1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-clamped-to-2pow53minus1.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-clamped-to-2pow53minus1.js
new file mode 100644
index 0000000000..0ce88ef200
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-clamped-to-2pow53minus1.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Length is clamped to 2^53-1 when they exceed the integer limit.
+info: |
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+
+  ToLength ( argument )
+
+  1. Let len be ? ToIntegerOrInfinity(argument).
+  2. If len ≤ 0, return +0𝔽.
+  3. Return 𝔽(min(len, 2^53 - 1))
+features: [change-array-by-copy, exponentiation]
+includes: [compareArray.js]
+---*/
+
+var arrayLike = {
+  "9007199254740989": 2 ** 53 - 3,
+  "9007199254740990": 2 ** 53 - 2,
+  "9007199254740991": 2 ** 53 - 1,
+  "9007199254740992": 2 ** 53,
+  "9007199254740994": 2 ** 53 + 2, // NOTE: 2 ** 53 + 1 is 2 ** 53
+  length: 2 ** 53 + 20,
+};
+
+var result = Array.prototype.toSpliced.call(arrayLike, 0, 2 ** 53 - 3);
+
+assert.sameValue(result.length, 2);
+assert.compareArray(result, [2 ** 53 - 3, 2 ** 53 - 2]);
+
+reportCompare(0, 0);