From e3b4a5aafd960bdf5e730042cb5fecd85f9ed1ab Mon Sep 17 00:00:00 2001
From: Thorsten Lorenz <thlorenz@gmx.de>
Date: Fri, 13 Mar 2015 19:07:17 -0400
Subject: [PATCH] snapshot: adding snapshot.toJSON convenience method

---
 test/cpu_cprofiler.js | 12 +++++++++++-
 v8-profiler.js        | 15 +++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/test/cpu_cprofiler.js b/test/cpu_cprofiler.js
index 1607360..8448a41 100644
--- a/test/cpu_cprofiler.js
+++ b/test/cpu_cprofiler.js
@@ -1,4 +1,5 @@
 const binding = require('../build/Release/profiler'),
+      profiler = require('../'),
       expect  = require('chai').expect;
 
 const NODE_V_10 = /^v0\.10\.\d+$/.test(process.version),
@@ -210,6 +211,15 @@ describe('HEAP', function() {
         }
       );
     });
+
+    it('Snapshot.toJSON', function(done) {
+      var snapshot = profiler.takeSnapshot();
+      snapshot.toJSON(function callback(err, json) {
+        expect(!err);
+        expect(JSON.parse.bind(JSON, json)).to.not.throw();
+        done();
+      });
+    });
     
   });
   
@@ -218,4 +228,4 @@ describe('HEAP', function() {
       snapshot.delete();
     });
   }
-});
\ No newline at end of file
+});
diff --git a/v8-profiler.js b/v8-profiler.js
index 687efc3..81fe4cf 100644
--- a/v8-profiler.js
+++ b/v8-profiler.js
@@ -58,6 +58,21 @@ Snapshot.prototype.nodeCounts = function() {
   return objects;
 };
 
+Snapshot.prototype.toJSON = function toJSON(cb) {
+  var chunks = [];
+
+  function onChunk(chunk, len) {
+    chunks.push(chunk);
+  }
+
+  function onDone() {
+    var s = chunks.join('');
+    cb(null, s);
+  }
+
+  this.serialize(onChunk, onDone);
+};
+
 function CpuProfile() {}
 
 CpuProfile.prototype.getHeader = function() {