add tests infrastructure

Jenkinsfile

@@ -2,7 +2,20 @@
 
 pipeline {
     agent any
+    options {
+        disableConcurrentBuilds()
+    }
     stages {
+        stage('Unit Tests') {
+            steps {
+                sh 'tox -rv'
+            }
+            post {
+                always {
+                    mergeJunitResults()
+                }
+            }
+        }
         stage('Packaging') {
             steps {
                 script {

tests/settings.py

@@ -0,0 +1,14 @@
+import os
+
+
+INSTALLED_APPS += ('combo_plugin_nanterre',)
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.postgresql_psycopg2',
+        'TEST': {
+            'NAME': 'combo-plugin-nanterre-test-%s'
+            % os.environ.get("BRANCH_NAME", "").replace('/', '-')[:40],
+        },
+    }
+}

tests/test_nanterre.py

@@ -0,0 +1,15 @@
+import django_webtest
+import pytest
+
+
+@pytest.fixture
+def app(request, db):
+    wtm = django_webtest.WebTestMixin()
+    wtm._patch_settings()
+    yield django_webtest.DjangoTestApp()
+    wtm._unpatch_settings()
+
+
+def test_url(app):
+    resp = app.get('/_plugin/nanterre/saga-retour-asynchrone/')
+    assert resp.json == {'err': 1}

tox.ini

@@ -0,0 +1,31 @@
+[tox]
+envlist = py3-black-pytest-coverage
+toxworkdir = {env:TMPDIR:/tmp}/tox-{env:USER}/combo-plugin-nanterre/{env:BRANCH_NAME:}
+
+[testenv]
+usedevelop =
+  coverage: True
+  nocoverage: False
+setenv =
+  DJANGO_SETTINGS_MODULE=combo.settings
+  COMBO_SETTINGS_FILE=tests/settings.py
+  DB_ENGINE=django.db.backends.postgresql_psycopg2
+  SETUPTOOLS_USE_DISTUTILS=stdlib
+  coverage: COVERAGE=--cov-report xml --cov-report html --cov=combo_plugin_nanterre/
+  pytest: PYTEST=--junitxml=junit-{envname}.xml
+deps =
+  pytest
+  pytest-cov
+  pytest-django
+  WebTest
+  django-webtest
+  psycopg2-binary
+  psycopg2
+  django-ratelimit<3
+  django>=2.2,<2.3
+  git+https://git.entrouvert.org/debian/django-ckeditor.git
+  git+https://git.entrouvert.org/combo.git
+  black: pre-commit
+commands =
+  pytest: py.test {posargs: {env:PYTEST:} {env:COVERAGE:} tests/}
+  black: pre-commit run black --all-files --show-diff-on-failure