import { expect, test } from 'vite-plus/test';
import { randomUUID } from '../web/randomUUID';
import { createULID, isULID, parseULID, ulid } from './ulid';

test('isULID', () => {
	for (const [a, b] of [
		[undefined, false],
		[null, false],
		['', false],
		[randomUUID(), false],
		[ulid(), true],
	] as const) {
		expect(isULID(a), `${a} -> ${b}`).toEqual(b);
	}
});

test('ulid', () => {
	// monotonic
	{
		let lastTime = 0;
		const ulid = createULID({
			now: () => {
				lastTime ||= Date.now();
				return lastTime;
			},
		});

		const ulid1 = ulid();
		expect(parseULID(ulid1).timestamp).toBe(lastTime);
		expect(isULID(ulid1), ulid1).toBeTruthy();

		const ulid2 = ulid();
		expect(ulid1 < ulid2).toBeTruthy();
		expect(isULID(ulid2), ulid2).toBeTruthy();
		expect(parseULID(ulid2).timestamp).toBe(lastTime);
	}

	{
		const next = createULID();
		expect(isULID(next().toLowerCase())).toBeTruthy();
		expect(isULID('ttttttttttrrrrrrrrrrrrrrrr')).toBeTruthy();
	}
});