Use old headless mode in Chrome browser

This also sets the environment variables necessary to tell Selenium to
reuse the browsers set up in the Dockerfile instead of downloading
them on its own.

Dockerfile

@@ -93,6 +93,10 @@ FROM base AS archivematica-acceptance-tests
 ARG USER_ID=1000
 ARG GROUP_ID=1000
 
+ENV SE_MANAGER_PATH=${SELENIUM_DIR}/bin/selenium-manager
+ENV SE_CHROME_PATH=${SELENIUM_DIR}/bin/google-chrome
+ENV SE_FIREFOX_PATH=${SELENIUM_DIR}/bin/firefox
+
 RUN set -ex \
 	&& apt-get -qqy update \
 	&& apt-get -qqy --no-install-recommends install \

amuser/selenium_ability.py

@@ -39,7 +39,7 @@ def get_driver(self):
         if self.driver_name == "Chrome":
             options = webdriver.ChromeOptions()
             if headless:
-                options.add_argument("--headless=new")
+                options.add_argument("--headless=old")
             driver = webdriver.Chrome(options=options)
             driver.set_window_size(1700, 900)
         elif self.driver_name == "Firefox":

simplebrowsertest.py

@@ -8,7 +8,7 @@
 
 def get_chrome_driver():
     options = webdriver.ChromeOptions()
-    options.add_argument("--headless")
+    options.add_argument("--headless=old")
     driver = webdriver.Chrome(options=options)
     return driver