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111 lines
3.5 KiB
Python
111 lines
3.5 KiB
Python
"""The Landlord-Override water-heating → heating Simulation Overlay mapping.
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A water-heating value resolves to the SAP `water_heating_code` (system) and
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`water_heating_fuel` the calculator reads; the overlay is whole-dwelling.
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"""
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from __future__ import annotations
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import pytest
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from domain.epc.property_overlays.water_heating_overlay import (
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water_heating_overlay_for,
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)
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from domain.epc.property_overrides.water_heating_type import WaterHeatingType
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from domain.modelling.scoring.overlay_applicator import apply_simulations
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from tests.domain.sap10_calculator.worksheet._elmhurst_worksheet_000490 import (
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build_epc,
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)
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def test_from_main_system_mains_gas_overlays_water_heating() -> None:
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# Act
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simulation = water_heating_overlay_for("From main system, mains gas", 0)
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# Assert — "from main system" is water_heating_code 901, mains gas fuel 26.
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assert simulation is not None
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assert simulation.heating is not None
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assert simulation.heating.water_heating_code == 901
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assert simulation.heating.water_heating_fuel == 26
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@pytest.mark.parametrize(
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("water_heating_value", "code", "fuel"),
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[
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("From main system, electricity", 901, 29),
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("Electric immersion, electricity", 903, 29),
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],
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)
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def test_water_heating_systems_decode_to_their_codes(
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water_heating_value: str, code: int, fuel: int
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) -> None:
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# Act
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simulation = water_heating_overlay_for(water_heating_value, 0)
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# Assert
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assert simulation is not None
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assert simulation.heating is not None
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assert simulation.heating.water_heating_code == code
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assert simulation.heating.water_heating_fuel == fuel
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@pytest.mark.parametrize(
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("water_heating_value", "code", "fuel"),
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[
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("From main system, oil", 901, 28),
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("From main system, LPG (bulk)", 901, 27),
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("From main system, bottled LPG", 901, 3),
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("From main system, house coal", 901, 33),
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# "boiler/circulator for water heating only" is SAP Table 4a code 911.
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("Gas boiler/circulator, mains gas", 911, 26),
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],
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)
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def test_more_water_heating_combos_decode_to_their_codes(
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water_heating_value: str, code: int, fuel: int
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) -> None:
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# Act
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simulation = water_heating_overlay_for(water_heating_value, 0)
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# Assert
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assert simulation is not None
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assert simulation.heating is not None
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assert simulation.heating.water_heating_code == code
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assert simulation.heating.water_heating_fuel == fuel
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@pytest.mark.parametrize("water_heating_value", ["Unknown", ""])
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def test_unresolvable_water_heating_produces_no_overlay(
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water_heating_value: str,
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) -> None:
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# Act
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simulation = water_heating_overlay_for(water_heating_value, 0)
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# Assert
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assert simulation is None
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def test_water_heating_override_remaps_the_hot_water_arrangement() -> None:
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# Arrange — landlord correction: HW is a separate electric immersion.
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baseline = build_epc()
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overlay = water_heating_overlay_for("Electric immersion, electricity", 0)
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assert overlay is not None
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# Act
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result = apply_simulations(baseline, [overlay])
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# Assert — the calculator reads these off sap_heating.
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assert result.sap_heating.water_heating_code == 903
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assert result.sap_heating.water_heating_fuel == 29
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@pytest.mark.parametrize(
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"member", [m for m in WaterHeatingType if m is not WaterHeatingType.UNKNOWN]
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)
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def test_every_resolvable_water_heating_value_decodes(
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member: WaterHeatingType,
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) -> None:
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# Act
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simulation = water_heating_overlay_for(member.value, 0)
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# Assert
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assert simulation is not None
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