Make selenium tests backwards compatible

Make using pre-selenium v4 syntax an option. See:

https: //review.opendev.org/c/openstack/openstack-helm-infra/+/883894/5/nagios/templates/bin/_selenium-tests.py.tpl
Change-Id: I982029e620d944458ac0a4670189534023a6f972

nagios/Chart.yaml

@@ -15,7 +15,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm Nagios
 name: nagios
-version: 0.1.8
+version: 0.1.9
 home: https://www.nagios.org
 sources:
   - https://opendev.org/openstack/openstack-helm-addons

nagios/templates/bin/_selenium-tests.py.tpl

@@ -22,7 +22,9 @@ from selenium.webdriver.common.by import By
 from selenium.webdriver.support.ui import WebDriverWait
 from selenium.webdriver.support import expected_conditions as EC
 from selenium.webdriver.chrome.options import Options
+{{- if .Values.selenium_v4 }}
 from selenium.webdriver.chrome.service import Service
+{{- end }}
 from selenium.common.exceptions import TimeoutException
 from selenium.common.exceptions import NoSuchElementException
 from selenium.common.exceptions import ScreenshotException
@@ -51,7 +53,11 @@ def get_variable(env_var):
 def click_link_by_name(link_name):
     try:
         logger.info("Clicking '{}' link".format(link_name))
+{{- if .Values.selenium_v4 }}
         link = browser.find_element(By.LINK_TEXT, link_name)
+{{- else }}
+        link = browser.find_element_by_text_link(link_name)
+{{- end }}
         link.click()
     except NoSuchElementException:
         logger.error("Failed clicking '{}' link".format(link_name))
@@ -80,8 +86,12 @@ options.add_argument('--headless')
 options.add_argument('--no-sandbox')
 options.add_argument('--window-size=1920x1080')
 
+{{- if .Values.selenium_v4 }}
 service = Service(executable_path=chrome_driver)
 browser = webdriver.Chrome(service=service, options=options)
+{{- else }}
+browser = webdriver.Chrome(chrome_driver, chrome_options=options)
+{{- end }}
 
 try:
     logger.info('Attempting to connect to Nagios')

nagios/values.yaml

@@ -29,6 +29,9 @@ images:
       - dep_check
       - image_repo_sync
 
+# Use selenium v4 syntax
+selenium_v4: true
+
 labels:
   nagios:
     node_selector_key: openstack-control-plane

releasenotes/notes/nagios.yaml

@@ -9,4 +9,5 @@ nagios:
   - 0.1.6 Added OCI registry authentication
   - 0.1.7 Upgrade osh-selenium image to latest-ubuntu_focal
   - 0.1.8 Use helm toolkit for readiness probes
+  - 0.1.9 Make using selenium v4 syntax optional
 ...