Something went wrong. Try again.
[READ-ONLY] Mirror of https://github.com/wojtekmaj/async-array-utils. A collection of array-related async utilities.
array array-methods async promise utils
Something went wrong. Try again.
2.0 kB · 74 lines
JavaScript
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475import asyncFilter from './filter';
import { getTimer, inputArr, largerThanTwo, largerThanTwoInRandomTime, makeDelayed,} from '../test-utils';
describe('asyncFilter()', () => { it('example from README works as described', async () => { const asyncFilteredArr = await asyncFilter([1, 2, 3], async (el) => el > 1);
expect(asyncFilteredArr).toEqual([2, 3]); });
it('takes exactly the time necessary to execute', async () => { const delay = 100;
const timer = getTimer();
timer.start();
await asyncFilter([1, 2, 3], makeDelayed((el) => el > 1, delay));
const timeElapsed = timer.stop();
expect(timeElapsed).toBeGreaterThanOrEqual(delay); expect(timeElapsed).toBeLessThan(delay + 10); });
it.skip('assertions below are valid for synchronous .filter()', () => { const filter = jest.fn().mockImplementation(largerThanTwo);
inputArr.filter(filter);
expect.assertions(1 + inputArr.length);
expect(filter).toHaveBeenCalledTimes(inputArr.length); inputArr.forEach((el, idx) => { expect(filter).toHaveBeenCalledWith(el, idx, inputArr); }); });
it('iterates over values properly', async () => { const filter = jest.fn().mockImplementation(largerThanTwoInRandomTime);
await asyncFilter(inputArr, filter);
expect.assertions(1 + inputArr.length);
expect(filter).toHaveBeenCalledTimes(inputArr.length); inputArr.forEach((el, idx) => { expect(filter).toHaveBeenCalledWith(el, idx, inputArr); }); });
it.skip('assertions below are valid for synchronous .filter()', () => { const filter = jest.fn().mockImplementation(largerThanTwo);
const result = inputArr.filter(filter);
expect(result).toEqual([3, 4, 5, 6, 7, 8, 9, 10]); });
it('filters array properly', async () => { const filter = jest.fn().mockImplementation(largerThanTwoInRandomTime);
const result = await asyncFilter(inputArr, filter);
expect(result).toEqual([3, 4, 5, 6, 7, 8, 9, 10]); });});