1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/tests/test262/prs/3994/built-ins/Uint8Array/prototype/toBase64/receiver-not-uint8array.js b/js/src/tests/test262/prs/3994/built-ins/Uint8Array/prototype/toBase64/receiver-not-uint8array.js
new file mode 100644
index 0000000000..53352ce4a5
--- /dev/null
+++ b/js/src/tests/test262/prs/3994/built-ins/Uint8Array/prototype/toBase64/receiver-not-uint8array.js
@@ -0,0 +1,36 @@
+// |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.prototype.tobase64
+description: Uint8Array.prototype.toBase64 throws if the receiver is not a Uint8Array
+includes: [testTypedArray.js]
+features: [uint8array-base64, TypedArray]
+---*/
+
+var toBase64 = Uint8Array.prototype.toBase64;
+
+var options = {};
+Object.defineProperty(options, "alphabet", {
+  get: function() {
+    throw new Test262Error("options.alphabet accessed despite incompatible receiver");
+  }
+});
+
+testWithTypedArrayConstructors(function(TA) {
+  if (TA === Uint8Array) return;
+  var sample = new TA(2);
+  assert.throws(TypeError, function() {
+    Uint8Array.prototype.toBase64.call(sample, options);
+  });
+});
+
+assert.throws(TypeError, function() {
+  Uint8Array.prototype.toBase64.call([], options);
+});
+
+assert.throws(TypeError, function() {
+  toBase64(options);
+});
+
+reportCompare(0, 0);