Added Selenium to the stack for Head testing

[gregelin]

@alexanderward Does "selenium-headless": true, and "test_visible": false, in environment.json conflict?

Here is my environment.json after running python run.py init:

BTW, I am running after updating requirements.in and requirements.txt for issue with Pillow reported by Snyk.

[gregelin]

Unable to run tests locally.

(venv) $ (selenium-head-docker) $ cat dev_env/docker/environment.json 
{
    "admins": [],
    "branding": "",
    "db": "postgres://postgres:PASSWORD@postgres_dev:5432/govready_q",
    "debug": true,
    "email": {},
    "enable_toolbar": false,
    "govready-url": "http://localhost:8000",
    "govready_cms_api_auth": "",
    "gr-img-generator": "wkhtmltopdf",
    "gr-pdf-generator": "wkhtmltopdf",
    "mailgun_api_key": "",
    "memcached": false,
    "okta": {},
    "secret-key": "jq)0vhewuso$z=qqtb^=2)9louud$dnlch-thutcbrhky56k_c",
    "selenium-grid-browser": "chrome",
    "selenium-headless": false,
    "session_security_expire_after": 1800,
    "session_security_expire_at_browser_close": true,
    "session_security_warn_after": 1200,
    "single-organization": "",
    "static": "static_root",
    "syslog": "",
    "test_visible": false,
    "trust-user-authentication-headers": {}
}

And tests come back like this from running docker exec -it govready-q-dev ./manage.py test

======================================================================
ERROR: setUpClass (siteapp.tests.QuestionsTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/src/app/siteapp/tests.py", line 75, in setUpClass
    super(SeleniumTest, cls).setUpClass()
  File "/usr/local/lib/python3.8/dist-packages/django/test/testcases.py", line 1548, in setUpClass
    raise cls.server_thread.error
  File "/usr/local/lib/python3.8/dist-packages/django/test/testcases.py", line 1474, in run
    self.httpd = self._create_server()
  File "/usr/local/lib/python3.8/dist-packages/django/test/testcases.py", line 1488, in _create_server
    return ThreadedWSGIServer((self.host, self.port), QuietWSGIRequestHandler, allow_reuse_address=False)
  File "/usr/local/lib/python3.8/dist-packages/django/core/servers/basehttp.py", line 71, in __init__
    super().__init__(*args, **kwargs)
  File "/usr/lib/python3.8/socketserver.py", line 452, in __init__
    self.server_bind()
  File "/usr/lib/python3.8/wsgiref/simple_server.py", line 50, in server_bind
    HTTPServer.server_bind(self)
  File "/usr/lib/python3.8/http/server.py", line 138, in server_bind
    socketserver.TCPServer.server_bind(self)
  File "/usr/lib/python3.8/socketserver.py", line 466, in server_bind
    self.socket.bind(self.server_address)
OSError: [Errno 98] Address already in use

======================================================================
ERROR: setUpClass (siteapp.tests.SupportPageTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/src/app/siteapp/tests.py", line 75, in setUpClass
    super(SeleniumTest, cls).setUpClass()
  File "/usr/local/lib/python3.8/dist-packages/django/test/testcases.py", line 1548, in setUpClass
    raise cls.server_thread.error
  File "/usr/local/lib/python3.8/dist-packages/django/test/testcases.py", line 1474, in run
    self.httpd = self._create_server()
  File "/usr/local/lib/python3.8/dist-packages/django/test/testcases.py", line 1488, in _create_server
    return ThreadedWSGIServer((self.host, self.port), QuietWSGIRequestHandler, allow_reuse_address=False)
  File "/usr/local/lib/python3.8/dist-packages/django/core/servers/basehttp.py", line 71, in __init__
    super().__init__(*args, **kwargs)
  File "/usr/lib/python3.8/socketserver.py", line 452, in __init__
    self.server_bind()
  File "/usr/lib/python3.8/wsgiref/simple_server.py", line 50, in server_bind
    HTTPServer.server_bind(self)
  File "/usr/lib/python3.8/http/server.py", line 138, in server_bind
    socketserver.TCPServer.server_bind(self)
  File "/usr/lib/python3.8/socketserver.py", line 466, in server_bind
    self.socket.bind(self.server_address)
OSError: [Errno 98] Address already in use

----------------------------------------------------------------------
Ran 38 tests in 22.453s

FAILED (errors=21)

[gregelin]

Pillow upgrade has been merged into this branch.