From 8dc7713c2873c4d35d85cd8da4be9e3ead336321 Mon Sep 17 00:00:00 2001
From: Luigi Pinca <luigipinca@gmail.com>
Date: Tue, 6 Feb 2018 21:29:26 +0100
Subject: [PATCH] stream: fix misleading error message

The method to implement is `_write` not `_transform`.

PR-URL: https://github.com/nodejs/node/pull/18604
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
---
 lib/_stream_writable.js                              |  2 +-
 .../test-stream-writable-constructor-set-methods.js  | 12 +++++++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/lib/_stream_writable.js b/lib/_stream_writable.js
index 9c1b32b81dc957..f927d59491fb8c 100644
--- a/lib/_stream_writable.js
+++ b/lib/_stream_writable.js
@@ -551,7 +551,7 @@ function clearBuffer(stream, state) {
 }
 
 Writable.prototype._write = function(chunk, encoding, cb) {
-  cb(new errors.Error('ERR_METHOD_NOT_IMPLEMENTED', '_transform'));
+  cb(new errors.Error('ERR_METHOD_NOT_IMPLEMENTED', '_write'));
 };
 
 Writable.prototype._writev = null;
diff --git a/test/parallel/test-stream-writable-constructor-set-methods.js b/test/parallel/test-stream-writable-constructor-set-methods.js
index a12112d1ecc266..441e8ee75b337d 100644
--- a/test/parallel/test-stream-writable-constructor-set-methods.js
+++ b/test/parallel/test-stream-writable-constructor-set-methods.js
@@ -1,5 +1,5 @@
 'use strict';
-require('../common');
+const common = require('../common');
 const assert = require('assert');
 
 const Writable = require('stream').Writable;
@@ -26,6 +26,16 @@ w2.write(Buffer.from('blerg'));
 w2.write(Buffer.from('blerg'));
 w2.end();
 
+const w3 = new Writable();
+
+w3.on('error', common.expectsError({
+  type: Error,
+  code: 'ERR_METHOD_NOT_IMPLEMENTED',
+  message: 'The _write method is not implemented'
+}));
+
+w3.end(Buffer.from('blerg'));
+
 process.on('exit', function() {
   assert.strictEqual(w._write, _write);
   assert(_writeCalled);