Function runChild

__tests__/liveness-watchdog.test.ts:57–82

(
    env: Record<string, string>,
    body: string,
    hardTimeoutMs: number,
    progressPaths?: string[]
  )

  });

  function runChild(
    env: Record<string, string>,
    body: string,
    hardTimeoutMs: number,
    progressPaths?: string[]
  ): Promise<{ code: number | null; signal: NodeJS.Signals | 'TIMEOUT' | null }> {
    const src = `
      const { installMainThreadWatchdog } = require(${JSON.stringify(MODULE)});
      installMainThreadWatchdog(${progressPaths ? JSON.stringify({ progressPaths }) : ''});
      ${body}
    `;
    const child = spawn(process.execPath, ['-e', src], {
      env: { ...process.env, ...env },
      stdio: ['ignore', 'ignore', 'ignore'],
    });
    return new Promise((resolve) => {
      const timer = setTimeout(() => {
        child.kill('SIGKILL');
        resolve({ code: null, signal: 'TIMEOUT' });
      }, hardTimeoutMs);
      child.on('exit', (code, signal) => {
        clearTimeout(timer);
        resolve({ code, signal });
      });
    });
  }

  // Assert the watchdog terminated the process. POSIX surfaces the external
  // SIGKILL as signal 'SIGKILL'; Windows has no real signals, so the watchdog's