added test coverage checks

Author: anikolaienko

.coveragerc

@@ -0,0 +1,12 @@
+[run]
+branch = True
+omit =
+    */__init__.py
+    tests/*
+
+[report]
+show_missing = True
+fail_under = 94
+
+[html]
+directory = docs/coverage

.github/workflows/run_code_checks.yml

@@ -35,4 +35,7 @@ jobs:
         run: poetry run pre-commit run --all-files
 
       - name: Run unit tests
-        run: poetry run pytest tests/
+        run: poetry run coverage run pytest tests/
+
+      - name: Check unit test coverage
+        run: poetry run coverage report