text: // Copyright 2016 Google LLC
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //      http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  const waitPort = require('wait-port');
  const assert = require('assert');
  const {spawn} = require('child_process');
  const path = require('path');
  
  const PORT = parseInt(process.env.PORT) || 8080;
  
  const appPath = path.join(__dirname, '../app.js');
  
  describe('server listening', () => {
    it('should be listening', async () => {
      spawn('node', [appPath]);
      const isOpen = await waitPort({port: PORT});
      assert(isOpen);
    });
  });
  