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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import * as assert from 'assert';
import * as collections from 'vs/base/common/collections';
suite('Collections', () => {
test('forEach', () => {
collections.forEach({}, () => assert(false));
collections.forEach(Object.create(null), () => assert(false));
let count = 0;
collections.forEach({ toString: 123 }, () => count++);
assert.strictEqual(count, 1);
count = 0;
const dict = Object.create(null);
dict['toString'] = 123;
collections.forEach(dict, () => count++);
assert.strictEqual(count, 1);
collections.forEach(dict, () => false);
// don't iterate over properties that are not on the object itself
const test = Object.create({ 'derived': true });
collections.forEach(test, () => assert(false));
});
test('groupBy', () => {
const group1 = 'a', group2 = 'b';
const value1 = 1, value2 = 2, value3 = 3;
const source = [
{ key: group1, value: value1 },
{ key: group1, value: value2 },
{ key: group2, value: value3 },
];
const grouped = collections.groupBy(source, x => x.key);
// Group 1
assert.strictEqual(grouped[group1].length, 2);
assert.strictEqual(grouped[group1][0].value, value1);
assert.strictEqual(grouped[group1][1].value, value2);
// Group 2
assert.strictEqual(grouped[group2].length, 1);
assert.strictEqual(grouped[group2][0].value, value3);
});
});
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