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Carry the sloping-ceiling insulation depth into the overlay 🟥

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Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Khalim Conn-Kowlessar 2026-07-23 13:26:19 +00:00
parent 9cccf83000
commit b6172987bd
1 changed files with 40 additions and 0 deletions
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40
tests/domain/epc/test_roof_type_overlay.py
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@ -160,6 +160,46 @@ def test_pitched_unknown_loft_drives_the_pitched_age_band_default() -> None:
assert overlay.roof_insulation_thickness is None
_SLOPING_CEILING_THICKNESS_MEMBERS: list[tuple[RoofType, int]] = [
(RoofType.PITCHED_SLOPING_CEILING_12MM, 12),
(RoofType.PITCHED_SLOPING_CEILING_25MM, 25),
(RoofType.PITCHED_SLOPING_CEILING_50MM, 50),
(RoofType.PITCHED_SLOPING_CEILING_75MM, 75),
(RoofType.PITCHED_SLOPING_CEILING_100MM, 100),
(RoofType.PITCHED_SLOPING_CEILING_125MM, 125),
(RoofType.PITCHED_SLOPING_CEILING_150MM, 150),
(RoofType.PITCHED_SLOPING_CEILING_175MM, 175),
(RoofType.PITCHED_SLOPING_CEILING_200MM, 200),
(RoofType.PITCHED_SLOPING_CEILING_225MM, 225),
(RoofType.PITCHED_SLOPING_CEILING_250MM, 250),
(RoofType.PITCHED_SLOPING_CEILING_270MM, 270),
(RoofType.PITCHED_SLOPING_CEILING_300MM, 300),
(RoofType.PITCHED_SLOPING_CEILING_350MM, 350),
(RoofType.PITCHED_SLOPING_CEILING_400MM, 400),
(RoofType.PITCHED_SLOPING_CEILING_400_PLUS, 400),
]
@pytest.mark.parametrize(("member", "expected_mm"), _SLOPING_CEILING_THICKNESS_MEMBERS)
def test_every_sloping_ceiling_thickness_member_carries_its_depth(
member: RoofType, expected_mm: int
) -> None:
# ADR-0066: a known-depth sloping ceiling scores on Table 17 col (1a)
# "insulated slope" — the depth must reach the overlay (via
# `roof_insulation_thickness`) alongside the sloping-ceiling shape, so a
# landlord-stored member scores its slope, not the age-band default. `400+`
# carries 400 (the top tabulated row).
# Act
simulation = roof_overlay_for(member.value, 0)
# Assert
assert simulation is not None
overlay = simulation.building_parts[BuildingPartIdentifier.MAIN]
assert overlay.roof_construction_type == "Pitched, sloping ceiling"
assert overlay.roof_insulation_thickness == expected_mm
def test_sloping_ceiling_as_built_defers_to_the_age_band_default() -> None:
# ADR-0066: a pitched sloping ceiling has no loft void, so "as built" defers
# the U-value to the construction age band (Table 18 col (3) via the