Move unit tests into sub-dir and anchor them in the gitlab CI.

.gitlab-ci.yml

@@ -15,3 +15,5 @@ run_pre_commit_hooks:
     - apk add --repository https://dl-cdn.alpinelinux.org/alpine/edge/main rust cargo
     - python3 -m pip install pre-commit
     - pre-commit run --all-files
+    - pip install -r requirements.txt
+    - ./run_unit_tests

requirements.txt

+pyserde

run_unit_tests

+#!/usr/bin/env sh
+
+export PYTHONPATH=$(pwd):$PYTHONPATH
+python -m unittest unit_tests/test_*.py
\ No newline at end of file