From 63a0e8b564d137fca020f8f8b6e7008e178d0bd0 Mon Sep 17 00:00:00 2001
From: Volker Mische <volker.mische@gmail.com>
Date: Sun, 21 Jan 2018 01:46:06 +0100
Subject: [PATCH] Add .parent property

---
 index.js                             | 10 ++++++++++
 test/node/test-buffer-alloc.js       |  4 ++--
 test/node/test-buffer-arraybuffer.js |  2 +-
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/index.js b/index.js
index c4576d7..5befc08 100644
--- a/index.js
+++ b/index.js
@@ -53,6 +53,16 @@ function typedArraySupport () {
   }
 }
 
+Object.defineProperty(Buffer.prototype, 'parent', {
+  enumerable: true,
+  get () {
+    if (!(this instanceof Buffer)) {
+      return undefined
+    }
+    return this.buffer
+  }
+})
+
 Object.defineProperty(Buffer.prototype, 'offset', {
   enumerable: true,
   get () {
diff --git a/test/node/test-buffer-alloc.js b/test/node/test-buffer-alloc.js
index 5d0e032..be384f0 100644
--- a/test/node/test-buffer-alloc.js
+++ b/test/node/test-buffer-alloc.js
@@ -931,12 +931,12 @@ if (common.hasCrypto) { // eslint-disable-line crypto-check
 } else {
   common.printSkipMessage('missing crypto');
 }
-/*
+
 var ps = Buffer.poolSize;
 Buffer.poolSize = 0;
 assert(Buffer.allocUnsafe(1).parent instanceof ArrayBuffer);
 Buffer.poolSize = ps;
-*/
+
 // Test Buffer.copy() segfault
 assert.throws(() => Buffer.allocUnsafe(10).copy(),
               /TypeError: argument should be a Buffer/);
diff --git a/test/node/test-buffer-arraybuffer.js b/test/node/test-buffer-arraybuffer.js
index a418752..4036812 100644
--- a/test/node/test-buffer-arraybuffer.js
+++ b/test/node/test-buffer-arraybuffer.js
@@ -17,7 +17,7 @@ var buf = Buffer.from(ab);
 assert.ok(buf instanceof Buffer);
 // For backwards compatibility of old .parent property test that if buf is not
 // a slice then .parent should be undefined.
-assert.equal(buf.parent, undefined);
+assert.equal(buf.parent, buf.buffer);
 assert.equal(buf.buffer, ab);
 assert.equal(buf.length, ab.byteLength);
 
-- 
2.34.1