src/lib/chart-tools.test.ts

import { describe, expect, it } from 'vitest';
import { generateBarChartHtml, generatePieChartHtml } from './chart-tools';

describe('chart artifact generators', () => {
  it('renders escaped aligned data as a responsive bar chart', () => {
    const html = generateBarChartHtml({
      title: 'Build & test',
      labels: ['Alpha <script>', 'Beta'],
      values: [10, 5],
    });
    expect(html).toContain('Build &amp; test');
    expect(html).toContain('Alpha &lt;script&gt;');
    expect(html).toContain('width:100.0000%');
    expect(html).toContain('width:50.0000%');
  });

  it('renders parts of a positive whole as a pie chart', () => {
    const html = generatePieChartHtml({ title: 'Share', labels: ['One', 'Two'], values: [1, 3] });
    expect(html).toContain('conic-gradient(');
    expect(html).toContain('25.0%');
    expect(html).toContain('75.0%');
  });

  it('rejects mismatched or zero-only pie data', () => {
    expect(() => generateBarChartHtml({ title: 'Bad', labels: ['One'], values: [1, 2] })).toThrow('same length');
    expect(() => generatePieChartHtml({ title: 'Bad', labels: ['One'], values: [0] })).toThrow('positive total');
  });
});