fin-hub/tests/test_exchange.py
tegwick 91d62f6430
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Implement FIN-WP-0006-T01 settlement statement join; mark FIN-WP-0004/0005 blocked
Add SettlementStatement schema and a dedicated settlement_statements store
(ingest_settlement_statement, current_settlement_statements) so
resource-control internal transfer settlements join as a referenced
projection without ever entering the booked-cost ledger. exchange_health
now surfaces a current statement with payment_recognition=unknown as a
settlement_awaiting_payment_join residual instead of booked cost. Adds
CLI commands finhub ledger ingest-settlement / settlements.

FIN-WP-0006-T01 is done; the workplan is finished.

Reviewed all other open workplans for closeable work: FIN-WP-0004's only
remaining task (T05) waits on an external provider fact from
resource-control, and every FIN-WP-0005 task waits on operator/Steuerbüro
confirmation or a non-production DATEV tenant. Neither has actionable
in-repo work right now, so both move to status: blocked.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Assistant: claude-code
Assistant-Model: sonnet
Assistant-Process: 242919@bnt-lap001
Assistant-Session: 286d235a-1654-40ff-b8fd-eee4e2ff9ea6
2026-09-27 21:51:09 +02:00

501 lines
17 KiB
Python

import json
from datetime import date, datetime, timezone
from decimal import Decimal
from pathlib import Path
import pytest
from pydantic import ValidationError
from fin_hub.models.engagement_price import EngagementPrice, _validate_engagement_price
from fin_hub.schemas.exchange import (
AllocationEvidence,
BookedCostEvidence,
ForecastEvidence,
)
from fin_hub.schemas.exchange import SettlementStatement
from fin_hub.services.exchange import (
booked_cost_projection,
current_settlement_statements,
exchange_health,
financial_constraint_projection,
ingest_planning_evidence,
ingest_resource_forecast,
ingest_resource_usage,
ingest_settlement_statement,
reconcile_resource_period,
)
from fin_hub.services.ledger import import_csv
def _common_planning() -> dict:
return {
"schema_version": "0.1",
"record_id": "forecast:platform-audit-storage:2026-08",
"revision_of": None,
"resource_id": "resource:platform_audit_storage",
"service_id": "object-storage",
"workload_id": "platform-pg",
"tenant_id": None,
"environment": "production",
"cost_attribution_key": "platform:audit-storage",
"period_start": "2026-09-01",
"period_end": "2027-08-31",
"currency": "eur",
"source_evidence": ["resource-control:data/forecasts/platform-audit-storage"],
"created_at": "2026-08-10T17:10:00Z",
}
def test_booked_cost_money_relationships_and_decimal_json():
record = BookedCostEvidence(
financial_fact_id="fact:1",
correction_of=None,
adjustment_kind="charge",
source_type="provider_invoice",
source_document_id="invoice:1",
source_line_id="invoice:1:line:1",
content_fingerprint="sha256:abc",
provider="provider",
accounting_period="2026-07",
currency="eur",
net_amount="10.005",
discount_amount="1.00",
tax_status="known",
tax_amount="1.90",
gross_amount="10.90",
adjustment_amount="0",
effective_amount="10.90",
source_evidence_ref="invoice:1",
recorded_at=datetime.now(timezone.utc),
)
assert record.net_amount == Decimal("10.00")
assert record.currency == "EUR"
assert '"gross_amount":"10.90"' in record.model_dump_json()
def test_booked_cost_rejects_invalid_relationships():
with pytest.raises(ValidationError, match="gross_amount"):
BookedCostEvidence(
financial_fact_id="fact:1",
adjustment_kind="charge",
source_type="invoice",
source_document_id="doc",
source_line_id="line",
content_fingerprint="hash",
provider="provider",
accounting_period="2026-07",
currency="EUR",
net_amount="10",
discount_amount="0",
tax_status="known",
tax_amount="1.90",
gross_amount="12",
effective_amount="12",
source_evidence_ref="doc",
recorded_at=datetime.now(timezone.utc),
)
def test_planning_forecast_is_typed_and_idempotent(tmp_path: Path):
payload = {
**_common_planning(),
"record_type": "forecast",
"scenario": "base",
"forecast_version": "2026-08-base",
"costs": {
"infrastructure": "2.89",
"internal_labor": "60",
"external_services": "0",
"setup": "0",
"other": "0",
},
"uncertainty": "provider price excludes unknown tax",
"assumptions": ["180 GB stored"],
}
ledger = tmp_path / "ledger.db"
first = ingest_planning_evidence(payload, ledger_path=ledger)
second = ingest_planning_evidence(payload, ledger_path=ledger)
assert isinstance(first, ForecastEvidence)
assert first.costs.total == Decimal("62.89")
assert second.record_id == first.record_id
def test_resource_control_backup_forecast_enters_planning_store(tmp_path: Path):
payload = {
"schema_version": "0.1",
"record_type": "forecast",
"workload": "platform-pg",
"cost_attribution_key": "platform:audit-storage",
"provider_id": "scaleway-standard-multi-az",
"created_at": "2026-08-10T17:10:00Z",
"scenario": "base",
"forecast_ref": None,
"rows": [
{
"period": "2026-09",
"database_gb": 5,
"stored_gb": 180,
"wal_gb": 30,
"restore_egress_gb": 5,
"write_requests": 2500,
"read_requests": 1000,
"infrastructure_eur": 2.89,
"internal_labor_hours": 1,
"internal_labor_eur": 60,
"total_eur": 62.89,
}
],
}
records = ingest_resource_forecast(
payload,
resource_id="resource:platform_audit_storage",
source_evidence_ref="resource-control:data/forecasts/platform-audit-storage",
ledger_path=tmp_path / "ledger.db",
)
assert len(records) == 1
assert isinstance(records[0], ForecastEvidence)
assert records[0].costs.total == Decimal("62.89")
def test_allocation_requires_shares_and_residual_to_reconcile():
payload = {
**_common_planning(),
"record_type": "allocation",
"record_id": "allocation:1",
"financial_fact_ids": ["fact:1"],
"method": "namespace-cpu-v1",
"allocated_amount": "10.00",
"shares": [{"target_key": "client:acme", "share": "0.75"}],
"residual_share": "0.20",
}
with pytest.raises(ValidationError, match="must equal 1"):
AllocationEvidence.model_validate(payload)
def test_booked_cost_projection_uses_current_corrected_fact(tmp_path: Path):
source = tmp_path / "cost.csv"
ledger = tmp_path / "ledger.db"
source.write_text(
"product,amount,currency,invoice_date,environment\n"
"Server,10.00,EUR,2026-07-01,production\n",
encoding="utf-8",
)
import_csv(source, "hosteurope", ledger_path=ledger)
source.write_text(
"product,amount,currency,invoice_date,environment\n"
"Server,12.00,EUR,2026-07-01,production\n",
encoding="utf-8",
)
import_csv(source, "hosteurope", ledger_path=ledger, force=True)
records = booked_cost_projection(ledger_path=ledger)
assert len(records) == 1
assert records[0].effective_amount == Decimal("12.00")
assert records[0].correction_of is not None
assert records[0].environment == "production"
def test_hosteurope_fact_joins_external_resource_by_stable_fact_id(tmp_path: Path):
source = tmp_path / "hosteurope.csv"
ledger = tmp_path / "ledger.db"
source.write_text(
"product,amount,currency,invoice_date,environment\n"
"Server,49.00,EUR,2026-07-01,production\n",
encoding="utf-8",
)
import_csv(source, "hosteurope", ledger_path=ledger)
fact = booked_cost_projection(ledger_path=ledger)[0]
joined = booked_cost_projection(
ledger_path=ledger,
fact_resource_ids={
fact.financial_fact_id: "resource:hosteurope:railiance01"
},
)
assert joined[0].resource_id == "resource:hosteurope:railiance01"
assert joined[0].provider == "hosteurope"
with pytest.raises(ValueError, match="unknown current financial facts"):
booked_cost_projection(
ledger_path=ledger,
fact_resource_ids={"fact:unknown": "resource:hosteurope:railiance01"},
)
def test_sqlalchemy_price_uses_shared_invariants():
price = EngagementPrice(
client_id="acme",
application_id="portal",
app_instance_id="prod-01",
cost_attribution_key="wrong",
effective_from=date(2026, 7, 1),
amount=Decimal("100.001"),
currency="eur",
source="agreement",
)
with pytest.raises(ValueError, match="does not match"):
_validate_engagement_price(None, None, price)
def test_financial_constraints_are_bounded_typed_and_idempotent():
kwargs = {
"domain_slug": "financials",
"period_start": date(2026, 8, 1),
"period_end": date(2026, 8, 31),
"currency": "eur",
"budget_ceiling": "100.00",
"active_commitment": "20.00",
"spent": "85.00",
"monthly_burn": "30.00",
"runway_months": "2.5",
"runway_threshold_months": "3",
"resource_id": "resource:hosteurope:railiance01",
"source_evidence": ("fin-hub:budget:2026-08", "fin-hub:runway:2026-08"),
"generated_at": datetime(2026, 8, 11, 13, 0, tzinfo=timezone.utc),
}
first = financial_constraint_projection(**kwargs)
second = financial_constraint_projection(**kwargs)
assert first == second
assert [signal.signal_kind for signal in first.signals] == [
"budget_ceiling",
"active_commitment",
"burn_pressure",
"runway_pressure",
]
assert first.signals[0].classification == "policy_constraint"
assert first.signals[2].classification == "informational_warning"
assert first.signals[3].metric_value == Decimal("2.5")
assert all(signal.currency == "EUR" for signal in first.signals)
assert "Not payment authority" in first.disclaimer
def test_financial_constraints_do_not_invent_missing_authoritative_values():
export = financial_constraint_projection(
domain_slug="financials",
period_start=date(2026, 8, 1),
period_end=date(2026, 8, 31),
currency="EUR",
source_evidence=("fin-hub:budget:none",),
generated_at=datetime(2026, 8, 11, 13, 0, tzinfo=timezone.utc),
)
assert export.signals == ()
def test_financial_constraint_rejects_invalid_period_or_unbounded_provenance():
with pytest.raises(ValueError, match="period_end"):
financial_constraint_projection(
domain_slug="financials",
period_start=date(2026, 9, 1),
period_end=date(2026, 8, 31),
currency="EUR",
source_evidence=("fin-hub:budget",),
)
with pytest.raises(ValueError, match="source_evidence"):
financial_constraint_projection(
domain_slug="financials",
period_start=date(2026, 8, 1),
period_end=date(2026, 8, 31),
currency="EUR",
source_evidence=(),
)
def test_exchange_health_exposes_rejection_stale_forecast_and_unattributed_cost(
tmp_path: Path,
):
ledger = tmp_path / "ledger.db"
source = tmp_path / "hosteurope.csv"
source.write_text(
"product,amount,currency,invoice_date,environment\n"
"Shared service,10.00,EUR,2026-07-01,production\n",
encoding="utf-8",
)
import_csv(source, "hosteurope", ledger_path=ledger)
stale = {
**_common_planning(),
"record_type": "forecast",
"record_id": "forecast:stale",
"period_start": "2026-01-01",
"period_end": "2026-01-31",
"scenario": "base",
"forecast_version": "v1",
"costs": {},
"assumptions": [],
}
ingest_planning_evidence(stale, ledger_path=ledger)
invalid = {**stale, "record_id": "forecast:rejected", "currency": "EURO"}
with pytest.raises(ValidationError):
ingest_planning_evidence(invalid, ledger_path=ledger)
with pytest.raises(ValidationError):
ingest_planning_evidence(invalid, ledger_path=ledger)
health = exchange_health(ledger_path=ledger, as_of=date(2026, 8, 11))
assert health.booked_fact_count == 1
assert health.current_planning_record_count == 1
assert health.rejected_delivery_count == 2
assert {issue.code for issue in health.issues} == {
"rejected_planning_delivery",
"stale_forecast",
"unattributed_booked_cost",
}
FIXTURES = Path(__file__).parent / "fixtures"
AUDIT_STORAGE = "resource:platform:audit-storage"
def test_audit_storage_usage_omits_nulls_and_does_not_invent_zero_spend(tmp_path: Path):
ledger = tmp_path / "ledger.db"
payload = json.loads(
(FIXTURES / "platform-audit-storage-usage-2026-08.json").read_text()
)
records = ingest_resource_usage(
payload,
resource_id=AUDIT_STORAGE,
source_evidence_ref="resource-control:data/actuals/2026-08.json",
ledger_path=ledger,
)
assert len(records) == 1
names = {measure.name: measure for measure in records[0].measures}
assert set(names) == {
"database_gb",
"stored_gb",
"backup_success_pct",
"restore_rto_minutes",
}
assert "infrastructure_eur" not in names
assert names["stored_gb"].value == Decimal("0.0066")
assert any("gap:infrastructure_eur" in item for item in records[0].source_evidence)
forecast = {
"schema_version": "0.1",
"record_type": "forecast",
"workload": "platform-pg",
"cost_attribution_key": "platform:audit-storage",
"provider_id": "scaleway-standard-multi-az",
"created_at": "2026-08-10T17:10:00Z",
"scenario": "base",
"forecast_ref": None,
"rows": [
{
"period": "2026-09",
"database_gb": 5,
"stored_gb": 180,
"wal_gb": 30,
"restore_egress_gb": 5,
"write_requests": 2500,
"read_requests": 1000,
"infrastructure_eur": 2.89,
"internal_labor_hours": 1,
"internal_labor_eur": 60,
"total_eur": 62.89,
}
],
}
ingest_resource_forecast(
forecast,
resource_id=AUDIT_STORAGE,
source_evidence_ref="resource-control:data/forecasts/platform-audit-storage",
ledger_path=ledger,
)
august = reconcile_resource_period(
resource_id=AUDIT_STORAGE, period="2026-08", ledger_path=ledger
)
assert august.usage_record_ids
assert august.missing_booked_fact is True
assert august.booked_effective_amount is None
assert august.invented_zero is False
health = exchange_health(ledger_path=ledger)
assert "usage_without_booked_fact" in {issue.code for issue in health.issues}
def _settlement_payload() -> dict:
return json.loads((FIXTURES / "settlement-statement-2026-08.json").read_text())
def test_settlement_statement_joins_as_referenced_projection_not_booked_cost(
tmp_path: Path,
):
ledger = tmp_path / "ledger.db"
payload = _settlement_payload()
statement = ingest_settlement_statement(
payload,
source_evidence_ref="resource-control:data/settlements/2026-08.json",
ledger_path=ledger,
)
assert isinstance(statement, SettlementStatement)
assert statement.financial_entity_id == "entity:frontier"
assert statement.outstanding_eur == Decimal("48.42")
assert statement.payment_recognition == "unknown"
current = current_settlement_statements(ledger_path=ledger)
assert len(current) == 1
assert current[0].statement_id() == statement.statement_id()
# No booked cost is created by joining a settlement statement.
assert booked_cost_projection(ledger_path=ledger) == []
def test_settlement_statement_is_idempotent_and_supersedes_prior_period_statement(
tmp_path: Path,
):
ledger = tmp_path / "ledger.db"
payload = _settlement_payload()
ingest_settlement_statement(
payload, source_evidence_ref="resource-control:data/settlements/2026-08.json",
ledger_path=ledger,
)
ingest_settlement_statement(
payload, source_evidence_ref="resource-control:data/settlements/2026-08.json",
ledger_path=ledger,
)
assert len(current_settlement_statements(ledger_path=ledger)) == 1
corrected = {**payload, "statement_date": "2026-09-05", "outstanding_eur": "10.00",
"new_transfer_charges_eur": "10.00", "known_transfer_price_eur": "10.00"}
ingest_settlement_statement(
corrected, source_evidence_ref="resource-control:data/settlements/2026-08-corrected.json",
ledger_path=ledger,
)
current = current_settlement_statements(ledger_path=ledger)
assert len(current) == 1
assert current[0].outstanding_eur == Decimal("10.00")
def test_settlement_statement_rejects_provider_invoice_shaped_payload(tmp_path: Path):
ledger = tmp_path / "ledger.db"
with pytest.raises(ValueError, match="record_type=settlement_statement"):
ingest_settlement_statement(
{"record_type": "booked_cost"},
source_evidence_ref="resource-control:x",
ledger_path=ledger,
)
def test_exchange_health_surfaces_settlement_without_payment_join_as_residual(
tmp_path: Path,
):
ledger = tmp_path / "ledger.db"
ingest_settlement_statement(
_settlement_payload(),
source_evidence_ref="resource-control:data/settlements/2026-08.json",
ledger_path=ledger,
)
health = exchange_health(ledger_path=ledger)
assert "settlement_awaiting_payment_join" in {issue.code for issue in health.issues}
assert health.booked_fact_count == 0