Add te to CI

.gitlab-ci.yml

@@ -3,6 +3,7 @@ image: python:3.10
 stages:
   - dependencies
   - lint
+  - test
 
 download_dependencies:
   stage: dependencies
@@ -26,3 +27,14 @@ pylint:
     - pip install pylint
   script:
     - pylint calculator --fail-on=error
+
+pytest:
+  stage: test
+  dependencies:
+    - download_dependencies
+  needs:
+    - download_dependencies
+  before_script:
+    - source .venv/bin/activate
+  script:
+    - pytest calculator