1 files changed, 44 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArray/prototype/findLast/get-length-ignores-length-prop.js b/js/src/tests/test262/built-ins/TypedArray/prototype/findLast/get-length-ignores-length-prop.js
new file mode 100644
index 0000000000..2914416949
--- /dev/null
+++ b/js/src/tests/test262/built-ins/TypedArray/prototype/findLast/get-length-ignores-length-prop.js
@@ -0,0 +1,44 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-%typedarray%.prototype.findlast
+description: >
+  [[Get]] of "length" uses [[ArrayLength]]
+info: |
+  %TypedArray%.prototype.findLast (predicate [ , thisArg ] )
+  ...
+  3. Let len be O.[[ArrayLength]].
+  ...
+includes: [testTypedArray.js]
+features: [TypedArray, array-find-from-last]
+---*/
+
+Object.defineProperty(TypedArray.prototype, "length", {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+testWithTypedArrayConstructors(function(TA) {
+  Object.defineProperty(TA.prototype, "length", {
+    get: function() {
+      throw new Test262Error();
+    }
+  });
+
+  var sample = new TA([42]);
+
+  Object.defineProperty(sample, "length", {
+    get: function() {
+      throw new Test262Error();
+    },
+    configurable: true
+  });
+
+  assert.sameValue(
+    sample.findLast(function() { return true; }),
+    42
+  );
+});
+
+reportCompare(0, 0);