Array length: add test ensuring RangeError is thrown

test/built-ins/Array/length/define-own-prop-length-error.js

@@ -0,0 +1,24 @@
+// Copyright (C) 2023 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Jordan Harband
+esid: sec-arraysetlength
+description: >
+  Setting an invalid array length throws a RangeError
+info: |
+  ArraySetLength ( A, Desc )
+
+  [...]
+  5. If SameValueZero(newLen, numberLen) is false, throw a RangeError exception.
+  [...]
+---*/
+
+assert.throws(RangeError, function () {
+  Object.defineProperty([], 'length', { value: -1, configurable: true });
+});
+
+assert.throws(RangeError, function () {
+  // the string is intentionally "computed" here to ensure there are no optimization bugs
+  Object.defineProperty([], 'len' + 'gth', { value: -1, configurable: true });
+});