From 5d560978ff5090d60946aff0bfcefca59cec01df Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juan=20Jos=C3=A9?= <soyjuanarbol@gmail.com>
Date: Wed, 18 Jan 2023 14:32:36 -0500
Subject: [PATCH] test: improve test coverage for WHATWG `TextDecoder`
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Signed-off-by: Juan José Arboleda <soyjuanarbol@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/45241
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
---
 .../test-whatwg-encoding-custom-textdecoder.js      | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/test/parallel/test-whatwg-encoding-custom-textdecoder.js b/test/parallel/test-whatwg-encoding-custom-textdecoder.js
index a48d0993fc7a92..e4379aa03f870d 100644
--- a/test/parallel/test-whatwg-encoding-custom-textdecoder.js
+++ b/test/parallel/test-whatwg-encoding-custom-textdecoder.js
@@ -51,6 +51,19 @@ assert(TextDecoder);
   });
 }
 
+// Invalid encoders
+{
+  ['meow', 'nonunicode', 'foo', 'bar'].forEach((fakeEncoding) => {
+    assert.throws(
+      () => { new TextDecoder(fakeEncoding); },
+      {
+        code: 'ERR_ENCODING_NOT_SUPPORTED',
+        name: 'RangeError'
+      }
+    );
+  });
+}
+
 // Test TextDecoder, UTF-8, fatal: true, ignoreBOM: false
 if (common.hasIntl) {
   ['unicode-1-1-utf-8', 'utf8', 'utf-8'].forEach((i) => {