Issue
I installed google-chrome in a Docker, but when I run my Python 2 script of Selenium, it failed like this:
automation@1c17781fef0c:/topology-editor/test$ python test.py
Traceback (most recent call last):
File "test.py", line 27, in <module>
browser = webdriver.Chrome()
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/chrome/webdriver.py", line 69, in __init__
desired_capabilities=desired_capabilities)
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 98, in __init__
self.start_session(desired_capabilities, browser_profile)
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 185, in start_session
response = self.execute(Command.NEW_SESSION, parameters)
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 249, in execute
self.error_handler.check_response(response)
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/errorhandler.py", line 194, in check_response
raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: unknown error: Chrome failed to start: crashed
(Driver info: chromedriver=2.31.488763 (092de99f48a300323ecf8c2a4e2e7cab51de5ba8),platform=Linux 4.4.0-83-generic x86_64)
And if I run google-chrome directly in docker, it shows below:
automation@1c17781fef0c:/topology-editor/test$ google-chrome
Failed to move to new namespace: PID namespaces supported, Network namespace supported, but failed: errno = Operation not permitted
Trace/breakpoint trap (core dumped)
automation@1c17781fef0c:/topology-editor/test$
System:
$ uname -a
Linux 1c17781fef0c 4.4.0-83-generic #106-Ubuntu SMP Mon Jun 26 17:54:43 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
$ google-chrome --version
Google Chrome 60.0.3112.78
$ chromedriver --version
ChromeDriver 2.31.488763 (092de99f48a300323ecf8c2a4e2e7cab51de5ba8)
Solution
You need to launch a standalone chrome browser
docker run -d -p 4444:4444 selenium/standalone-chrome
and then in your python script launch browser using Remote webdriver
from selenium import webdriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
driver = webdriver.Remote("http://127.0.0.1:4444/wd/hub", DesiredCapabilities.CHROME)
If you want you can also launch a Selenium Grid hub.
To do this as a django test do the following:
# docker-compse.yml
selenium:
image: selenium/standalone-firefox
ports:
- 4444:4444
# project/app/test.py
from django.test import TestCase
from selenium import webdriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
class SiteTest(TestCase):
fixtures = [
'app/fixtures/app.json',
...
]
def setUp(self):
self.browser = webdriver.Remote("http://selenium:4444/wd/hub", DesiredCapabilities.FIREFOX)
def tearDown(self):
self.browser.quit()
def test_visit_site(self):
self.browser.get('http://app:8000/')
self.assertIn(self.browser.title, 'Home')
Note:
If you use webdriver.ChromeOptions|FirefoxOptions|etc
then DesiredCapabalities
import is not necessary:
from selenium import webdriver
options = webdriver.ChromeOptions()
options.add_argument('--headless') # example
driver = webdriver.Remote("http://127.0.0.1:4444/wd/hub", options=options)
Answered By - Tarun Lalwani
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