Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 39 insertions, 0 deletions

diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-readonly-length.js b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-readonly-length.js
new file mode 100644
index 0000000000..f5f9495004
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-readonly-length.js
@@ -0,0 +1,39 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Promise is rejected if length property on an instance of a custom this-value
+  is non-writable
+info: |
+  3.j.ii.4.a. Perform ? Set(_A_, *"length"*, 𝔽(_k_), *true*).
+  ...
+  3.k.viii. Perform ? Set(_A_, *"length"*, 𝔽(_len_), *true*).
+
+  Note that there is no difference between strict mode and sloppy mode, because
+  we are not following runtime evaluation semantics.
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  function MyArray() {
+    Object.defineProperty(this, "length", {
+      enumerable: true,
+      writable: false,
+      configurable: true,
+      value: 99
+    });
+  }
+
+  await assert.throwsAsync(TypeError, () => Array.fromAsync.call(MyArray, [0, 1, 2]), "Setting read-only length fails");
+  await assert.throwsAsync(TypeError, () => Array.fromAsync.call(MyArray, {
+    length: 3,
+    0: 0,
+    1: 1,
+    2: 2
+  }), "Setting read-only length fails in array-like case");
+});