The old test_no_program_reproduces_greedy_output_unchanged only compared
building_program=None (default) vs explicit None — both through the new
_Placer code — so it proved the two None branches agree but did NOT pin
the greedy geometry; it would still pass if the _Placer extraction had
drifted the output. test_placement.py only checks invariants, never
concrete counts/TEAP, so there was no anti-regression guard that the
greedy path is byte-identical after the refactor.
Replace it with two tests:
- test_greedy_output_matches_golden_pin: hard-coded literals per strategy
on the fixed _BIG_PARCEL — (features, built_area_sqm, total_floor_area_sqm,
apartments_count) — frozen from the current (== pre-refactor) output, so
any future deterministic drift in greedy placement FAILS.
- test_explicit_none_program_equals_default_greedy: keeps the None-branch
equivalence check (default vs explicit None go one greedy path).