import { formatDate, parseDate, groupBy, sumBy, sleep, retry } from '../../src/common/utils';
describe('Utils', () => {
describe('formatDate', () => {
it('should format date correctly', () => {
const date = new Date('2024-01-15T12:00:00Z');
expect(formatDate(date)).toBe('2024-01-15');
});
});
describe('parseDate', () => {
it('should parse valid date string', () => {
const date = parseDate('2024-01-15');
expect(date.getFullYear()).toBe(2024);
expect(date.getMonth()).toBe(0); // January
expect(date.getDate()).toBe(15);
});
it('should throw on invalid date', () => {
expect(() => parseDate('invalid')).toThrow('Invalid date: invalid');
});
});
describe('groupBy', () => {
it('should group items by key function', () => {
const items = [
{ name: 'a', type: 'x' },
{ name: 'b', type: 'y' },
{ name: 'c', type: 'x' },
];
const grouped = groupBy(items, item => item.type);
expect(grouped).toEqual({
x: [{ name: 'a', type: 'x' }, { name: 'c', type: 'x' }],
y: [{ name: 'b', type: 'y' }],
});
});
});
describe('sumBy', () => {
it('should sum values correctly', () => {
const items = [{ value: 10 }, { value: 20 }, { value: 30 }];
expect(sumBy(items, item => item.value)).toBe(60);
});
});
describe('sleep', () => {
it('should delay execution', async () => {
const start = Date.now();
await sleep(100);
const duration = Date.now() - start;
expect(duration).toBeGreaterThanOrEqual(90);
expect(duration).toBeLessThan(200);
});
});
describe('retry', () => {
it('should retry on failure', async () => {
let attempts = 0;
const fn = jest.fn(async () => {
attempts++;
if (attempts < 3) {
throw new Error('Fail');
}
return 'success';
});
const result = await retry(fn, { initialDelay: 10 });
expect(result).toBe('success');
expect(fn).toHaveBeenCalledTimes(3);
});
it('should throw after max attempts', async () => {
const fn = jest.fn(async () => {
throw new Error('Always fail');
});
await expect(retry(fn, { maxAttempts: 2, initialDelay: 10 }))
.rejects.toThrow('Always fail');
expect(fn).toHaveBeenCalledTimes(2);
});
});
});
