import { test } from 'node:test';
import assert from 'node:assert/strict';
import { cancelDebounce, debounce, debounceMs, revertMs } from './timing.ts';

// No document under `node --test`, so every duration reads its fallback, which
// is the crate's current value. This is the pin: `makeover-timing` moving a
// number and this file not following is a failing test rather than a page that
// quietly disagrees with the stylesheet beside it.
test('the fallbacks are makeover-timing 0.1.1', () => {
  assert.equal(revertMs(), 1500);
  assert.equal(debounceMs(), 150);
});

test('a key runs once however many times it is called', async () => {
  let runs = 0;
  debounce('k', () => (runs += 1), 5);
  debounce('k', () => (runs += 1), 5);
  debounce('k', () => (runs += 1), 5);
  await new Promise((done) => setTimeout(done, 30));
  assert.equal(runs, 1);
});

test('two keys are two calls', async () => {
  const ran: string[] = [];
  debounce('a', () => ran.push('a'), 5);
  debounce('b', () => ran.push('b'), 5);
  await new Promise((done) => setTimeout(done, 30));
  assert.deepEqual(ran.sort(), ['a', 'b']);
});

test('cancelling drops the call that was waiting', async () => {
  let ran = false;
  debounce('c', () => (ran = true), 5);
  cancelDebounce('c');
  await new Promise((done) => setTimeout(done, 30));
  assert.equal(ran, false);
});