import { render } from '@testing-library/react';
import { describe, it, expect } from 'vitest';
import { HiloConductor } from '../HiloConductor';

describe('<HiloConductor />', () => {
  it('is decorative: hidden from assistive tech', () => {
    const { container } = render(<HiloConductor />);
    const svg = container.querySelector('svg');
    expect(svg).toHaveAttribute('aria-hidden', 'true');
    expect(svg).toHaveAttribute('focusable', 'false');
  });

  it('draws a single continuous thread', () => {
    const { container } = render(<HiloConductor />);
    expect(container.querySelectorAll('path')).toHaveLength(1);
  });

  it('travels with the document instead of sticking to the viewport', () => {
    const { container } = render(<HiloConductor />);
    // `fixed` would read as an ornament pinned to the window; the thread
    // belongs to the page and must scroll with it.
    expect(container.firstElementChild?.className).toContain('absolute');
    expect(container.firstElementChild?.className).not.toContain('fixed');
  });

  it('stays out of the way of pointer input', () => {
    const { container } = render(<HiloConductor />);
    expect(container.firstElementChild?.className).toContain('pointer-events-none');
  });
});