使用代码运行 runserver 命令

Question

I want to start a server with the manage.py runserver command and I'm trying for some time now but don't really find the right way.

from subprocess import Popen, PIPE
from django.test import TestCase
import unittest
from selenium import webdriver
from selenium.webdriver.common.keys import Keys

class ExampleClass(TestCase):

  def startServer(self):
    process = Popen(['cd C:\mypath'], stdin=PIPE, stdout=PIPE)
    process.stdin.write(['python', 'manage.py runserver'])

.
.
.
  def test_examplename(self):
    self.browser.get('http://localhost:8000')

Everytime I start the test it seems like the process is starting in background but as soon as the browser window pops up it shows me a "can't connect" error. So the server is not running.

Please note that the test is working fine when I start the server myself.

Answer 1

This thing

process = Popen(['cd C:\mypath'], stdin=PIPE, stdout=PIPE)
process.stdin.write(['python', 'manage.py runserver'])

will simply wont work since you are running a shell command in Popen. When you do a Popen it tries to run the program specified with the arguments given. You try to run cd but after it's done (and it probably failed since you are missing shell=True in the call to Popen) the process is closed, you cant write to its stdin, Popen doesnt open a shell (or a cmd instance in windows) it simply runs a program

if you want to run your server do it directly:

process = Popen(['python, 'C:\mypath\manage.py', 'runserver'], stdin=PIPE, stdout=PIPE)

Answer 2

I recommend you use LiveServerTestCase instead of TestCase for tests that use Selenium. Django will take care of starting and stopping the server, so you don't have to worry about it.

For more information and an example of a test case that uses Selenium, see the docs .