

commit 24580c4f4395be162a5e19b51681dd90d8639b59
Author: Téo Mazars <teo mazars ensimag fr>
Date:   Thu Oct 24 08:48:06 2013 +0200

    tests: add a composition test for image-compare
    
    even if image-compare tests itself, the critical part being in
    simple/test-image-compare

 tests/compositions/Makefile.am                 |    1 +
 tests/compositions/image-compare.xml           |   28 ++++++++++++++++++++++++
 tests/compositions/reference/image-compare.png |  Bin 0 -> 330566 bytes
 3 files changed, 29 insertions(+), 0 deletions(-)
---
diff --git a/tests/compositions/Makefile.am b/tests/compositions/Makefile.am
index f9e09e0..2fdddf7 100644
--- a/tests/compositions/Makefile.am
+++ b/tests/compositions/Makefile.am
@@ -25,6 +25,7 @@ TESTS = \
   fattal02.xml                    \
   gamma.xml                       \
   hdr-color.xml                   \
+  image-compare.xml               \
   mantiuk06.xml                   \
   pixelize.xml                    \
   reflect.xml                     \
diff --git a/tests/compositions/image-compare.xml b/tests/compositions/image-compare.xml
new file mode 100644
index 0000000..c8e4d0b
--- /dev/null
+++ b/tests/compositions/image-compare.xml
@@ -0,0 +1,28 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<gegl>
+  <node operation='gegl:image-compare'>
+    <node operation='gegl:load'>
+      <params>
+       <param name='path'>data/car-stack.png</param>
+      </params>
+    </node>
+  </node>
+  <node operation='gegl:crop'>
+    <params>
+      <param name='x'>0</param>
+      <param name='y'>0</param>
+      <param name='width'>512</param>
+      <param name='height'>384</param>
+    </params>
+  </node>
+  <node operation='gegl:gaussian-blur'>
+      <param name='std_dev_y'>4.0</param>
+      <param name='std_dev_x'>4.0</param>
+  </node>
+  <node operation='gegl:load'>
+    <params>
+      <param name='path'>data/car-stack.png</param>
+    </params>
+  </node>
+</gegl>
+
diff --git a/tests/compositions/reference/image-compare.png b/tests/compositions/reference/image-compare.png
new file mode 100644
index 0000000..623c6db
Binary files /dev/null and b/tests/compositions/reference/image-compare.png differ