Execute tests in CI

.gitlab-ci.yml

 stages:
   - lint
+  - test
 
 lint:
   stage: lint
   image: python:3.10-alpine
   before_script: pip install black
   script: black --check .
+
+test:
+  stage: test
+  image: python:3.10-alpine
+  before_script: 
+    - pip install poetry
+    - poetry install
+  script:
+    - poetry run python test/test.py