Model/tests/domain/sap10_calculator
Jun-te Kim 5c11fd35c8 Validate SAP calculator vs Elmhurst; fix reduced-field window U; add accuracy harness
Reduced-field window U: heat_transmission derived the synthesised-window
raw U from u_window(all None) -> the 2.5 placeholder regardless of glazing.
Now routes the (uniform) glazing_type code through u_window (RdSAP Table 24)
so e.g. double pre-2002 reads 2.8, not 2.5. Only the pre-SAP10 reduced-field
path is affected (21.0.1 certs carry per-window U upstream) — the RdSAP-21.0.1
corpus gauge is unchanged at 66.9% within-0.5.

test_real_cert_sap_accuracy: pin uprn_10002468137 (RdSAP-17.1, all-electric
storage heaters) at SAP 61, validated against Elmhurst on identical inputs
(dual off-peak immersion, 110 L cylinder, 2 baths). Our engine reproduces
Elmhurst's fuel cost to the penny; lodged 55 is the old SAP-2012 schema.

Tooling to grow the accuracy corpus:
- scripts/fetch_real_life_epc_sample.py — capture a cert by UPRN into the corpus.
- scripts/compare_epc_paths.py — diff gov-API vs Elmhurst-summary EpcPropertyData
  and run both through the engine, localising mapper vs calculator differences.
- skill validate-cert-sap-accuracy — the end-to-end loop (capture -> Elmhurst
  inputs -> human builds -> compare -> reconcile -> pin in the test).
- skill epc-to-elmhurst-rdsap-inputs reference: corrected immersion (code 1=dual),
  cylinder size (code 2 = Normal/110 L), and bath-count (WWHRS sub-tab) mappings.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-15 15:26:11 +00:00
..
climate Move sap10_calculator tests to tests/domain/sap10_calculator/ for CI 2026-06-02 16:58:00 +00:00
rdsap fix(electric-heaters): code-699 "electric heaters assumed" bills Table 12a direct-acting split 2026-06-14 09:16:22 +00:00
validation Move sap10_calculator tests to tests/domain/sap10_calculator/ for CI 2026-06-02 16:58:00 +00:00
worksheet test(worksheet): pin simulated case 38 — mains-gas secondary reproduces worksheet exactly 2026-06-15 13:31:36 +00:00
__init__.py Move sap10_calculator tests to tests/domain/sap10_calculator/ for CI 2026-06-02 16:58:00 +00:00
test_bre_worked_examples.py Move sap10_calculator tests to tests/domain/sap10_calculator/ for CI 2026-06-02 16:58:00 +00:00
test_calculator.py feat(calculator): thread per-end-use fuel codes + PV export onto SapResult 2026-06-05 18:59:24 +00:00
test_pcdb_etl.py Move sap10_calculator tests to tests/domain/sap10_calculator/ for CI 2026-06-02 16:58:00 +00:00
test_pcdb_lookup.py Move sap10_calculator tests to tests/domain/sap10_calculator/ for CI 2026-06-02 16:58:00 +00:00
test_pcdb_table_322_lookup.py Move sap10_calculator tests to tests/domain/sap10_calculator/ for CI 2026-06-02 16:58:00 +00:00
test_pcdb_table_329_lookup.py Move sap10_calculator tests to tests/domain/sap10_calculator/ for CI 2026-06-02 16:58:00 +00:00
test_pcdb_table_362_lookup.py Move sap10_calculator tests to tests/domain/sap10_calculator/ for CI 2026-06-02 16:58:00 +00:00
test_postcode_weather.py Move sap10_calculator tests to tests/domain/sap10_calculator/ for CI 2026-06-02 16:58:00 +00:00
test_real_cert_sap_accuracy.py Validate SAP calculator vs Elmhurst; fix reduced-field window U; add accuracy harness 2026-06-15 15:26:11 +00:00
test_table_12.py Move sap10_calculator tests to tests/domain/sap10_calculator/ for CI 2026-06-02 16:58:00 +00:00
test_table_12a.py fix(tariff): Unknown meter + storage/CPSU main → off-peak (§12) 2026-06-06 19:02:34 +00:00
test_table_13.py fix(water-heating): 18-/24-hour immersion DHW bills 100% low-rate (Table 12a scope) 2026-06-10 22:01:35 +00:00
test_table_32.py Move sap10_calculator tests to tests/domain/sap10_calculator/ for CI 2026-06-02 16:58:00 +00:00