From 679ad48603c0ffd50458a16e249ab7269d6f51b5 Mon Sep 17 00:00:00 2001
From: Alexey Shvayka <shvaikalesh@gmail.com>
Date: Mon, 24 Feb 2020 10:37:10 +0200
Subject: [PATCH] Add Array#reduceRight test

---
 .../reduceRight/length-near-integer-limit.js  | 49 +++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 test/built-ins/Array/prototype/reduceRight/length-near-integer-limit.js

diff --git a/test/built-ins/Array/prototype/reduceRight/length-near-integer-limit.js b/test/built-ins/Array/prototype/reduceRight/length-near-integer-limit.js
new file mode 100644
index 0000000000..f955b66e62
--- /dev/null
+++ b/test/built-ins/Array/prototype/reduceRight/length-near-integer-limit.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+  Elements are processed in an array-like object
+  whose "length" property is near the integer limit.
+info: |
+  Array.prototype.reduceRight ( callbackfn [ , initialValue ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+  [...]
+  9. Repeat, while k ≥ 0
+    a. Let Pk be ! ToString(k).
+    b. Let kPresent be ? HasProperty(O, Pk).
+    c. If kPresent is true, then
+      i. Let kValue be ? Get(O, Pk).
+      ii. Set accumulator to ? Call(callbackfn, undefined, « accumulator, kValue, k, O »).
+    [...]
+includes: [compareArray.js]
+---*/
+
+var arrayLike = {
+  length: Number.MAX_SAFE_INTEGER,
+};
+
+arrayLike[Number.MAX_SAFE_INTEGER - 1] = 1;
+arrayLike[Number.MAX_SAFE_INTEGER - 3] = 3;
+
+var accumulator = function(acc, el, index) {
+  acc.push([el, index]);
+
+  if (el === 3) {
+    throw acc;
+  }
+
+  return acc;
+};
+
+try {
+  Array.prototype.reduceRight.call(arrayLike, accumulator, []);
+  throw new Test262Error("should not be called");
+} catch (acc) {
+  assert.sameValue(acc.length, 2);
+  assert.compareArray(acc[0], [1, Number.MAX_SAFE_INTEGER - 1]);
+  assert.compareArray(acc[1], [3, Number.MAX_SAFE_INTEGER - 3]);
+}