Fixes #8 test webdriver auto-detection/download

.github/workflows/build.yml

@@ -76,7 +76,14 @@ jobs:
 
     - name: run unit tests
       run: |
-        pdm run test
+        case "${{ matrix.os }}" in
+           ubuntu-*) 
+              sudo apt-get install -o Acquire::Retries=3 --no-install-recommends -y xvfb
+              xvfb-run pdm run test
+              ;;
+           *) pdm run test
+              ;;
+        esac
 
     - name: run kleinanzeigen_bot
       run: |

tests/test_selenium_mixin.py

@@ -0,0 +1,19 @@
+"""
+Copyright (C) 2022 Sebastian Thomschke and contributors
+SPDX-License-Identifier: AGPL-3.0-or-later
+"""
+from kleinanzeigen_bot.selenium_mixin import SeleniumMixin
+from kleinanzeigen_bot import utils
+
+
+def test_webdriver_auto_init():
+    selenium_mixin = SeleniumMixin()
+
+    chrome_type, chrome_version = selenium_mixin.get_browser_version_from_os()
+    utils.ensure(chrome_type is not None, "Chrome type not auto-detected")
+    utils.ensure(chrome_version is not None, "Chrome version not auto-detected")
+
+    utils.ensure(selenium_mixin.webdriver is None, "Web driver must not be set before create_webdriver_session()")
+    selenium_mixin.create_webdriver_session()
+    utils.ensure(selenium_mixin.webdriver is not None, "Web driver must be set after create_webdriver_session()")
+    selenium_mixin.webdriver.quit()