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>

1 files changed, 11 insertions, 1 deletions

diff --git a/test/parallel/test-stream-writable-constructor-set-methods.js b/test/parallel/test-stream-writable-constructor-set-methods.js
index a12112d1ec..441e8ee75b 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);