Function runTestFile

lib/internal/test_runner/runner.js:492–601

(path, filesWatcher, opts)

}

function runTestFile(path, filesWatcher, opts) {
  const watchMode = filesWatcher != null;
  const testPath = path === kIsolatedProcessName ? '' : path;
  const testOpts = { __proto__: null, signal: opts.signal };
  const subtest = opts.root.createSubtest(FileTest, testPath, testOpts, async (t) => {
    const args = getRunArgs(path, opts);
    const stdio = ['pipe', 'pipe', 'pipe'];
    const env = { __proto__: null, NODE_TEST_CONTEXT: 'child-v8', ...(opts.env || process.env) };

    // Acquire a worker ID from the pool for process isolation mode
    let workerId;
    if (opts.workerIdPool) {
      workerId = opts.workerIdPool.acquire();
      env.NODE_TEST_WORKER_ID = String(workerId);
      debug('Assigned worker ID %d to test file: %s', workerId, path);
    }

    if (watchMode) {
      stdio.push('ipc');
      env.WATCH_REPORT_DEPENDENCIES = '1';
    }
    if (opts.root.harness.shouldColorizeTestFiles) {
      env.FORCE_COLOR = '1';
    }

    const child = spawn(
      process.execPath, args,
      {
        __proto__: null,
        signal: t.signal,
        encoding: 'utf8',
        env,
        stdio,
        cwd: opts.cwd,
      },
    );
    if (watchMode) {
      filesWatcher.runningProcesses.set(path, child);
      filesWatcher.watcher.watchChildProcessModules(child, path);
    }

    let err;

    child.on('error', (error) => {
      err = error;
    });

    child.stdout.on('data', (data) => {
      subtest.parseMessage(data);
    });

    const rl = new Interface({ __proto__: null, input: child.stderr });
    rl.on('line', (line) => {
      if (isInspectorMessage(line)) {
        process.stderr.write(line + '\n');
        return;
      }