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diff --git a/auto_tests/tests/Proxy.js b/auto_tests/tests/Proxy.js
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+// Copyright (c)  2011 Google, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+/** 
+ * @fileoverview A general purpose object proxy that logs all method calls.
+ *
+ * @author konigsberg@google.com (Robert Konigsberg)
+ */
+
+var Proxy = function(delegate) {
+  this.delegate__ = delegate;
+  this.calls__ = [];
+  this.propertiesToTrack__ = [];
+
+  for (var propname in delegate) {
+    var type = typeof(delegate[propname]);
+
+    // Functions are passed through to the delegate, and are logged
+    // prior to the call.
+    if (type == "function") {
+      function makeFunc(name) {
+        return function() {
+          this.log__(name, arguments);
+          this.delegate__[name].apply(this.delegate__, arguments);
+        }
+      };
+      this[propname] = makeFunc(propname);
+    } else if (type == "string" || type == "number") {
+      // String and number properties are just passed through to the delegate.
+      this.propertiesToTrack__.push(propname);
+      function makeSetter(name) {
+        return function(x) {
+          this.delegate__[name] = x;
+        }
+      };
+      this.__defineSetter__(propname, makeSetter(propname));
+
+      function makeGetter(name) {
+        return function() {
+          return this.delegate__[name];
+        }
+      };
+      this.__defineGetter__(propname, makeGetter(propname));
+    }
+  }
+};
+
+Proxy.prototype.log__ = function(name, args) {
+  var properties = {};
+  for (var propIdx in this.propertiesToTrack__) {
+    var prop = this.propertiesToTrack__[propIdx];
+    properties[prop] = this.delegate__[prop];
+  }
+  var call = { name : name, args : args, properties: properties };
+  this.calls__.push(call);
+};
+