[CI] Introduce Selenium tests against Docker

.gitlab-ci.yml

@@ -62,19 +62,26 @@ build_docker:
        --cache=true
        --cleanup
 
-test_docker:
+test_docker_selenium:
   stage: test_integrated
   image:
-    name: debian:buster-slim
+    name: registry.edugit.org/teckids/docker-images/python-pimped:master
   services:
     - name: postgres:12
       alias: db
-    - name: memcached:latest
+    - name: memcached
       alias: memcached
     - name: registry.edugit.org/biscuit/biscuit-ng:${CI_COMMIT_REF_NAME}
       alias: app
+  before_script:
+    - apt-get -y update && eatmydata apt-get -y install chromium-driver
+    - eatmydata pip install selenium pytest-selenium
+    - adduser --disabled-password --gecos "Test User" testuser
   script:
-    - echo true
+    - sudo -u testuser eatmydata tox -e selenium
+  artifacts:
+    paths:
+      - screenshots/
 
 deploy_demo-master:
   stage: deploy

biscuit/core/tests/browser/test_selenium.py

+import sys
+
+import pytest
+
+if '--driver' not in sys.argv:
+    pytest.skip('Selenium driver not configured', allow_module_level=True)
+
+@pytest.fixture
+def chrome_options(chrome_options):
+    chrome_options.add_argument('--headless')
+    chrome_options.add_argument('--no-sandbox')
+    chrome_options.add_argument('--disable-dev-shm-usage')
+    return chrome_options
+
+def test_index(selenium):
+    selenium.get('http://app:8000/')
+    selenium.save_screenshot('screenshots/index.png')

tox.ini

 [tox]
 skipsdist = True
+envlist = default
 
-[testenv]
+[testenv:default]
 whitelist_externals = poetry
     pytest
 skip_install = true
-commands = pytest --pylama --cov=biscuit biscuit/core/
+commands = pytest -p no:selenium --pylama --cov=biscuit biscuit/core/
+
+[testenv:selenium]
+whitelist_externals = poetry
+    pytest
+skip_install = true
+commands = pytest --driver {env:SELENIUM_DRIVER:Chrome} biscuit/core/
 
 [pylama]
 linters = pycodestyle,pyflakes,radon