diff --git a/.gitignore b/.gitignore
index 35d189f..59e24f1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,5 @@ registry.json
 *~
 *.log
 *.heapsnapshot
+zetta-runtime-HEAD
+zetta-runtime-jscoverage
diff --git a/bin/_coverage b/bin/_coverage
new file mode 100755
index 0000000..e082483
--- /dev/null
+++ b/bin/_coverage
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+if [ $(which jscoverage) ] 
+then
+  echo "Running test coverage..."
+  rm -rf ./zetta-runtime-HEAD
+  rm -rf ./zetta-runtime-jscoverage
+  git archive --format=tar --prefix=zetta-runtime-HEAD/ HEAD | tar x
+  jscoverage --exclude=node_modules ./zetta-runtime-HEAD ./zetta-runtime-jscoverage
+  cd ./zetta-runtime-jscoverage/
+  npm install
+  mocha --reporter html-cov > coverage.html
+  open coverage.html
+else
+  echo "jscoverage is not installed"
+  echo "if on OS X:"
+  echo "  use brew install jscoverage"
+  echo "if on linux:"
+  echo "  use sudo apt-get install jscoverage"
+fi
+
diff --git a/device.js b/device.js
new file mode 100644
index 0000000..a08298f
--- /dev/null
+++ b/device.js
@@ -0,0 +1,6 @@
+var uuid = require('node-uuid');
+
+var Device = module.exports = function(){
+  this.id = uuid.v4();
+};
+
diff --git a/machine_config.js b/machine_config.js
index 2d00c83..ffdc491 100644
--- a/machine_config.js
+++ b/machine_config.js
@@ -130,6 +130,24 @@ MachineConfig.prototype.call = function(/* type, ...args */) {
   }
 };
 
+MachineConfig.prototype.monitor = function(queueName) {
+  var propName = queueName;
+
+  queueName = this.machine.type + '/' + this.properties.id + '/' + propName;
+
+  this.machine.streams.push(queueName);
+
+  Object.defineProperty(this.machine, propName, {
+    get: function(){
+      return this.machine.properties[propName];
+    },
+    set: function(newValue){
+      pubsub.publish(queueName, newValue);
+      this.machine.properties[propName] = newValue;
+    }
+  });
+};
+
 MachineConfig.create = function(machine) {
   return new MachineConfig(machine);
 };
diff --git a/package.json b/package.json
index b07137e..01cd768 100644
--- a/package.json
+++ b/package.json
@@ -14,11 +14,15 @@
     "spdy": "~1.25.1",
     "titan": "~0.1.1",
     "strftime": "~0.8.0",
-    "ws": "^0.4.31"
+    "ws": "^0.4.31",
+    "node-uuid": "^1.4.1"
+  },
+  "devDependencies": {
+    "mocha": "^1.20.1"
   },
-  "devDependencies": {},
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "mocha",
+    "coverage":"bin/_coverage"
   },
   "repository": {
     "type": "git",
diff --git a/test/test.js b/test/test.js
new file mode 100644
index 0000000..5decd66
--- /dev/null
+++ b/test/test.js
@@ -0,0 +1,7 @@
+var assert = require('assert');
+
+describe('Hello', function() {
+  it('should be fine. 1==1', function() {
+    assert.equal(1, 1);
+  });
+});
diff --git a/zetta.js b/zetta.js
index b440495..56abbe0 100644
--- a/zetta.js
+++ b/zetta.js
@@ -1,5 +1,6 @@
 var Logger = require('./logger')();
 var Scientist = require('./scientist');
+var Device = require('./device');
 
 var Zetta = {}; 
 
@@ -11,4 +12,6 @@ Zetta.configure = function(/* args */) {
   return Scientist.configure.apply(null,arguments);
 };
 
+Zetta.Device = Device;
+
 module.exports = Zetta;