From bc61c9a2ae69993763c33b0fb5e453e70df45075 Mon Sep 17 00:00:00 2001
From: Alex Potsides <alex@achingbrain.net>
Date: Mon, 20 Nov 2023 12:15:18 +0000
Subject: [PATCH] fix: only overwrite source if readbuffer has bytes (#105)

There is no need to overwrite the source property of the passed
duplex if the readbuffer is empty.
---
 packages/it-byte-stream/src/index.ts | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/packages/it-byte-stream/src/index.ts b/packages/it-byte-stream/src/index.ts
index eddcfb8c..ee372234 100644
--- a/packages/it-byte-stream/src/index.ts
+++ b/packages/it-byte-stream/src/index.ts
@@ -152,11 +152,13 @@ export function byteStream <Stream extends Duplex<any, any, any>> (duplex: Strea
       }
     },
     unwrap: () => {
-      const originalStream = duplex.source
-      duplex.source = (async function * () {
-        yield * readBuffer
-        yield * originalStream
-      }())
+      if (readBuffer.byteLength > 0) {
+        const originalStream = duplex.source
+        duplex.source = (async function * () {
+          yield * readBuffer
+          yield * originalStream
+        }())
+      }
 
       return duplex
     }