Node module that demonstrates a failure to call native function as callback to Object.observe.

app.js

var my_module = require('./build/Release/my_module');
console.log(my_module.my_function); // Prints "[Function]", as expected
my_module.my_function(); // Prints "Ran my function."

// Create a dummy object
var foo = {}

// Let's hook up an observer to my object
Object.observe(foo, my_module.my_function);
foo.bar = true; // change object
// Nothing happens! my_function isn't called, and no exception is thrown

// Ok, let's just wrap the same function in an anonymous function
Object.observe(foo, function(changes) { my_module.my_function(changes); } );
foo.baz = true; // change object
// Prints "Ran my function."

binding.gyp

{       
    'targets': [
        {
            'target_name': 'my_module',
            'include_dirs': [ "<!(node -e \"require('nan')\")" ],
            'sources': [ 'my_module.cc' ],
        },
    ]
}

my_module.cc

#include <node.h>
#include "nan.h"

using namespace v8;

class my_class
{
 public:
  static NAN_METHOD(my_function);
};

NAN_METHOD(my_class::my_function)
{
  printf("Ran my function.\n");
  fflush(stdout);
}
  
void Init(Handle<Object> exports)
{
  exports->Set(NanSymbol("my_function"),
               FunctionTemplate::New(my_class::my_function)->GetFunction());
}

NODE_MODULE(my_module, Init)

package.json

{
  "name": "node_observer_test",
  "author": {
    "name": "Pras Velagapudi <psigen@gmail.com>",
    "email": "psigen@gmail.com"
  },
  "license": "BSD",
  "scripts": {
    "start": "node --harmony app.js"
  },
  "dependencies": {
    "nan": "~0.7.0"
  },
  "engines": {
    "node": ">=0.11.6"
  }
}