fix!: Update validation test to follow documentation.

.cspell/custom-words.txt

@@ -1,81 +1,87 @@
 # cspell-specific custom words related to UCP
+absl
+absltest
+adyen
 Adyen
+agentic
 Alam
 Amex
 Ant
 Anytown
+atok
+backorder
 Backordered
 Braintree
 Carrefour
 Centricity
+checkout
 Chewy
 Commerce
-Credentialless
-Depot
-EWALLET
-Etsy
-Flipkart
-Gap
-GitHub
-Google
-Gpay
-Kroger
-Lowe's
-Macy's
-Mastercard
-Paymentech
-Paypal
-Preorders
-Queensway
-Sephora
-Shopify
-Shopee
-Stripe
-Target
-UCP
-Ulta
-Visa
-Wayfair
-Worldpay
-Zalando
-absl
-absltest
-adyen
-agentic
-atok
-backorder
-checkout
-credentialless
 credentialization
+credentialless
+Credentialless≈
+cust
 datamodel
+Depot
 dpan
+Etsy
 ewallet
+EWALLET
+Flipkart
 fontawesome
 fpan
 fulfillable
+Gap
+GitHub
+Google
 gpay
+Gpay
 healthz
 ingestions
 inlinehilite
+Kroger
 linenums
 llmstxt
+Lowe's
+Macy's
+Malform
 mastercard
+Mastercard
 mkdocs
 mtok
 openapi
 openrpc
+Paymentech
 paypal
+Paypal
 permissionless
 preorders
+Preorders
 proto
 protobuf
 pymdownx
+Queensway
 renderable
 repudiable
 schemas
 sdjwt
+Sephora
+Shopee
 shopify
+Shopify
+Smallville
+Stripe
 superfences
+Target
+UCP
+Ulta
+Villagetown
+Visa
 vulnz
+Wayfair
+Worldpay
+wumpus
+Wumpus
 yaml
 yml
+Zalando

idempotency_test.py

@@ -110,13 +110,11 @@ def test_idempotency_update(self) -> None:
     # We construct the update payload same as helper does
     line_items_req = []
     for li in checkout_obj.line_items:
-      line_items_req.append(
-        {
-          "item": {"id": li.item.id, "title": li.item.title},
-          "quantity": 2,  # Change quantity
-          "id": li.id,
-        }
-      )
+      line_items_req.append({
+        "item": {"id": li.item.id, "title": li.item.title},
+        "quantity": 2,  # Change quantity
+        "id": li.id,
+      })
 
     payment_req = {
       "selected_instrument_id": checkout_obj.payment.selected_instrument_id,

integration_test_utils.py

@@ -558,6 +558,55 @@ def assert_response_status(
       ),
     )
 
+  def assert_checkout_status(
+    self,
+    checkout_data: dict[str, Any],
+    expected_status: str = "incomplete",
+    valid_path_matchers: list[str] | None = None,
+    model_class: Any = None,
+  ) -> Any:
+    """Assert checkout status and optionally verify error paths using Pydantic."""
+    if model_class is None:
+      # Use a more permissive model that only requires status and messages for errors
+      from pydantic import BaseModel
+      from ucp_sdk.models.schemas.shopping.types import message
+
+      class BasicErrorResponse(BaseModel):
+        status: str
+        messages: list[message.Message] | None = None
+
+      model_class = BasicErrorResponse
+
+    checkout_obj = model_class(**checkout_data)
+
+    self.assertEqual(
+      checkout_obj.status,
+      expected_status,
+      msg=f"Expected checkout status '{expected_status}', got '{checkout_obj.status}'.",
+    )
+
+    if valid_path_matchers:
+      # Extract error messages from the Pydantic model
+      error_messages = [
+        msg.root
+        for msg in (checkout_obj.messages or [])
+        if getattr(msg.root, "type", None) == "error"
+      ]
+
+      error_paths = [getattr(m, "path", "") for m in error_messages]
+
+      matches = any(
+        any(path == matcher for matcher in valid_path_matchers)
+        for path in error_paths
+      )
+
+      self.assertTrue(
+        matches,
+        f"Expected error path matching one of {valid_path_matchers}. Paths found: {error_paths}",
+      )
+
+    return checkout_obj
+
   def create_checkout_session(
     self,
     quantity: int = 1,

protocol_test.py

@@ -56,9 +56,10 @@ def _extract_document_urls(
       if service.mcp and service.mcp.schema_:
         urls.add((f"{base_path}.mcp.schema", str(service.mcp.schema_)))
       if service.embedded and service.embedded.schema_:
-        urls.add(
-          (f"{base_path}.embedded.schema", str(service.embedded.schema_))
-        )
+        urls.add((
+          f"{base_path}.embedded.schema",
+          str(service.embedded.schema_),
+        ))
 
     # 2. Capabilities
     for i, cap in enumerate(profile.ucp.capabilities):

pyproject.toml

@@ -45,6 +45,8 @@ docstring-code-format = true
 [tool.ruff.lint]
 select = ["E", "F", "W", "B", "C4", "SIM", "N", "UP", "D", "PTH", "T20"]
 ignore = ["D203", "D213"]
+# Don't fail on lines ruff format can't fix
+ignore = ["E501"] 
 
 [tool.ruff.lint.isort]
 combine-as-imports = true