Add return-abrupt-from-this-length tests for Change Array by Copy methods

Mirrors the existing pattern in findLast and findLastIndex.

Author: dmvjs

test/built-ins/Array/prototype/toReversed/return-abrupt-from-this-length.js

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+// Copyright (C) 2026 dmvjs. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toreversed
+description: >
+  Return abrupt from ToLength(Get(O, "length")).
+info: |
+  Array.prototype.toReversed ( )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+features: [change-array-by-copy]
+---*/
+
+var o1 = {};
+
+Object.defineProperty(o1, 'length', {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.toReversed.call(o1);
+});
+
+var o2 = {
+  length: {
+    valueOf: function() {
+      throw new Test262Error();
+    }
+  }
+};
+
+assert.throws(Test262Error, function() {
+  Array.prototype.toReversed.call(o2);
+});

test/built-ins/Array/prototype/toSorted/return-abrupt-from-this-length.js

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+// Copyright (C) 2026 dmvjs. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tosorted
+description: >
+  Return abrupt from ToLength(Get(O, "length")).
+info: |
+  Array.prototype.toSorted ( compareFn )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+features: [change-array-by-copy]
+---*/
+
+var o1 = {};
+
+Object.defineProperty(o1, 'length', {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.toSorted.call(o1);
+});
+
+var o2 = {
+  length: {
+    valueOf: function() {
+      throw new Test262Error();
+    }
+  }
+};
+
+assert.throws(Test262Error, function() {
+  Array.prototype.toSorted.call(o2);
+});

test/built-ins/Array/prototype/toSpliced/return-abrupt-from-this-length.js

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+// Copyright (C) 2026 dmvjs. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tospliced
+description: >
+  Return abrupt from ToLength(Get(O, "length")).
+info: |
+  Array.prototype.toSpliced ( start, deleteCount, ...items )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+features: [change-array-by-copy]
+---*/
+
+var o1 = {};
+
+Object.defineProperty(o1, 'length', {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.toSpliced.call(o1);
+});
+
+var o2 = {
+  length: {
+    valueOf: function() {
+      throw new Test262Error();
+    }
+  }
+};
+
+assert.throws(Test262Error, function() {
+  Array.prototype.toSpliced.call(o2);
+});

test/built-ins/Array/prototype/with/return-abrupt-from-this-length.js

@@ -0,0 +1,39 @@
+// Copyright (C) 2026 dmvjs. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  Return abrupt from ToLength(Get(O, "length")).
+info: |
+  Array.prototype.with ( index, value )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+features: [change-array-by-copy]
+---*/
+
+var o1 = {};
+
+Object.defineProperty(o1, 'length', {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.with.call(o1, 0, 1);
+});
+
+var o2 = {
+  length: {
+    valueOf: function() {
+      throw new Test262Error();
+    }
+  }
+};
+
+assert.throws(Test262Error, function() {
+  Array.prototype.with.call(o2, 0, 1);
+});