fix(tests): various mistakes in workflow script

Squash commit for:

- fix: mistakes in workflow script
- fix: added openpyxl requirement needed for testing
- fix: update file path in unit test workflow
- add: files needed for tests
- fix: update file path in unit test workflow
- fix: update file path in unit test workflow
- fix: path update in unit test workflow

.github/workflows/unittest.yml

@@ -14,14 +14,14 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
-          pip install -r requirements.txt
-      - name: Analysing the code with pylint
-        run: python -m unittest src/tests/*.py
+          python3 -m pip install --upgrade pip
+          pip3 install -r requirements.txt
+      - name: Run unit tests on the code
+        run: python3 -m unittest ${GITHUB_WORKSPACE}/src/tests/*.py
       - name: Check test results
         run: |
-          test_result=$(python3 -m unittest src/tests/*.py |& grep "FAILED" | wc -w)
-          if (( $(echo "$result") == 0 )); then
+          test_result=$(python3 -m unittest ${GITHUB_WORKSPACE}/src/tests/*.py |& grep "FAILED" | wc -w)
+          if (( $(echo "$test_result") == 0 )); then
             echo "Tests passed. Commit approved."
           else
             echo "Tests failed. Blocking commit."

requirements.txt

@@ -3,3 +3,4 @@ scipy>=1.12.0
 matplotlib>=3.8.2
 pandas>=2.2.1
 seaborn>=0.13.2
+openpyxl>=3.1.2