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Resolve a measured sloping-ceiling depth to its ladder member 🟥

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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 13:48:15 +00:00
parent 870cb04631
commit a717ff7a99
1 changed files with 43 additions and 0 deletions
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43
tests/domain/epc/test_roof_sloping_ceiling_guard.py
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@ -40,3 +40,46 @@ def test_sloping_ceiling_without_a_depth_resolves_to_as_built(
# Assert
assert member is RoofType.PITCHED_SLOPING_CEILING_AS_BUILT
@pytest.mark.parametrize(
("description", "expected"),
[
# Exact tabulated depths → their own member.
("PitchedWithSlopingCeiling: 12mm", RoofType.PITCHED_SLOPING_CEILING_12MM),
("PitchedWithSlopingCeiling: 100mm", RoofType.PITCHED_SLOPING_CEILING_100MM),
("PitchedWithSlopingCeiling: 150 mm", RoofType.PITCHED_SLOPING_CEILING_150MM),
("PitchedWithSlopingCeiling: 270mm", RoofType.PITCHED_SLOPING_CEILING_270MM),
("PitchedWithSlopingCeiling: 400mm", RoofType.PITCHED_SLOPING_CEILING_400MM),
# Off-ladder depth snaps to the nearest tabulated depth ≤ N (mirrors the
# calculator's `_ROOF_BY_THICKNESS` picker), so nothing leaks to the LLM.
("PitchedWithSlopingCeiling: 130mm", RoofType.PITCHED_SLOPING_CEILING_125MM),
# Above 400 mm, or an explicit "400+" lodgement → the 400+ member.
("PitchedWithSlopingCeiling: 450mm", RoofType.PITCHED_SLOPING_CEILING_400_PLUS),
("PitchedWithSlopingCeiling: 400+mm", RoofType.PITCHED_SLOPING_CEILING_400_PLUS),
],
)
def test_sloping_ceiling_measured_depth_resolves_to_its_ladder_member(
description: str, expected: RoofType
) -> None:
# ADR-0066: a measured sloping-ceiling depth rides onto the matching ladder
# member (Table 17 col (1a)); off-ladder depths snap down; ≥ 400 / "400+"
# caps at the top member.
# Act
member = roof_sloping_ceiling_guard(description)
# Assert
assert member is expected
def test_sloping_ceiling_depth_below_the_ladder_falls_back_to_as_built() -> None:
# No member exists below 12 mm; a sub-ladder depth defers to `as built` (the
# age band drives it — uninsulated at old bands anyway), never inventing a
# member or leaking to the loft LLM route.
# Act
member = roof_sloping_ceiling_guard("PitchedWithSlopingCeiling: 5mm")
# Assert
assert member is RoofType.PITCHED_SLOPING_CEILING_AS_BUILT