add test for issue #14

src/test-duplex.js

@@ -238,6 +238,35 @@ describe("JSON-Patch-Duplex", function () {
       expect(patches).toEqual([]);
     });
 
+    //related issue: https://github.com/Starcounter-Jack/JSON-Patch/issues/14
+    it('should generate the same patch using Object.observe and shim', function() {
+      var arr1 = [
+        ["Albert", "Einstein"],
+        ["Erwin", "Shrodinger"]
+      ];
+
+      var arr2 = arr1.slice();
+
+      var newRecord = ['Niels', 'Bohr'];
+
+      var observer1 = jsonpatch.observe(arr1);
+      arr1.push(newRecord);
+
+      var objectObservePatches = jsonpatch.generate(observer1);
+
+      var _observe = Object.observe;
+      Object.observe = undefined;
+
+      var observer2 = jsonpatch.observe(arr2);
+      arr2.push(newRecord);
+
+      var shimPatches = jsonpatch.generate(observer2);
+
+      expect(objectObservePatches).toEqual(shimPatches);
+
+      Object.observe = _observe;
+    });
+
     /*it('should not generate the same patch twice (move)', function() { //"move" is not implemented yet in jsonpatch.generate
       obj = { lastName: {str: "Einstein"} };
       var observer = jsonpatch.observe(obj);