Add test_app.py

test_app.py

@@ -0,0 +1,13 @@
+#test_app.py
+import pytest
+from app import app
+
+@pytest.fixture
+def client():
+    app.testing = True
+    return app.test_client()
+
+def test_home(client):
+    response = client.get("/")
+    assert response.status_code == 200
+    assert response.data == b"Hello, Jenkins Pipeline with Python!"