1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/tests/test262/prs/3994/built-ins/Uint8Array/fromBase64/whitespace.js b/js/src/tests/test262/prs/3994/built-ins/Uint8Array/fromBase64/whitespace.js
new file mode 100644
index 0000000000..87c79a6563
--- /dev/null
+++ b/js/src/tests/test262/prs/3994/built-ins/Uint8Array/fromBase64/whitespace.js
@@ -0,0 +1,25 @@
+// |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.frombase64
+description: Uint8Array.fromBase64 ignores ASCII whitespace in the input
+includes: [compareArray.js]
+features: [uint8array-base64, TypedArray]
+---*/
+
+var whitespaceKinds = [
+  ["Z g==", "space"],
+  ["Z\tg==", "tab"],
+  ["Z\x0Ag==", "LF"],
+  ["Z\x0Cg==", "FF"],
+  ["Z\x0Dg==", "CR"],
+];
+whitespaceKinds.forEach(function(pair) {
+  var arr = Uint8Array.fromBase64(pair[0]);
+  assert.sameValue(arr.length, 1);
+  assert.sameValue(arr.buffer.byteLength, 1);
+  assert.compareArray(arr, [102], "ascii whitespace: " + pair[1]);
+});
+
+reportCompare(0, 0);