import { test, expect } from '@playwright/test';
import fs from 'node:fs/promises';

test('download report', async ({ page }, testInfo) => {
  await page.route('**/reports/monthly.csv', async route => {
    await route.fulfill({
      status: 200,
      headers: {
        'Content-Type': 'text/csv',
        'Content-Disposition': 'attachment; filename="report.csv"',
      },
      body: 'month,total\nJune,42\n',
    });
  });

  await page.setContent(`
    <a href="https://app.example.com/reports/monthly.csv">
      Download report
    </a>
  `);

  const downloadPromise = page.waitForEvent('download');
  await page.getByRole('link', { name: 'Download report' }).click();
  const download = await downloadPromise;

  expect(download.suggestedFilename()).toBe('report.csv');

  const savedPath = testInfo.outputPath('downloads', download.suggestedFilename());
  await download.saveAs(savedPath);

  const contents = await fs.readFile(savedPath, 'utf8');
  expect(contents).toContain('June,42');
});