Implement Stripe publication layer and close WP-0007

projects/coulomb-pricing/tests/test_api.py

@@ -30,6 +30,9 @@ def test_dashboard_payload_contains_live_ledger_totals() -> None:
     assert payload["pricing_simulations"]["reference_model_id"] is not None
     assert payload["customer_tuning"]["request_count"] == 2
     assert payload["customer_tuning"]["accepted_request_ids"] == ["small-team-lower-usage-price"]
+    assert payload["provider_publication"]["provider"] == "stripe"
+    assert payload["provider_publication"]["model_id"] == "flat-899-eur-monthly"
+    assert payload["provider_publication"]["plan"]["summary"].startswith("stripe:")
     assert len(payload["boundary_validation"]["model_results"]) == 3
     assert payload["boundary_validation"]["policy"]["target_margin_pct"] == "15"
     assert any(

projects/coulomb-pricing/tests/test_publication.py

@@ -0,0 +1,124 @@
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+from observatory.load import load_pricing_models, load_product
+from observatory.publication import (
+    build_stripe_publication_preview,
+    publish_to_stripe_shadow,
+    rollback_stripe_shadow,
+)
+
+DATA_DIR = Path(__file__).resolve().parent.parent / "data"
+
+
+def _catalog():
+    return load_product(DATA_DIR), load_pricing_models(DATA_DIR)
+
+
+def test_overage_preview_includes_meter_and_approximate_mapping(tmp_path: Path) -> None:
+    product, models = _catalog()
+    preview = build_stripe_publication_preview(
+        product,
+        models,
+        DATA_DIR,
+        model_id="membership-plus-overage",
+        state_path=tmp_path / "stripe-state.json",
+    )
+
+    assert preview["artifact_counts"]["exact"] >= 3
+    assert preview["artifact_counts"]["approximate"] >= 1
+    assert preview["artifact_counts"]["unsupported"] == 0
+    assert any(
+        operation["provider_object_type"] == "billing_meter"
+        for operation in preview["plan"]["operations"]
+    )
+
+
+def test_credit_allowance_preview_marks_unsupported_usage_mapping(tmp_path: Path) -> None:
+    product, models = _catalog()
+    preview = build_stripe_publication_preview(
+        product,
+        models,
+        DATA_DIR,
+        model_id="membership-plus-credits",
+        state_path=tmp_path / "stripe-state.json",
+    )
+
+    unsupported = {
+        artifact["source_key"]
+        for artifact in preview["plan"]["unsupported_artifacts"]
+    }
+    assert "price:membership-plus-credits:ai-credit-allowance" in unsupported
+    assert preview["artifact_counts"]["unsupported"] >= 1
+
+
+def test_publication_is_idempotent_and_detects_drift(tmp_path: Path) -> None:
+    product, models = _catalog()
+    state_path = tmp_path / "stripe-state.json"
+
+    publish_to_stripe_shadow(
+        product,
+        models,
+        DATA_DIR,
+        model_id="flat-899-eur-monthly",
+        state_path=state_path,
+    )
+    preview = build_stripe_publication_preview(
+        product,
+        models,
+        DATA_DIR,
+        model_id="flat-899-eur-monthly",
+        state_path=state_path,
+    )
+
+    assert {operation["kind"] for operation in preview["plan"]["operations"]} == {"noop"}
+
+    raw_state = json.loads(state_path.read_text(encoding="utf-8"))
+    price_artifact = next(
+        artifact
+        for artifact in raw_state["artifacts"]
+        if artifact["provider_id"] == "price--flat-899-eur-monthly--membership-access"
+    )
+    price_artifact["payload"]["unit_amount_decimal"] = "9.49"
+    state_path.write_text(json.dumps(raw_state, indent=2), encoding="utf-8")
+
+    drifted = build_stripe_publication_preview(
+        product,
+        models,
+        DATA_DIR,
+        model_id="flat-899-eur-monthly",
+        state_path=state_path,
+    )
+
+    assert drifted["plan"]["drift"]
+    assert any(operation["kind"] == "update" for operation in drifted["plan"]["operations"])
+
+
+def test_publication_rollback_restores_prior_revision(tmp_path: Path) -> None:
+    product, models = _catalog()
+    state_path = tmp_path / "stripe-state.json"
+
+    first = publish_to_stripe_shadow(
+        product,
+        models,
+        DATA_DIR,
+        model_id="flat-899-eur-monthly",
+        state_path=state_path,
+    )
+    publish_to_stripe_shadow(
+        product,
+        models,
+        DATA_DIR,
+        model_id="membership-plus-overage",
+        state_path=state_path,
+    )
+    rollback = rollback_stripe_shadow(
+        DATA_DIR,
+        first["result"]["revision"]["revision_id"],
+        state_path=state_path,
+    )
+
+    assert rollback["result"]["state"]["active_model_id"] == "flat-899-eur-monthly"
+    assert rollback["result"]["revision"]["summary"].startswith("Rolled back")