From 64e239b09258c9433ecd57b755967f6cccafa5e2 Mon Sep 17 00:00:00 2001
From: Timothy Gu <timothygu99@gmail.com>
Date: Sat, 8 Oct 2016 19:40:56 -0700
Subject: [PATCH] Improve Body spec compliance when body is null

---
 src/body.js     | 5 +++++
 src/response.js | 2 +-
 test/test.js    | 8 ++++++++
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/body.js b/src/body.js
index 962232f..349657e 100644
--- a/src/body.js
+++ b/src/body.js
@@ -79,6 +79,11 @@ export default class Body {
 
 		this[DISTURBED] = true;
 
+		// body is null
+		if (!this.body) {
+			return Body.Promise.resolve(new Buffer(0));
+		}
+
 		// body is string
 		if (typeof this.body === 'string') {
 			return Body.Promise.resolve(convertBody([new Buffer(this.body)], this.headers));
diff --git a/src/response.js b/src/response.js
index fb53a78..bc3175b 100644
--- a/src/response.js
+++ b/src/response.js
@@ -17,7 +17,7 @@ import Body, { clone } from './body';
  * @return  Void
  */
 export default class Response extends Body {
-	constructor(body, opts = {}) {
+	constructor(body = null, opts = {}) {
 		super(body, opts);
 
 		this.url = opts.url;
diff --git a/test/test.js b/test/test.js
index 180953d..34880c2 100644
--- a/test/test.js
+++ b/test/test.js
@@ -1427,6 +1427,14 @@ describe('node-fetch', () => {
 		});
 	});
 
+	it('should default to null as body', function() {
+		const res = new Response();
+		expect(res.body).to.equal(null);
+		return res.text().then(result => {
+			expect(result).to.equal('');
+		});
+	});
+
 	it('should default to 200 as status code', function() {
 		const res = new Response(null);
 		expect(res.status).to.equal(200);