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106 lines
3.4 KiB
Python
106 lines
3.4 KiB
Python
"""The Landlord-Override glazing → glazing Simulation Overlay mapping.
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A glazing value resolves to the SAP10 `glazing_type` code the calculator's
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Table-24 cascade reads; the overlay is whole-dwelling (expanded across every
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window by `_fold_glazing`).
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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_overrides.glazing_type import GlazingType
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from domain.epc.property_overlays.glazing_overlay import glazing_overlay_for
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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_double_glazing_post_2002_overlays_its_glazing_code() -> None:
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# Act
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simulation = glazing_overlay_for("Double glazing, 2002 or later", 0)
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# Assert — double glazing 2002-2021 is SAP10 glazing_type code 2.
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assert simulation is not None
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assert simulation.glazing is not None
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assert simulation.glazing.glazing_type == 2
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@pytest.mark.parametrize(
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("glazing_value", "code"),
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[
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("Single glazing", 1),
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("Double glazing, pre-2002", 3),
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("Triple glazing, 2002 or later", 9),
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("Triple glazing, pre-2002", 6),
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],
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)
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def test_glazing_types_decode_to_their_sap_codes(
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glazing_value: str, code: int
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) -> None:
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# Act
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simulation = glazing_overlay_for(glazing_value, 0)
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# Assert
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assert simulation is not None
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assert simulation.glazing is not None
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assert simulation.glazing.glazing_type == code
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@pytest.mark.parametrize("glazing_value", ["Unknown", ""])
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def test_unresolvable_glazing_produces_no_overlay(glazing_value: str) -> None:
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# Act
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simulation = glazing_overlay_for(glazing_value, 0)
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# Assert
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assert simulation is None
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def test_a_glazing_mix_produces_no_overlay_so_the_cert_is_kept() -> None:
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# A MIXED aggregate resolves to no overlay: a whole-dwelling proportion cannot
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# say which windows are which, so the cert's per-window `sap_windows` are kept
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# rather than flattened to one type (ADR-0042 amendment, #1376).
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# Act
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simulation = glazing_overlay_for(GlazingType.MIXED.value, 0)
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# Assert
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assert simulation is None
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def test_glazing_override_remaps_every_window_and_clears_lodged_u() -> None:
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# Arrange — baseline windows are double glazed (code 2, lodged U 2.8); the
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# landlord corrects the whole dwelling to single glazing.
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baseline = build_epc()
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assert len(baseline.sap_windows) > 1
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overlay = glazing_overlay_for("Single glazing", 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 — every window flips to single (code 1) and its lodged transmission
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# U is cleared so the Table-24 cascade re-derives U from the new type.
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assert all(w.glazing_type == 1 for w in result.sap_windows)
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assert all(w.window_transmission_details is None for w in result.sap_windows)
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_NO_OVERLAY_SENTINELS = {GlazingType.UNKNOWN, GlazingType.MIXED}
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@pytest.mark.parametrize(
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"member", [m for m in GlazingType if m not in _NO_OVERLAY_SENTINELS]
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)
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def test_every_resolvable_glazing_value_decodes_to_a_code(
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member: GlazingType,
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) -> None:
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# A classifier emits a GlazingType value; if the overlay can't decode it the
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# override silently no-ops. Every member except the deliberate no-overlay
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# sentinels (UNKNOWN, MIXED) must resolve to a code.
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# Act
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simulation = glazing_overlay_for(member.value, 0)
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# Assert
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assert simulation is not None
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