From 3a08ee731e2a6fa802fea67cfac9d2b237b59ba9 Mon Sep 17 00:00:00 2001
From: Jordi Oliveras Rovira <jordi.oliveras.rovira@gmail.com>
Date: Sat, 23 Feb 2019 01:45:32 +0100
Subject: [PATCH] @types/node (v10): add transcode function to buffer module.

---
 types/node/v10/buffer.d.ts   | 5 +++++
 types/node/v10/index.d.ts    | 1 +
 types/node/v10/node-tests.ts | 7 ++++++-
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/types/node/v10/buffer.d.ts b/types/node/v10/buffer.d.ts
index 1d618f2c4b..bf0ba0fe45 100644
--- a/types/node/v10/buffer.d.ts
+++ b/types/node/v10/buffer.d.ts
@@ -2,6 +2,11 @@ declare module "buffer" {
     export const INSPECT_MAX_BYTES: number;
     const BuffType: typeof Buffer;
 
+    export function transcode(
+        source: Buffer | Uint8Array,
+        fromEnc: "ascii" | "utf8" | "utf16le" | "ucs2" | "latin1" | "binary",
+        toEnc: "ascii" | "utf8" | "utf16le" | "ucs2" | "latin1" | "binary"): Buffer;
+
     export const SlowBuffer: {
         /** @deprecated since v6.0.0, use Buffer.allocUnsafeSlow() */
         new(size: number): Buffer;
diff --git a/types/node/v10/index.d.ts b/types/node/v10/index.d.ts
index a237502039..65f057b262 100644
--- a/types/node/v10/index.d.ts
+++ b/types/node/v10/index.d.ts
@@ -33,6 +33,7 @@
 //                 Jeremie Rodriguez <https://github.com/jeremiergz>
 //                 Samuel Ainsworth <https://github.com/samuela>
 //                 Kyle Uehlein <https://github.com/kuehlein>
+//                 Jordi Oliveras Rovira <https://github.com/j-oliveras>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 // NOTE: These definitions support NodeJS and TypeScript 3.1.
diff --git a/types/node/v10/node-tests.ts b/types/node/v10/node-tests.ts
index 3614c30f97..5872923676 100644
--- a/types/node/v10/node-tests.ts
+++ b/types/node/v10/node-tests.ts
@@ -35,7 +35,7 @@ import * as trace_events from "trace_events";
 import Module = require("module");
 
 // Specifically test buffer module regression.
-import { Buffer as ImportedBuffer, SlowBuffer as ImportedSlowBuffer } from "buffer";
+import { Buffer as ImportedBuffer, SlowBuffer as ImportedSlowBuffer, transcode } from "buffer";
 
 //////////////////////////////////////////////////////////
 /// Global Tests : https://nodejs.org/api/global.html  ///
@@ -632,6 +632,11 @@ function bufferTests() {
         const buffer = new Buffer('123');
         const octets = new Uint8Array(buffer.buffer);
     }
+
+    // Buffer module, transcode function
+    {
+        transcode(Buffer.from('€'), 'utf8', 'ascii'); // $ExpectType Buffer
+    }
 }
 
 ////////////////////////////////////////////////////