[ci/tests] Temporary workaround for beforeunload event #902

Simulate gestures but is not enough.
Ref: https://chromium.googlesource.com/chromium/src/+/5b3168e8f8c4487320c654dd761622b89d548514.
Use chromium 125 for testing.
Added pip dependency caching.
I had to set CI to run on ubuntu-22.04, on ubuntu-24.04 the workaround did not work.

Related to #902

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ on:
 jobs:
   build:
     name: Python==${{ matrix.python-version }} | ${{ matrix.django-version }}
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-22.04
 
     services:
       redis:
@@ -50,6 +50,22 @@ jobs:
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
+        cache: 'pip'
+        cache-dependency-path: |
+          **/requirements*.txt
+
+    - uses: browser-actions/setup-chrome@v1
+      # Using a fixed version, see here for more information on why:
+      # https://github.com/openwisp/openwisp-controller/issues/902#issuecomment-2266219715
+      # TODO: find a solution to allow using recent versions
+      with:
+        chrome-version: 125
+        install-chromedriver: true
+      id: setup-chrome
+
+    - run: |
+        ${{ steps.setup-chrome.outputs.chrome-path }} --version
+        chromedriver --version
 
     - name: Install Dependencies
       id: deps
@@ -80,6 +96,7 @@ jobs:
         coverage xml
       env:
         SELENIUM_HEADLESS: 1
+        CHROME_BIN: ${{ steps.setup-chrome.outputs.chrome-path }}
 
     - name: Upload Coverage
       if: ${{ success() }}

openwisp_controller/config/tests/test_selenium.py

@@ -144,13 +144,21 @@ def test_unsaved_changes(self):
                 self.fail('Unsaved changes alert displayed without any change')
 
         with self.subTest('Alert should be displayed after making changes'):
+            # simulate hand gestures
+            self.web_driver.find_element(by=By.TAG_NAME, value='body').click()
+            self.web_driver.find_element(by=By.NAME, value='name').click()
+            # set name
             self.web_driver.find_element(by=By.NAME, value='name').send_keys(
                 'new.device.name'
             )
+            # simulate hand gestures
+            self.web_driver.find_element(by=By.TAG_NAME, value='body').click()
             self.web_driver.refresh()
             try:
                 WebDriverWait(self.web_driver, 1).until(EC.alert_is_present())
             except TimeoutException:
+                for entry in self.web_driver.get_log('browser'):
+                    print(entry)
                 self.fail('Timed out wating for unsaved changes alert')
             else:
                 alert = Alert(self.web_driver)