1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-arraylike.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-arraylike.js
new file mode 100644
index 0000000000..68b8fd603d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-arraylike.js
@@ -0,0 +1,36 @@
+// |reftest| shell-option(--enable-array-from-async) skip-if(!Array.fromAsync||!xulRuntime.shell) async -- Array.fromAsync is not enabled unconditionally, requires shell-options
+// 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: >
+  A synchronous mapping function is applied to each (awaited) item of an
+  arraylike.
+info: |
+  3.k.vii.4. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be ? Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+    ...
+  ...
+  6. Perform ? CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_).
+flags: [async]
+includes: [asyncHelpers.js, compareArray.js]
+features: [Array.fromAsync]
+---*/
+
+const arrayLike = {
+  length: 4,
+  0: 0,
+  1: 2,
+  2: Promise.resolve(4),
+  3: 6,
+};
+
+function syncMap(val, ix) {
+  return val * ix;
+}
+
+asyncTest(async () => {
+  const result = await Array.fromAsync(arrayLike, syncMap);
+  assert.compareArray(result, [0, 2, 8, 18], "sync mapfn should be applied to arraylike");
+});