make test_add fail

.github/workflows/ci_cd_wf.yml

@@ -27,3 +27,12 @@ jobs:
       - name: Run tests
         run: |
           python -m pytest -v tests
+
+      - name: Build coverage file
+        run: |
+          pytest --cov-report=term-missing:skip-covered --cov=. | tee pytest-coverage.txt
+
+      - name: Pytest coverage comment
+        uses: MishaKav/pytest-coverage-comment@main
+        with:
+          pytest-coverage-path: ./pytest-coverage.txt

requirements.txt

@@ -5,3 +5,4 @@ packaging==23.1
 pluggy==1.0.0
 pytest==7.3.1
 tomli==2.0.1
+pytest-cov

tests/test_calculator.py

@@ -0,0 +1,17 @@
+from calculator import add, div, mul, sub
+
+
+def test_add():
+    assert add(1, 1) == 2
+
+
+def test_sub():
+    assert sub(1, 1) == 0
+
+
+def test_mul():
+    assert mul(1, 1) == 1
+
+
+def test_div():
+    assert div(2, 1) == 2