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Convert Array.prototype.group tests to Object.groupBy tests

This commit is contained in:
Jordan Harband 2023-05-18 23:09:11 -07:00 committed by Philip Chimento
parent 3e858ef02d
commit 49237f30de
31 changed files with 353 additions and 579 deletions
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2
features.txt
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@ -63,7 +63,7 @@ ShadowRealm
# https://github.com/tc39/proposal-array-find-from-last
array-find-from-last
# Array.prototype.group & Array.prototype.groupToMap
# Array.groupBy & Map.groupBy
# https://github.com/tc39/proposal-array-grouping
array-grouping

32
test/built-ins/Array/prototype/group/array-like.js vendored
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@ -1,32 +0,0 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
description: Array.prototype.group iterates array-like up to length
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
...
2. Let len be ? LengthOfArrayLike(O).
...
4. Let k be 0.
...
6. Repeat, while k < len
...
includes: [compareArray.js]
features: [array-grouping]
---*/
const arrayLike = {0: 1, 1: 2, 2: 3, 3: 4, length: 3 };
let calls = 0;
const obj = Array.prototype.group.call(arrayLike, function (i) { calls++; return i % 2 === 0 ? 'even' : 'odd'; });
assert.sameValue(calls, 3, 'only calls length times');
assert.compareArray(Object.keys(obj), ['odd', 'even']);
assert.compareArray(obj['even'], [2]);
assert.compareArray(obj['odd'], [1, 3]);

35
test/built-ins/Array/prototype/group/callback-arg.js vendored
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@ -1,35 +0,0 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
description: Array.prototype.group calls function with correct arguments
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
...
6. Repeat, while k < len
a. Let Pk be ! ToString(𝔽(k)).
b. Let kValue be ? Get(O, Pk).
c. Let propertyKey be ? ToPropertyKey(? Call(callbackfn, thisArg, « kValue, 𝔽(k), O »)).
d. Perform ! AddValueToKeyedGroup(groups, propertyKey, kValue).
e. Set k to k + 1.
...
features: [array-grouping]
---*/
const arr = [-0, 0, 1, 2, 3];
let calls = 0;
const map = arr.group(function (n, i, testArr) {
calls++;
assert.sameValue(n, arr[i], "selected element aligns with index");
assert.sameValue(testArr, arr, "original array is passed as final argument");
return null;
});
assert.sameValue(calls, 5, 'called for all 5 elements');

24
test/built-ins/Array/prototype/group/callback-throws.js vendored
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@ -1,24 +0,0 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
description: Array.prototype.group errors when return value cannot be converted to a property key.
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
...
6. Repeat, while k < len
c. Let propertyKey be ? ToPropertyKey(? Call(callbackfn, thisArg, « kValue, 𝔽(k), O »)).
...
features: [array-grouping]
---*/
assert.throws(Test262Error, function() {
const array = [1];
array.group(function() {
throw new Test262Error('throw in callback');
})
});

28
test/built-ins/Array/prototype/group/emptyList.js vendored
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@ -1,28 +0,0 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
description: Callback is not called and object is not populated if the array is empty
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
...
8. For each Record { [[Key]], [[Elements]] } g of groups, do
a. Let elements be ! CreateArrayFromList(g.[[Elements]]).
b. Perform ! CreateDataPropertyOrThrow(obj, g.[[Key]], elements).
...
features: [array-grouping]
---*/
const original = [];
const obj = original.group(function () {
throw new Test262Error('callback function should not be called')
});
assert.notSameValue(original, obj, 'group returns a object');
assert.sameValue(Object.keys(obj).length, 0);

30
test/built-ins/Array/prototype/group/evenOdd.js vendored
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@ -1,30 +0,0 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
description: Array.prototype.group populates object with correct keys and values
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
...
8. For each Record { [[Key]], [[Elements]] } g of groups, do
a. Let elements be ! CreateArrayFromList(g.[[Elements]]).
b. Perform ! CreateDataPropertyOrThrow(obj, g.[[Key]], elements).
...
includes: [compareArray.js]
features: [array-grouping]
---*/
const array = [1, 2, 3];
const obj = array.group(function (i) {
return i % 2 === 0 ? 'even' : 'odd';
});
assert.compareArray(Object.keys(obj), ['odd', 'even']);
assert.compareArray(obj['even'], [2]);
assert.compareArray(obj['odd'], [1, 3]);

31
test/built-ins/Array/prototype/group/get-throws.js vendored
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@ -1,31 +0,0 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
description: Array.prototype.group errors when accessing a getter throws.
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
...
6. Repeat, while k < len
a. Let Pk be ! ToString(𝔽(k)).
b. Let kValue be ? Get(O, Pk).
...
features: [array-grouping]
---*/
assert.throws(Test262Error, function() {
const arrayLike = Object.defineProperty({
length: 1,
}, '0', {
get: function() {
throw new Test262Error('no element for you');
}
});
Array.prototype.group.call(arrayLike, function() {
return 'key';
});
});

29
test/built-ins/Array/prototype/group/invalid-callback.js vendored
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@ -1,29 +0,0 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
description: Array.prototype.group called with non-callable throws TypeError
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
...
3. If IsCallable(callbackfn) is false, throw a TypeError exception.
...
features: [array-grouping]
---*/
assert.throws(TypeError, function() {
[].group(null)
}, "null callback throws TypeError");
assert.throws(TypeError, function() {
[].group(undefined)
}, "undefined callback throws TypeError");
assert.throws(TypeError, function() {
[].group({})
}, "object callback throws TypeError");

28
test/built-ins/Array/prototype/group/invalid-object.js vendored
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@ -1,28 +0,0 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
description: Array.prototype.group applied to null/undefined throws a TypeError
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
...
1. Let O be ? ToObject(this value).
...
features: [array-grouping]
---*/
const throws = function() {
throw new Test262Error('callback function should not be called')
};
assert.throws(TypeError, function() {
Array.prototype.group.call(undefined, throws);
}, 'undefined this value');
assert.throws(TypeError, function() {
Array.prototype.group.call(undefined, throws);
}, 'null this value');

28
test/built-ins/Array/prototype/group/invalid-property-key.js vendored
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@ -1,28 +0,0 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
description: Array.prototype.group errors when return value cannot be converted to a property key.
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
...
6. Repeat, while k < len
c. Let propertyKey be ? ToPropertyKey(? Call(callbackfn, thisArg, « kValue, 𝔽(k), O »)).
...
features: [array-grouping]
---*/
assert.throws(Test262Error, function() {
const array = [1];
array.group(function() {
return {
toString() {
throw new Test262Error('not a property key');
}
};
})
});

36
test/built-ins/Array/prototype/group/length-throw.js vendored
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@ -1,36 +0,0 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
description: Array.prototype.group errors when array-like's length can't be coerced.
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
...
2. Let len be ? LengthOfArrayLike(O).
...
features: [array-grouping]
---*/
assert.throws(Test262Error, function() {
const arrayLike = Object.defineProperty({}, 'length', {
get: function() {
throw new Test262Error('no length for you');
}
});
Array.prototype.group.call(arrayLike, function() {
return 'key';
});
});
assert.throws(TypeError, function() {
const arrayLike = {
length: 1n,
};
Array.prototype.group.call(arrayLike, function() {
return 'key';
});
});

26
test/built-ins/Array/prototype/group/length.js vendored
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@ -1,26 +0,0 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
description: Array.prototype.group property length descriptor
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
...
17 ECMAScript Standard Built-in Objects
...
includes: [propertyHelper.js]
features: [array-grouping]
---*/
verifyProperty(Array.prototype.group, "length", {
value: 1,
enumerable: false,
writable: false,
configurable: true
});

25
test/built-ins/Array/prototype/group/name.js vendored
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@ -1,25 +0,0 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
description: Array.prototype.group property name descriptor
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
...
17 ECMAScript Standard Built-in Objects
...
includes: [propertyHelper.js]
features: [array-grouping]
---*/
verifyProperty(Array.prototype.group, "name", {
value: "group",
enumerable: false,
writable: false,
configurable: true
});

27
test/built-ins/Array/prototype/group/null-prototype.js vendored
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@ -1,27 +0,0 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
description: Array.prototype.group returns a null prototype object
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
...
7. Let obj be OrdinaryObjectCreate(null).
...
9. Return obj.
...
features: [array-grouping]
---*/
const array = [1, 2, 3];
const obj = array.group(function (i) {
return i % 2 === 0 ? 'even' : 'odd';
});
assert.sameValue(Object.getPrototypeOf(obj), null);
assert.sameValue(obj.hasOwnProperty, undefined);

36
test/built-ins/Array/prototype/group/sparse-array.js vendored
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@ -1,36 +0,0 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
description: Array.prototype.group adds undefined to the group for sparse arrays
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
...
6. Repeat, while k < len
a. Let Pk be ! ToString(𝔽(k)).
b. Let kValue be ? Get(O, Pk).
c. Let propertyKey be ? ToPropertyKey(? Call(callbackfn, thisArg, « kValue, 𝔽(k), O »)).
d. Perform AddValueToKeyedGroup(groups, propertyKey, kValue).
...
includes: [compareArray.js]
features: [array-grouping]
---*/
let calls = 0;
const array = [, , ,];
const obj = array.group(function () {
calls++;
return 'key';
});
assert.sameValue(calls, 3);
assert(0 in obj['key'], 'group has a first element');
assert(1 in obj['key'], 'group has a second element');
assert(2 in obj['key'], 'group has a third element');
assert.compareArray(obj['key'], [void 0, void 0, void 0]);

57
test/built-ins/Array/prototype/group/this-arg-strict.js vendored
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@ -1,57 +0,0 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
description: Array.prototype.group calls with thisArg
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
...
6. Repeat, while k < len
c. Let propertyKey be ? ToPropertyKey(? Call(callbackfn, thisArg, « kValue, 𝔽(k), O »)).
...
flags: [onlyStrict]
features: [array-grouping]
---*/
let sentinel = {};
let result;
[1].group(function() {
result = this;
}, "TestString");
assert.sameValue(result, "TestString");
[1].group(function() {
result = this;
}, 1);
assert.sameValue(result, 1);
[1].group(function() {
result = this;
}, true);
assert.sameValue(result, true);
[1].group(function() {
result = this;
}, null);
assert.sameValue(result, null);
[1].group(function() {
result = this;
}, sentinel);
assert.sameValue(result, sentinel);
[1].group(function() {
result = this;
}, void 0);
assert.sameValue(result, void 0);
[1].group(function() {
result = this;
});
assert.sameValue(result, void 0);

60
test/built-ins/Array/prototype/group/this-arg.js vendored
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@ -1,60 +0,0 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
description: Array.prototype.group calls with thisArg
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
...
6. Repeat, while k < len
c. Let propertyKey be ? ToPropertyKey(? Call(callbackfn, thisArg, « kValue, 𝔽(k), O »)).
...
flags: [noStrict]
features: [array-grouping]
---*/
let sentinel = {};
let result;
[1].group(function() {
result = this;
}, "TestString");
assert.sameValue(result instanceof String, true);
assert.sameValue(result.valueOf(), "TestString");
[1].group(function() {
result = this;
}, 1);
assert.sameValue(result instanceof Number, true);
assert.sameValue(result.valueOf(), 1);
[1].group(function() {
result = this;
}, true);
assert.sameValue(result instanceof Boolean, true);
assert.sameValue(result.valueOf(), true);
[1].group(function() {
result = this;
}, null);
assert.sameValue(result, globalThis);
[1].group(function() {
result = this;
}, sentinel);
assert.sameValue(result, sentinel);
[1].group(function() {
result = this;
}, void 0);
assert.sameValue(result, globalThis);
[1].group(function() {
result = this;
});
assert.sameValue(result, globalThis);

37
test/built-ins/Array/prototype/group/toPropertyKey.js vendored
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@ -1,37 +0,0 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
description: Array.prototype.group coerces return value with ToPropertyKey
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
...
6. Repeat, while k < len
c. Let propertyKey be ? ToPropertyKey(? Call(callbackfn, thisArg, « kValue, 𝔽(k), O »)).
d. Perform AddValueToKeyedGroup(groups, propertyKey, kValue).
...
8. For each Record { [[Key]], [[Elements]] } g of groups, do
a. Let elements be ! CreateArrayFromList(g.[[Elements]]).
b. Perform ! CreateDataPropertyOrThrow(obj, g.[[Key]], elements).
...
includes: [compareArray.js]
features: [array-grouping]
---*/
let calls = 0;
const stringable = {
toString() {
return 1;
}
}
const array = [1, '1', stringable];
const obj = array.group(function (v) { return v; });
assert.compareArray(Object.keys(obj), ['1']);
assert.compareArray(obj['1'], [1, '1', stringable]);

32
test/built-ins/Object/groupBy/callback-arg.js Normal file
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@ -0,0 +1,32 @@
// Copyright (c) 2023 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-object.groupby
description: Object.groupBy calls function with correct arguments
info: |
Object.groupBy ( items, callbackfn )
...
GroupBy ( items, callbackfn, coercion )
6. Repeat,
e. Let key be Completion(Call(callbackfn, undefined, « value, 𝔽(k) »)).
...
features: [array-grouping]
---*/
const arr = [-0, 0, 1, 2, 3];
let calls = 0;
Object.groupBy(arr, function (n, i) {
calls++;
assert.sameValue(n, arr[i], "selected element aligns with index");
assert.sameValue(arguments.length, 2, "only two arguments are passed");
return null;
});
assert.sameValue(calls, 5, 'called for all 5 elements');

25
test/built-ins/Object/groupBy/callback-throws.js Normal file
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@ -0,0 +1,25 @@
// Copyright (c) 2023 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-object.groupby
description: Object.groupBy throws when callback throws
info: |
Object.groupBy ( items, callbackfn )
...
GroupBy ( items, callbackfn, coercion )
6. Repeat,
e. Let key be Completion(Call(callbackfn, undefined, « value, 𝔽(k) »)).
f. IfAbruptCloseIterator(key, iteratorRecord).
...
features: [array-grouping]
---*/
assert.throws(Test262Error, function() {
const array = [1];
Object.groupBy(array, function() {
throw new Test262Error('throw in callback');
})
});

27
test/built-ins/Object/groupBy/emptyList.js Normal file
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@ -0,0 +1,27 @@
// Copyright (c) 2023 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-object.groupby
description: Callback is not called and object is not populated if the iterable is empty
info: |
Object.groupBy ( items, callbackfn )
...
GroupBy ( items, callbackfn, coercion )
6. Repeat,
c. If next is false, then
i. Return groups.
...
features: [array-grouping]
---*/
const original = [];
const obj = Object.groupBy(original, function () {
throw new Test262Error('callback function should not be called')
});
assert.notSameValue(original, obj, 'Object.groupBy returns an object');
assert.sameValue(Object.keys(obj).length, 0);

22
test/built-ins/Object/groupBy/evenOdd.js Normal file
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@ -0,0 +1,22 @@
// Copyright (c) 2023 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-object.groupby
description: Object.groupBy populates object with correct keys and values
info: |
Object.groupBy ( items, callbackfn )
...
includes: [compareArray.js]
features: [array-grouping]
---*/
const array = [1, 2, 3];
const obj = Object.groupBy(array, function (i) {
return i % 2 === 0 ? 'even' : 'odd';
});
assert.compareArray(Object.keys(obj), ['odd', 'even']);
assert.compareArray(obj['even'], [2]);
assert.compareArray(obj['odd'], [1, 3]);

17
test/built-ins/Array/prototype/group/groupLength.js → test/built-ins/Object/groupBy/groupLength.js
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@ -1,19 +1,18 @@
// Copyright (c) 2021 Ecma International. All rights reserved.
// Copyright (c) 2023 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.group
esid: sec-object.groupby
description: Callback can return numbers that are converted to property keys
info: |
22.1.3.14 Array.prototype.group ( callbackfn [ , thisArg ] )
Object.groupBy ( items, callbackfn )
...
GroupBy ( items, callbackfn, coercion )
8. For each Record { [[Key]], [[Elements]] } g of groups, do
a. Let elements be ! CreateArrayFromList(g.[[Elements]]).
b. Perform ! CreateDataPropertyOrThrow(obj, g.[[Key]], elements).
6. Repeat,
c. If next is false, then
i. Return groups.
...
includes: [compareArray.js]
features: [array-grouping]
@ -21,7 +20,7 @@ features: [array-grouping]
const arr = ['hello', 'test', 'world'];
const obj = arr.group(function (i) { return i.length; });
const obj = Object.groupBy(arr, function (i) { return i.length; });
assert.compareArray(Object.keys(obj), ['4', '5']);
assert.compareArray(obj['5'], ['hello', 'world']);

29
test/built-ins/Object/groupBy/invalid-callback.js Normal file
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@ -0,0 +1,29 @@
// Copyright (c) 2023 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-object.groupby
description: Object.groupBy called with non-callable throws TypeError
info: |
Object.groupBy ( items, callbackfn )
...
GroupBy ( items, callbackfn, coercion )
2. If IsCallable(callbackfn) is false, throw a TypeError exception.
...
features: [array-grouping]
---*/
assert.throws(TypeError, function() {
Object.groupBy([], null)
}, "null callback throws TypeError");
assert.throws(TypeError, function() {
Object.groupBy([], undefined)
}, "undefined callback throws TypeError");
assert.throws(TypeError, function() {
Object.groupBy([], {})
}, "object callback throws TypeError");

34
test/built-ins/Object/groupBy/invalid-iterable.js Normal file
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@ -0,0 +1,34 @@
// Copyright (c) 2023 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-object.groupby
description: Object.groupBy with a nullish Symbol.iterator throws
info: |
Object.groupBy ( items, callbackfn )
...
GroupBy ( items, callbackfn, coercion )
4. Let iteratorRecord be ? GetIterator(items).
...
features: [array-grouping]
---*/
const throws = function () {
throw new Test262Error('callback function should not be called')
};
function makeIterable(obj, iteratorFn) {
obj[Symbol.iterator] = iteratorFn;
return obj;
}
assert.throws(TypeError, function () {
Object.groupBy(makeIterable({}, undefined), throws);
}, 'undefined Symbol.iterator');
assert.throws(TypeError, function () {
Object.groupBy(makeIterable({}, null), throws);
}, 'null Symbol.iterator');

31
test/built-ins/Object/groupBy/invalid-property-key.js Normal file
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@ -0,0 +1,31 @@
// Copyright (c) 2023 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-object.groupby
description: Object.groupBy errors when callback return value cannot be converted to a property key.
info: |
Object.groupBy ( items, callbackfn )
...
GroupBy ( items, callbackfn, coercion )
6. Repeat,
g. If coercion is property, then
i. Set key to Completion(ToPropertyKey(key)).
ii. IfAbruptCloseIterator(key, iteratorRecord).
...
features: [array-grouping]
---*/
assert.throws(Test262Error, function () {
const array = [1];
Object.groupBy(array, function () {
return {
toString() {
throw new Test262Error('not a property key');
}
};
})
});

31
test/built-ins/Object/groupBy/iterator-next-throws.js Normal file
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@ -0,0 +1,31 @@
// Copyright (c) 2023 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-object.groupby
description: Object.groupBy throws when iterator next throws
info: |
Object.groupBy ( items, callbackfn )
...
GroupBy ( items, callbackfn, coercion )
6. Repeat,
b. Let next be ? IteratorStep(iteratorRecord).
...
features: [array-grouping]
---*/
const throwingIterator = {
next: function next() {
throw new Test262Error('next() method was called');
}
};
assert.throws(Test262Error, function () {
Object.groupBy(throwingIterator, function () {
return 'key';
});
});

25
test/built-ins/Object/groupBy/length.js Normal file
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// Copyright (c) 2023 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-object.groupby
description: Object.groupBy property length descriptor
info: |
Object.groupBy ( items, callbackfn )
...
17 ECMAScript Standard Built-in Objects
...
includes: [propertyHelper.js]
features: [array-grouping]
---*/
verifyProperty(Object.groupBy, "length", {
value: 2,
enumerable: false,
writable: false,
configurable: true
});

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test/built-ins/Object/groupBy/name.js Normal file
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// Copyright (c) 2023 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-object.groupby
description: Object.groupBy property name descriptor
info: |
Object.groupBy ( items, callbackfn )
...
17 ECMAScript Standard Built-in Objects
...
includes: [propertyHelper.js]
features: [array-grouping]
---*/
verifyProperty(Object.groupBy, "name", {
value: "groupBy",
enumerable: false,
writable: false,
configurable: true
});

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test/built-ins/Object/groupBy/null-prototype.js Normal file
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// Copyright (c) 2023 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-object.groupby
description: Object.groupBy returns a null prototype object
info: |
Object.groupBy ( items, callbackfn )
...
2. Let obj be OrdinaryObjectCreate(null).
...
4. Return obj.
...
features: [array-grouping]
---*/
const array = [1, 2, 3];
const obj = Object.groupBy(array, function (i) {
return i % 2 === 0 ? 'even' : 'odd';
});
assert.sameValue(Object.getPrototypeOf(obj), null);
assert.sameValue(obj.hasOwnProperty, undefined);

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test/built-ins/Object/groupBy/toPropertyKey.js Normal file
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// Copyright (c) 2023 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-object.groupby
description: Object.groupBy coerces return value with ToPropertyKey
info: |
Object.groupBy ( items, callbackfn )
...
GroupBy ( items, callbackfn, coercion )
6. Repeat,
g. If coercion is property, then
i. Set key to Completion(ToPropertyKey(key)).
ii. IfAbruptCloseIterator(key, iteratorRecord).
...
includes: [compareArray.js]
features: [array-grouping]
---*/
let calls = 0;
const stringable = {
toString: function toString() {
return 1;
}
}
const array = [1, '1', stringable];
const obj = Object.groupBy(array, function (v) { return v; });
assert.compareArray(Object.keys(obj), ['1']);
assert.compareArray(obj['1'], [1, '1', stringable]);