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// |reftest| shell-option(--enable-iterator-helpers) skip-if(!this.hasOwnProperty('Iterator')||!xulRuntime.shell) -- iterator-helpers is not enabled unconditionally, requires shell-options
// Copyright (C) 2023 Michael Ficarra. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-iteratorprototype.drop
description: >
Arguments and this value are evaluated in the correct order
info: |
%Iterator.prototype%.drop ( limit )
includes: [compareArray.js]
features: [iterator-helpers]
flags: []
---*/
let effects = [];
Iterator.prototype.drop.call(
{
get next() {
effects.push('get next');
return function () {
return { done: true, value: undefined };
};
},
},
{
valueOf() {
effects.push('ToNumber limit');
return 0;
},
}
);
assert.compareArray(effects, ['ToNumber limit', 'get next']);
effects = [];
assert.throws(TypeError, function () {
Iterator.prototype.drop.call(null, {
valueOf() {
effects.push('ToNumber limit');
return 0;
},
});
});
assert.compareArray(effects, []);
effects = [];
assert.throws(RangeError, function () {
Iterator.prototype.drop.call(
{
get next() {
effects.push('get next');
return function () {
return { done: true, value: undefined };
};
},
},
NaN
);
});
assert.compareArray(effects, []);
reportCompare(0, 0);
|
