1 files changed, 28 insertions, 0 deletions
diff --git a/js/src/tests/test262/prs/3994/built-ins/Uint8Array/fromHex/illegal-characters.js b/js/src/tests/test262/prs/3994/built-ins/Uint8Array/fromHex/illegal-characters.js
new file mode 100644
index 0000000000..718801e4c7
--- /dev/null
+++ b/js/src/tests/test262/prs/3994/built-ins/Uint8Array/fromHex/illegal-characters.js
@@ -0,0 +1,28 @@
+// |reftest| shell-option(--enable-uint8array-base64) skip-if(!Uint8Array.fromBase64||!xulRuntime.shell) -- uint8array-base64 is not enabled unconditionally, requires shell-options
+// Copyright (C) 2024 Kevin Gibbons. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-uint8array.fromhex
+description: Uint8Array.fromHex throws a SyntaxError when input has non-hex characters
+features: [uint8array-base64, TypedArray]
+---*/
+
+var illegal = [
+  'a.a',
+  'aa^',
+  'a a',
+  'a\ta',
+  'a\x0Aa',
+  'a\x0Ca',
+  'a\x0Da',
+  'a\u00A0a', // nbsp
+  'a\u2009a', // thin space
+  'a\u2028a', // line separator
+];
+illegal.forEach(function(value) {
+  assert.throws(SyntaxError, function() {
+    Uint8Array.fromHex(value)
+  });
+});
+
+reportCompare(0, 0);