diff --git a/test/test-jsonfo.js b/test/test-jsonfo.js
new file mode 100644
index 0000000..c0ea588
--- /dev/null
+++ b/test/test-jsonfo.js
@@ -0,0 +1,35 @@
+var JSONfo = require('../js/jam/jsonfo')
+
+function C(tag) {
+  this.text=tag;
+  this.data={
+    text:tag,
+    id:function (id) {return id},
+  }
+}
+
+C.prototype.print = function () { return this.text }
+
+
+var o1 = new C('hello world');
+var o2 = new C('hello world');
+var o3 = new C('hello world');
+var o4 = new C('hello world');
+
+var data = {
+  x:1,
+  o:o2,
+  a:[1,2,3],
+  b:new Float64Array([1]),
+  f:function (x) { return 'test'+x},
+} 
+
+
+var ser = JSONfo.serialize(data,{C:C});
+
+print(ser)
+
+var des = JSONfo.deserialize(ser,{C:C});
+
+print(des)
+print(des.o.print())