Removed one more utils reference in the README and fixed directory name

Signed-off-by: Carlo Costino <carlo.costino@gsa.gov>

tests/notifications_utils/test_request_id.py

@@ -0,0 +1,32 @@
+from notifications_utils import request_helper
+
+
+def test_request_id_is_set_on_response(app):
+    request_helper.init_app(app)
+    client = app.test_client()
+
+    with app.app_context():
+        response = client.get(
+            "/", headers={"X-B3-TraceId": "generated", "X-B3-SpanId": "generated"}
+        )
+        assert response.headers["X-B3-TraceId"] == "generated"
+        assert response.headers["X-B3-SpanId"] == "generated"
+
+
+def test_request_id_is_set_on_error_response(app):
+    request_helper.init_app(app)
+    client = app.test_client()
+    # turn off DEBUG so that the flask default error handler gets triggered
+    app.config["DEBUG"] = False
+
+    @app.route("/")
+    def error_route():
+        raise Exception()
+
+    with app.app_context():
+        response = client.get(
+            "/", headers={"X-B3-TraceId": "generated", "X-B3-SpanId": "generated"}
+        )
+        assert response.status_code == 500
+        assert response.headers["X-B3-TraceId"] == "generated"
+        assert response.headers["X-B3-SpanId"] == "generated"