diff -r 000000000000 -r 6474c204b198 addon-sdk/source/lib/diffpatcher/test/index.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/addon-sdk/source/lib/diffpatcher/test/index.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+"use strict";
+
+var diff = require("../diff")
+var patch = require("../patch")
+
+exports["test diff"] = require("./diff")
+exports["test patch"] = require("./patch")
+
+exports["test patch(a, diff(a, b)) => b"] = function(assert) {
+  var a = { a: { b: 1 }, c: { d: 2 } }
+  var b = { a: { e: 3 }, c: { d: 4 } }
+
+  assert.deepEqual(patch(a, diff(a, b)), b, "patch(a, diff(a, b)) => b")
+}