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d559298de2
The fuel codes the calculator now puts on SapResult are its own codes — raw gov-API enums or already-Table-32, depending on the source mapper (ADR-0015). sap_code_to_fuel now runs the code through table_32.to_table_32_code (promoted from private _to_table_32_code) — T32-first, then API-translate, the SAME normalization the calculator's pricing/CO2 helpers use — before the Table-32 -> Fuel dispatch, so the bill's carrier matches what the calculator billed (incl. the API/T32 collision codes, e.g. 20 = wood-logs not heat-net). Falls back to the raw code for billing fuels the price table omits (the 41-58 heat-network range), which resolve to HEAT_NETWORK -> UnpricedFuel — stricter than, and intentionally divergent from, the calculator's lossy default-to-mains-gas for an unpriced code (ADR-0014 §5). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
58 lines
2 KiB
Python
58 lines
2 KiB
Python
from __future__ import annotations
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import pytest
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from domain.fuel_rates.fuel import Fuel
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from domain.property_baseline.sap_fuel import sap_code_to_fuel
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from domain.sap10_calculator.exceptions import UnmappedSapCode
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def test_mains_gas_code_maps_to_mains_gas() -> None:
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# Arrange / Act / Assert — Table 32 code 1 is mains gas.
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assert sap_code_to_fuel(1) == Fuel.MAINS_GAS
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@pytest.mark.parametrize(
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("code", "fuel"),
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[
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(1, Fuel.MAINS_GAS),
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(2, Fuel.LPG),
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(4, Fuel.OIL),
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(76, Fuel.OIL), # bioethanol — a liquid fuel row
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(11, Fuel.COAL), # house coal
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(15, Fuel.COAL), # anthracite
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(12, Fuel.SMOKELESS),
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(20, Fuel.WOOD_LOGS),
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(23, Fuel.WOOD_PELLETS),
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(30, Fuel.ELECTRICITY), # standard tariff
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(32, Fuel.ELECTRICITY_OFF_PEAK), # 7-hour tariff
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(41, Fuel.HEAT_NETWORK), # heat from electric heat pump (community)
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(50, Fuel.HEAT_NETWORK), # electricity for distribution pumping
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],
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)
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def test_table_32_codes_map_to_their_billing_fuel(code: int, fuel: Fuel) -> None:
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# Arrange / Act / Assert
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assert sap_code_to_fuel(code) == fuel
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@pytest.mark.parametrize(
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("api_code", "fuel"),
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[
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(26, Fuel.MAINS_GAS), # gov-API mains-gas enum -> Table 32 code 1
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(0, Fuel.ELECTRICITY), # API "electricity" -> Table 32 code 30
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(25, Fuel.HEAT_NETWORK), # API community heat -> Table 32 code 41
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(14, Fuel.COAL), # API house coal -> Table 32 code 11
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],
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)
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def test_raw_api_fuel_codes_normalize_before_mapping(api_code: int, fuel: Fuel) -> None:
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# Arrange — the calculator may carry a raw gov-API fuel code (not yet a Table
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# 32 code); sap_code_to_fuel normalizes via the calculator's own helper first.
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# Act / Assert
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assert sap_code_to_fuel(api_code) == fuel
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def test_an_unmapped_code_raises_rather_than_guessing() -> None:
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# Arrange — code 10 (dual fuel) has no single billing fuel.
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# Act / Assert
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with pytest.raises(UnmappedSapCode):
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sap_code_to_fuel(10)
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