test/fixtures/external/beancount/example.beancount is vendored from upstream
(see SOURCE). It is test-only and not shipped in the Hex package.
test/beancount/reconciliation_test.exs exercises:
- bean-check - the fixture is valid Beancount.
- parse -> render -> bean-query - round-trip reports match the original.
- compare/3 - native engine equivalence on the full ledger (check + canned reports), including all balance assertions.
Golden fixtures (30/30) gate booking parity; the example ledger is the capstone for real-world scale.