new_contents: import os
  import time
  
  import pytest
  import requests
  import json
  import yaml
  
  
  HERE = os.path.dirname(os.path.abspath(__file__))
  
  
  @pytest.fixture()
  def sess():
      sess = requests.Session()
      sess.headers = {
          'Content-Type': 'application/json'
      }
      return sess
  
  
  class TestStartProc(object):
  
      def test_start_proc(self, sess):
          doc = {
              'cmd': 'python -m SimpleHTTPServer 7000'.split()
          }
  
          resp = sess.post('http://localhost:5000/run/',
                           data=json.dumps(doc))
          result = resp.json()
          assert os.path.exists('/proc/%s' % result['pid'])
          assert os.kill(result['pid'], 0) is None
  
  
  class TestStartHelloProc(object):
      url = 'http://localhost:5000/files/hello_server.py'
      example_server = os.path.join(HERE, '..', 'example', 'hello_server.py')
      example_spec = os.path.join(HERE, '..', 'example', 'hello_spec.yaml')
  
      def put_file(self, sess):
          resp = sess.put(self.url,
                          headers={'Content-Type': 'application/octet-stream'},
                          data=open(self.example_server))
          assert resp.ok
  
      def upload_spec(self, sess):
          spec = yaml.safe_load(open(self.example_spec))
          resp = sess.post('http://localhost:5000/run/',
                           data=json.dumps(spec))
          assert resp.ok
  
      def test_put_file(self, sess):
          self.put_file(sess)
  
          resp = sess.get(self.url)
          assert resp.ok
          assert resp.content == open(self.hello_server).read()
  
      def test_run_hello_server(self, sess):
          self.put_file(sess)
          self.upload_spec(sess)
  
          time.sleep(10)
  
          resp = sess.get('http://localhost:6010/')
          assert resp.ok
          assert resp.content == 'Hello World!'
  
subject: Add some initial tests. These require the server to be running.