[tests] Control SELENIUM_HEADLESS via env var

Author: nemesifier

openwisp_utils/test_selenium_mixins.py

@@ -1,6 +1,5 @@
 import os
 
-from django.conf import settings
 from selenium import webdriver
 from selenium.webdriver.common.by import By
 from selenium.webdriver.firefox.options import Options
@@ -23,7 +22,7 @@ def setUpClass(cls):
         super().setUpClass()
         firefox_options = Options()
         firefox_options.page_load_strategy = 'eager'
-        if getattr(settings, 'SELENIUM_HEADLESS', True):
+        if os.environ.get('SELENIUM_HEADLESS', False):
             firefox_options.add_argument('--headless')
         GECKO_BIN = os.environ.get('GECKO_BIN', None)
         if GECKO_BIN:

tests/openwisp2/settings.py

@@ -4,8 +4,6 @@
 
 SECRET_KEY = '@s8$swhj9du^aglt5+@ut^)wepr+un1m7r*+ixcq(-5i^st=y^'
 
-SELENIUM_HEADLESS = True if os.environ.get('SELENIUM_HEADLESS', False) else False
-
 DEBUG = True
 
 ALLOWED_HOSTS = []