import { test } from 'node:test';
import assert from 'node:assert/strict';
import { formatSpeed, formatEta } from './s3.logic.ts';

test('formatSpeed switches from KB/s to MB/s at 1 MiB/s', () => {
  assert.equal(formatSpeed(500 * 1024), '500 KB/s');
  assert.equal(formatSpeed(2.4 * 1024 * 1024), '2.4 MB/s');
});

test('formatEta uses seconds under a minute, m+s above', () => {
  assert.equal(formatEta(45), '45s');
  assert.equal(formatEta(125), '2m 5s');
  assert.equal(formatEta(0.2), '1s'); // ceil rounds up
});

test('formatEta rounds once, so the remainder cannot reach a minute', () => {
  // The previous spelling read 125 as "3m 5s", rounding the minutes up and
  // then adding the remainder it had already absorbed. Rounding to whole
  // seconds first is what stops both that and a "1m 60s" from 119.5.
  assert.equal(formatEta(119.5), '2m 0s');
  assert.equal(formatEta(59.5), '1m 0s');
  assert.equal(formatEta(3600), '60m 0s');
});