test: check validation function of PlaneEmissionParameters

tests/unit/test_parameters.py

@@ -0,0 +1,14 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""Test pydantic models in parameters.py"""
+
+from co2calculator import TransportationMode
+from co2calculator.parameters import PlaneEmissionParameters
+import pytest
+from pydantic import ValidationError
+
+
+def test_planeemissionparameter_raise_validation_error():
+    """Tests that PlaneEmissionParameters raises a validation error when an invalid seating is provided."""
+    with pytest.raises(ValidationError):
+        PlaneEmissionParameters(subcategory=TransportationMode.PLANE, seating="INVALID")