[gegl] operations: Add test case for gegl:checkerboard

[Daniel Sabo <daniels src gnome org>]

commit 37746839f04989b61546e076a86d073a400fe17c
Author: Daniel Sabo <DanielSabo gmail com>
Date:   Mon Sep 30 18:57:36 2013 -0700

    operations: Add test case for gegl:checkerboard

 tests/compositions/Makefile.am                |    1 +
 tests/compositions/checkerboard.xml           |   29 +++++++++++++++++++++++++
 tests/compositions/reference/checkerboard.png |  Bin 0 -> 4638 bytes
 3 files changed, 30 insertions(+), 0 deletions(-)
---
diff --git a/tests/compositions/Makefile.am b/tests/compositions/Makefile.am
index 7271119..ff5cc61 100644
--- a/tests/compositions/Makefile.am
+++ b/tests/compositions/Makefile.am
@@ -31,6 +31,7 @@ testsuffix = .sh
 # EXTRA_DISTS
 TESTS = \
   run-affine-with-negative.xml.sh      \
+  run-checkerboard.xml.sh              \
   run-clones.xml.sh                    \
   run-composite-transform.xml.sh       \
   run-edge-laplace-broken.xml.sh       \
diff --git a/tests/compositions/checkerboard.xml b/tests/compositions/checkerboard.xml
new file mode 100644
index 0000000..3752c1a
--- /dev/null
+++ b/tests/compositions/checkerboard.xml
@@ -0,0 +1,29 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<gegl>
+  <node operation='gegl:crop'>
+      <params>
+          <param name='x'>-128.000000</param>
+          <param name='y'>-110.000000</param>
+          <param name='width'>256.000000</param>
+          <param name='height'>256.000000</param>
+      </params>
+  </node>
+  <node operation='gegl:over'>
+      <node operation='gegl:checkerboard'>
+          <params>
+              <param name='x-offset'>-2</param>
+              <param name='y-offset'>4</param>
+              <param name='color1'>rgba(0.0, 0.0, 0.0, 0.0)</param>
+              <param name='color2'>rgba(0.1, 0.1, 0.6, 0.5)</param>
+          </params>
+      </node>
+  </node>
+  <node operation='gegl:checkerboard'>
+      <params>
+          <param name='color1'>rgb(0.0, 0.0, 0.0)</param>
+          <param name='color2'>rgb(1.0, 1.0, 1.0)</param>
+          <param name='x'>32</param>
+          <param name='y'>32</param>
+      </params>
+  </node>
+</gegl>
diff --git a/tests/compositions/reference/checkerboard.png b/tests/compositions/reference/checkerboard.png
new file mode 100644
index 0000000..f2d668b
Binary files /dev/null and b/tests/compositions/reference/checkerboard.png differ