Function withDevServer

packages/python/test/middleware.test.ts:13–76

(
  workPath: string,
  fn: (url: string) => Promise<void>
)

const fixturePath = path.join(fixturesPath, '42-fastapi-middleware');

async function withDevServer(
  workPath: string,
  fn: (url: string) => Promise<void>
) {
  const entrypoint = 'app.py';
  const config = { framework: 'fastapi' as const };

  // Create virtual environment and install dependencies if requirements.txt exists
  const requirementsPath = path.join(workPath, 'requirements.txt');
  if (await fs.pathExists(requirementsPath)) {
    try {
      // Create virtual environment
      await execa('python3', ['-m', 'venv', '.venv'], {
        cwd: workPath,
        stdio: 'inherit',
      });

      // Install dependencies in venv
      const venvPython =
        process.platform === 'win32'
          ? path.join(workPath, '.venv', 'Scripts', 'python.exe')
          : path.join(workPath, '.venv', 'bin', 'python');

      await execa(
        venvPython,
        ['-m', 'pip', 'install', '-r', 'requirements.txt'],
        {
          cwd: workPath,
          stdio: 'inherit',
        }
      );
    } catch (err) {
      console.warn('Failed to create venv or install dependencies:', err);
      // Continue anyway - maybe dependencies are already installed
    }
  }

  const result = await startDevServer({
    entrypoint,
    workPath,
    config,
    meta: { isDev: true },
    files: {},
    repoRootPath: workPath,
  });

  if (!result) {
    throw new Error('Failed to start dev server');
  }

  const { port, shutdown } = result;
  const url = `http://127.0.0.1:${port}`;

  // Wait a bit for server to be ready
  await new Promise(resolve => setTimeout(resolve, 2000));

  try {
    await fn(url);