Function startWebServer

packages/render/e2e/integrations.spec.ts:94–135

(command: string, url: string, cwd: string)

};

const startWebServer = async (command: string, url: string, cwd: string) => {
  const output: string[] = [];
  const appendOutput = (source: 'stdout' | 'stderr', chunk: Buffer) => {
    output.push(`[${source}] ${chunk.toString()}`);
    output.splice(0, Math.max(0, output.length - 40));
  };
  const formatOutput = () =>
    output.length === 0
      ? 'No server output was captured.'
      : output.join('').trim();
  const child = child_process.spawn(command, {
    shell: true,
    cwd,
    detached: process.platform !== 'win32',
    stdio: ['ignore', 'pipe', 'pipe'],
  });
  child.stdout?.on('data', (chunk) => appendOutput('stdout', chunk));
  child.stderr?.on('data', (chunk) => appendOutput('stderr', chunk));

  const childExit = new Promise<never>((_, reject) => {
    child.once('error', reject);
    child.once('exit', (code, signal) => {
      reject(
        new Error(
          `Command "${command}" exited before ${url} became available. Exit code: ${code}; signal: ${signal}.\n\n${formatOutput()}`,
        ),
      );
    });
  });

  try {
    await Promise.race([waitForServer(url, 30_000), childExit]);
  } catch (error) {
    stopWebServer(child);
    if (error instanceof Error) {
      throw new Error(`${error.message}\n\n${formatOutput()}`);
    }
    throw error;
  }

  return child;
};

describe('integrations', () => {
  let page!: playwright.Page;