Model/epc_data/tests/test_mainheat_attributes.py

import pytest
from epc_data.attributes.MainheatAttributes import MainHeatAttributes
from epc_data.tests.test_data.test_mainheat_attributes_cases import mainheat_cases


class TestMainHeatAttributes:

    def test_init(self):
        # Test initialization with a valid description
        valid_description = 'Room heaters, electric, Room heaters, mains gas'
        floor_attr = MainHeatAttributes(valid_description)
        assert floor_attr.description == valid_description.lower()

        # Test initialization with an empty description
        with pytest.raises(ValueError):
            MainHeatAttributes('')

        # Test initialization with a description that contains none of the keywords
        with pytest.raises(ValueError):
            MainHeatAttributes('description without keywords')

    def test_process_mainheat(self):
        for test_case in mainheat_cases:
            result = MainHeatAttributes(test_case['original_description']).process()
            # Ensure the output ordering is correct
            expected_result = {key: test_case[key] for key in result.keys()}
            expected_result["desc"] = test_case["original_description"]
            result["desc"] = test_case["original_description"]
            assert result == expected_result

    def test_invalid_description(self):
        # Test that invalid descriptions raise a ValueError
        invalid_descriptions = [
            "",
            "invalid description",
            "description with no known heating types",
        ]

        for description in invalid_descriptions:
            with pytest.raises(ValueError):
                MainHeatAttributes(description).process()