CI: Add code coverage

.github/workflows/tests_run.yml

@@ -35,11 +35,21 @@ jobs:
           post-cleanup: 'all'
           init-shell: bash
 
-      - name: Install httomolibgpu
+      - name: Install httomolibgpu & coverage tools
         run: |
+          sudo yum install -y git
           pip install .[dev]
+          pip install coverage
           micromamba list
 
       - name: Run tests
         run: |
-          pytest tests/
+          coverage run -m pytest tests/
+          coverage xml
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          name: Code Coverage
+          fail_ci_if_error: true

codecov.yml

@@ -0,0 +1,8 @@
+coverage:
+  status:
+    project:
+      default:
+        target: 90%
+comment:
+  layout: "header, diff, flags, files"
+  behavior: default