From bd114afa4a8c3bc9739767bbaba8e66774af0b7f Mon Sep 17 00:00:00 2001
From: Girish Ramakrishnan <girish@forwardbias.in>
Date: Mon, 21 Jan 2013 13:12:56 -0800
Subject: [PATCH 1/2] Add subtract

---
 adder.js | 4 ++++
 test.js  | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/adder.js b/adder.js
index 0c388fa..942df77 100644
--- a/adder.js
+++ b/adder.js
@@ -2,3 +2,7 @@ exports.add = function (x, y) {
 	return x + y;
 }
 
+exports.sub = function (x, y) { 
+	return x - y;
+}
+
diff --git a/test.js b/test.js
index 19f54c7..321336b 100644
--- a/test.js
+++ b/test.js
@@ -2,3 +2,5 @@ var adder = require('./adder'),
     assert = require('assert');
 
 assert(adder.add(4, 5) == 9);
+assert(adder.sub(4, 5) == -1);
+

From 385c6b0b772b14b4b697c43232627aaba9aedc7b Mon Sep 17 00:00:00 2001
From: Girish Ramakrishnan <girish@forwardbias.in>
Date: Mon, 21 Jan 2013 13:31:31 -0800
Subject: [PATCH 2/2] Add more comprehensive tests

---
 test.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/test.js b/test.js
index 321336b..fd778cc 100644
--- a/test.js
+++ b/test.js
@@ -2,5 +2,6 @@ var adder = require('./adder'),
     assert = require('assert');
 
 assert(adder.add(4, 5) == 9);
+assert(adder.add(4, 6) == 10);
 assert(adder.sub(4, 5) == -1);