Use docker-in-docker to run tests

Cortesy @maisim.

This commit allow to use docker-in-docker to run tests.

Also it will run the tests on python version defined in the
PYTHON_VERSION array. The tox.ini file is not needed anymore.
Test locally can be run on the user python version, and check against
several python version will be done by the CI.

Notice the ODOO_RPC_URL environment variable which allow to mock the RPC
request to the right url.

This tests needs to be run on custom privileged runner.
! Using gitlab runner does not work !

.gitlab-ci.yml

@@ -15,24 +15,35 @@ pre-commit:
     - pre-commit run --all --show-diff-on-failure --verbose --color always
 
 pytest:
+  image:
+    name: python:$PYTHON_VERSION
   stage: test
   tags:
-    - shell
+    - cie-oow-dind-runner
   only:
     - merge_requests
     - "main"
+  services:
+    - name: docker:dind
+      alias: dind
+  variables:
+    ODOO_RPC_URL: dind
+    DOCKER_HOST: tcp://dind:2375/
+    DOCKER_DRIVER: overlay2
+    DOCKER_TLS_CERTDIR: ""
   coverage: '/TOTAL\s+\d+\s+\d+\s+(\d+)\%/'
-  script:
-    - python3 -m venv ./.gitlab-ci-venv
-    - source ./.gitlab-ci-venv/bin/activate
-    # - pip install --upgrade pip
+  before_script:
     - pip install poetry
-    - poetry --version
-    - poetry install -v
-    - echo $PATH
-    - echo $PYTHONPATH
-    - poetry run pytest --version
-    - poetry run pytest --verbosity=2 --exitfirst --cov odoo_openupgrade_wizard
+    - export PATH="$HOME/.local/bin:$PATH"
+    - poetry install --all-extras
+  script:
+    - poetry run pytest -vv -x --cov=odoo_openupgrade_wizard
+  parallel:
+    matrix:
+      - PYTHON_VERSION:
+        - "3.7"
+        - "3.8"
+        - "3.9"
 
 build:
   stage: build

tox.ini

@@ -1,10 +0,0 @@
-[tox]
-isolated_build = true
-skipsdist = True
-envlist = py36, py37, py38, py39
-
-[testenv]
-whitelist_externals = poetry
-commands =
-    poetry install -v
-    poetry run pytest -vv