/**
 * Reading time estimation tests.
 */

import { describe, it, expect } from 'vitest';
import { estimateReadingTime } from './reading-time.js';

describe('estimateReadingTime', () => {
  it('returns 1 minute minimum for empty content', () => {
    const result = estimateReadingTime('');
    expect(result.minutes).toBe(1);
    expect(result.words).toBe(0);
  });

  it('returns 1 minute for short text', () => {
    const result = estimateReadingTime('Hello world');
    expect(result.minutes).toBe(1);
    expect(result.words).toBe(2);
  });

  it('strips HTML tags before counting', () => {
    const result = estimateReadingTime('<p>Hello <strong>world</strong></p>');
    expect(result.words).toBe(2);
  });

  it('calculates correct minutes for long text (~238 wpm)', () => {
    const words = Array.from({ length: 476 }, (_, i) => `word${i}`).join(' ');
    const result = estimateReadingTime(words);
    expect(result.words).toBe(476);
    expect(result.minutes).toBe(2);
  });

  it('rounds up reading time', () => {
    const words = Array.from({ length: 239 }, (_, i) => `word${i}`).join(' ');
    const result = estimateReadingTime(words);
    expect(result.words).toBe(239);
    expect(result.minutes).toBe(2); // 239/238 = 1.004 → ceil = 2
  });

  it('handles whitespace-heavy content correctly', () => {
    const result = estimateReadingTime('  one   two   three  ');
    expect(result.words).toBe(3);
  });
});