import { describe, expect, test } from 'vitest';
import { formatDuration } from './duration';

describe('formatDuration', () => {
  test('under a minute renders 0:SS', () => {
    expect(formatDuration(42)).toBe('0:42');
    expect(formatDuration(5)).toBe('0:05');
  });

  test('under an hour renders M:SS', () => {
    expect(formatDuration(242)).toBe('4:02');
    expect(formatDuration(600)).toBe('10:00');
  });

  test('at or above an hour renders H:MM:SS', () => {
    expect(formatDuration(3600)).toBe('1:00:00');
    expect(formatDuration(3723)).toBe('1:02:03');
    expect(formatDuration(36000)).toBe('10:00:00');
  });

  test('zero renders 0:00', () => {
    expect(formatDuration(0)).toBe('0:00');
  });

  test('negative values clamp to 0:00', () => {
    expect(formatDuration(-1)).toBe('0:00');
    expect(formatDuration(-100)).toBe('0:00');
  });

  test('fractional seconds floor', () => {
    expect(formatDuration(61.9)).toBe('1:01');
  });
});