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// Copyright (C) 2020 Sony Interactive Entertainment Inc. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.unshift
description: >
Array#unshift throws TypeError upon attempting to modify a string
info: |
Array.prototype.unshift ( ...items )
...
4. If argCount > 0, then
...
c. Repeat, while k > 0,
...
iv. If fromPresent is true, then
...
2. Perform ? Set(O, to, fromValue, true).
...
...
f. Repeat, while items is not empty
...
Perform ? Set(O, ! ToString(j), E, true).
...
5. Perform ? Set(O, "length", len + argCount, true).
Set ( O, P, V, Throw )
...
4. Let success be ? O.[[Set]](P, V, O).
5. If success is false and Throw is true, throw a TypeError exception.
---*/
assert.throws(TypeError, () => {
Array.prototype.unshift.call('');
}, "Array.prototype.unshift.call('')");
assert.throws(TypeError, () => {
Array.prototype.unshift.call('', 1);
}, "Array.prototype.unshift.call('', 1)");
assert.throws(TypeError, () => {
Array.prototype.unshift.call('abc');
}, "Array.prototype.unshift.call('abc')");
assert.throws(TypeError, () => {
Array.prototype.unshift.call('abc', 1);
}, "Array.prototype.unshift.call('abc', 1)");
reportCompare(0, 0);
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