Functions
	check (name, cond, *info)

	test_structural ()

	test_composed_conservation ()

	main ()

Variables
	ROOT = Path(__file__).resolve().parents[2]

int	ATOL = 1e-12

int	_fails = 0

Detailed Description

check_loop_conversion_integration.py — Phase-4 integration test.

Two parts:

  1. Structural — the full EUROFER-97 RAG builds with the ½⟨111⟩/⟨100⟩ split:
     3 populations, the three conversion edges present (unary INTER_POPULATION,
     junction + absorption COALESCENCE), and a SIA100 state-layout block.

  2. Conservation — all SIA-content-conserving edges (GROWTH, self-coalescence,
     junction, unary transformation, ⟨100⟩ absorption) run *together* through the
     GraphWalker on a minimal two-SIA-population RAG and conserve the total SIA
     content  Σ_n n·c_n^(111) + Σ_m m·c_m^(100).  This catches edge-interaction
     bugs that the per-edge Phase-1 tests cannot.

(The full EUROFER walker is not exercised directly: its P8 SOLUTE_TRAPPING edge
is owned by the He mean-loading reduction, not the discrete reference walker.)

Run:  python codes/Python_Testing/check_loop_conversion_integration.py