add test coverage to ci/cd workflow

Author: stuartasiimwe7

.github/workflows/ci-cd.yml

@@ -36,9 +36,17 @@ jobs:
         flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics --exclude=.venv,yolov5,data
         flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics --exclude=.venv,yolov5,data
     
-    - name: Run tests
+    - name: Run tests with coverage
       run: |
-        python -m pytest tests/ -v
+        python -m pytest tests/ -v --cov=src --cov-report=xml --cov-report=term-missing
+
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v4
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+        files: ./coverage.xml
+        fail_ci_if_error: true
+        verbose: true
 
   build-and-push:
     name: Build and Push Docker Image