@hyperlane-xyz/utils/dist/arrays.test.js

General utilities and types for the Hyperlane network

import { expect } from 'chai';
import { chunk, exclude, randomElement } from './arrays.js';
describe('Arrays utilities', () => {
    describe('chunk', () => {
        it('should split an array into chunks of the specified size', () => {
            const result = chunk([1, 2, 3, 4, 5], 2);
            expect(result).to.deep.equal([[1, 2], [3, 4], [5]]);
        });
        it('should return an empty array when input is empty', () => {
            const result = chunk([], 2);
            expect(result).to.deep.equal([]);
        });
        it('should handle chunk size larger than array length', () => {
            const result = chunk([1, 2], 5);
            expect(result).to.deep.equal([[1, 2]]);
        });
    });
    describe('exclude', () => {
        it('should exclude the specified item from the list', () => {
            const result = exclude(2, [1, 2, 3, 2]);
            expect(result).to.deep.equal([1, 3]);
        });
        it('should return the same list if item is not found', () => {
            const result = exclude(4, [1, 2, 3]);
            expect(result).to.deep.equal([1, 2, 3]);
        });
        it('should return an empty list if all items are excluded', () => {
            const result = exclude(1, [1, 1, 1]);
            expect(result).to.deep.equal([]);
        });
    });
    describe('randomElement', () => {
        beforeEach(() => { });
        it('should return a random element from the list', () => {
            const list = [10, 20, 30];
            const result = randomElement(list);
            expect(result).to.be.oneOf(list);
        });
        it('should handle an empty list gracefully', () => {
            const result = randomElement([]);
            expect(result).to.be.undefined;
        });
    });
});
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