test: increase coverage of Buffer.transcode

Adds test for transcoding an empty buffer. PR-URL: #10437 Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Evan Lucas <[email protected]> Reviewed-By: Michaël Zasso <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: James M Snell <[email protected]>

Author: joyeecheung

test/parallel/test-icu-transcode.js

@@ -70,3 +70,8 @@ assert.deepStrictEqual(
 buffer.transcode(uint8array,'latin1','utf16le'),
 Buffer.from('hä','utf16le'));
 }
+
+{
+constdest=buffer.transcode(newUint8Array(),'utf8','latin1');
+assert.strictEqual(dest.length,0);
+}