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// Copyright 2022 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --harmony-array-grouping
assertEquals(Array.prototype[Symbol.unscopables].group, true);
var array = [-0, 1, 0, 2];
var group = () => {
let result = array.group(v => v > 0);
result = Array.from(Object.entries(result));
return result;
}
// entry order matters
assertEquals(group(), [
['false', [-0, 0]],
['true', [1, 2]],
]);
Object.defineProperty(array, 4, {
enumerable: true,
configurable: true,
writable: true,
value: 3,
});
assertEquals(group(), [
['false', [-0, 0]],
['true', [1, 2, 3]],
]);
Object.defineProperty(array, 5, {
enumerable: true,
configurable: true,
get: () => 4,
});
var result = group();
assertEquals(result, [
['false', [-0, 0]],
['true', [1, 2, 3, 4]],
]);
assertSame(result[0][1][0], -0);
// fairly large result array
var length = 20000;
var array = new Array(length);
for (var idx = 0; idx < length; idx++) {
array[idx] = idx;
}
var group = () => {
let result = array.group(v => v % 2);
result = Array.from(Object.entries(result));
return result;
}
var result = group();
assertEquals(result, [
['0', array.filter(v => v % 2 === 0)],
['1', array.filter(v => v % 2 === 1)],
]);
// check array changed by callbackfn
var array = [-0, 0, 1, 2];
group = () => {
let result = array.group((v, idx) => {
if (idx === 1) {
array[2] = {a: 'b'};
}
return v > 0;
});
result = Array.from(Object.entries(result));
return result;
}
assertEquals(group(), [
['false', [-0, 0, {a: 'b'}]],
['true', [2]],
]);
// check array with holes
var array = [1, , 2, , 3, , 4];
var group = () => {
let result = array.group(v => v % 2 === 0 ? 'even' : 'not_even');
result = Array.from(Object.entries(result));
return result;
};
function checkNoHoles(arr) {
for (let idx = 0; idx < arr.length; idx++) {
assertTrue(Object.getOwnPropertyDescriptor(arr, idx) !== undefined);
}
}
var result = group();
assertEquals(result, [
['not_even', [1, undefined, undefined, 3, undefined]],
['even', [2, 4]],
]);
checkNoHoles(result[0][1]);
checkNoHoles(result[1][1]);
var array = [1, undefined, 2, undefined, 3, undefined, 4];
result = group();
assertEquals(result, [
['not_even', [1, undefined, undefined, 3, undefined]],
['even', [2, 4]],
]);
checkNoHoles(result[0][1]);
checkNoHoles(result[1][1]);
// array like objects
var arrayLikeObjects = [
{
'0': -1,
'1': 1,
'2': 2,
length: 3,
},
(function () { return arguments })(-1, 1, 2),
Int8Array.from([-1, 1, 2]),
Float32Array.from([-1, 1, 2]),
];
var group = () => {
let result = Array.prototype.group.call(array, v => v > 0);
result = Array.from(Object.entries(result));
return result;
};
for (var array of arrayLikeObjects) {
assertEquals(group(), [
['false', [-1]],
['true', [1, 2]],
]);
}
// check proto elements
var array = [,];
var group = () => {
let result = array.group(v => v);
result = Array.from(Object.entries(result));
return result;
}
assertEquals(group(), [
['undefined', [,]],
]);
array.__proto__.push(6);
assertEquals(group(), [
['6', [6]],
]);
// callbackfn throws
var array = [-0, 1, 0, 2];
assertThrows(
() => array.group(() => { throw new Error('foobar'); }),
Error,
'foobar'
);
// ToPropertyKey throws
var array = [-0, 1, 0, 2];
assertThrows(
() => array.group(() => {
return {
toString() {
throw new Error('foobar');
},
};
}),
Error,
'foobar'
);
// callbackfn is not callable
var array = [-0, 1, 0, 2];
assertThrows(
() => array.group('foobar'),
TypeError,
);
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