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[READ-ONLY] Mirror of https://github.com/wojtekmaj/async-array-utils. A collection of array-related async utilities.
array array-methods async promise utils
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3.6 kB · 126 lines
JavaScript
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127import asyncSomeStrict from './some_strict';
import { doubleInputArr, inputArr, largerThanTwo, largerThanTwoInRandomTime, largerThanOneHundred, largerThanOneHundredInRandomTime, makePushDuplicate, makePushDuplicateInRandomTime, makeDelayed, getTimer,} from '../test-utils';
const firstElementLargerThanTwo = inputArr.findIndex(largerThanTwo);
describe('asyncSomeStrict()', () => { it('example from README works as described', async () => { const indexes = [];
const largerThanZero = await asyncSomeStrict( [1, 2, 3], async (el, index) => { indexes.push(index); return el > 0; }, );
expect(largerThanZero).toBe(true); expect(indexes).toEqual([0]); });
it('takes exactly the time necessary to execute', async () => { const delay = 100;
const timer = getTimer();
timer.start();
await asyncSomeStrict([1, 2, 3], makeDelayed((el) => el < 0, delay));
const timeElapsed = timer.stop();
expect(timeElapsed).toBeGreaterThanOrEqual(delay); expect(timeElapsed).toBeLessThan((delay + 10) * 3); });
it.skip('assertions below are valid for synchronous .some()', () => { const mapper = jest.fn().mockImplementation(largerThanTwo);
inputArr.some(mapper);
expect.assertions(1 + firstElementLargerThanTwo);
expect(mapper).toHaveBeenCalledTimes(firstElementLargerThanTwo + 1); inputArr.slice(0, firstElementLargerThanTwo).forEach((el, idx) => { expect(mapper).toHaveBeenCalledWith(el, idx, inputArr); }); });
it('iterates over values properly', async () => { const mapper = jest.fn().mockImplementation(largerThanTwoInRandomTime);
await asyncSomeStrict(inputArr, mapper);
expect.assertions(1 + firstElementLargerThanTwo);
expect(mapper).toHaveBeenCalledTimes(firstElementLargerThanTwo + 1); inputArr.slice(0, firstElementLargerThanTwo).forEach((el, idx) => { expect(mapper).toHaveBeenCalledWith(el, idx, inputArr); }); });
it.skip('assertions below are valid for synchronous .map()', () => { const [arr, pushDuplicate] = makePushDuplicate(); const mapper = jest.fn().mockImplementation(pushDuplicate);
inputArr.some(mapper);
expect(mapper).toHaveBeenCalledTimes(inputArr.length); expect(arr).toEqual(doubleInputArr); });
it('iterates through an array properly with side effects', async () => { const [arr, pushDuplicate] = makePushDuplicateInRandomTime(); const mapper = jest.fn().mockImplementation(pushDuplicate);
await asyncSomeStrict(inputArr, mapper);
expect(mapper).toHaveBeenCalledTimes(inputArr.length); expect(arr).toEqual(doubleInputArr); });
it.skip('assertions below are valid for synchronous .some()', () => { const mapper = jest.fn().mockImplementation(largerThanTwo);
const result = inputArr.some(mapper);
expect(result).toEqual(true); });
it('returns truthy result properly', async () => { const mapper = jest.fn().mockImplementation(largerThanTwoInRandomTime);
const result = await asyncSomeStrict(inputArr, mapper);
expect(result).toEqual(true); });
it.skip('assertions below are valid for synchronous .some()', () => { const mapper = jest.fn().mockImplementation(largerThanOneHundred);
const result = inputArr.some(mapper);
expect(result).toEqual(false); });
it('returns falsy result properly', async () => { const mapper = jest.fn().mockImplementation(largerThanOneHundredInRandomTime);
const result = await asyncSomeStrict(inputArr, mapper);
expect(result).toEqual(false); });});