Fix resolvers not updating properly when referencing other files.

Issue #893

Author: Wim-De-Clercq

openapi_core/validation/schemas/validators.py

@@ -38,8 +38,11 @@ def validate(self, value: Any) -> None:
     def evolve(self, schema: SchemaPath) -> "SchemaValidator":
         cls = self.__class__
 
-        with schema.open() as schema_dict:
-            return cls(schema, self.validator.evolve(schema=schema_dict))
+        with schema.resolve() as resolved:
+            validator = self.validator.evolve(
+                schema=resolved.contents, _resolver=resolved.resolver
+            )
+            return cls(schema, validator)
 
     def type_validator(
         self, value: Any, type_override: Optional[str] = None

tests/integration/validation/test_parent_reference.py

@@ -5,6 +5,7 @@
 
 from openapi_core import Config
 from openapi_core import OpenAPI
+from openapi_core import V30ResponseUnmarshaller
 from openapi_core.testing import MockRequest
 from openapi_core.testing import MockResponse
 
@@ -13,6 +14,13 @@ class TestParentReference:
 
     spec_path = "data/v3.0/parent-reference/openapi.yaml"
 
+    @pytest.fixture
+    def unmarshaller(self, content_factory):
+        content, base_uri = content_factory.from_file(self.spec_path)
+        return V30ResponseUnmarshaller(
+            spec=SchemaPath.from_dict(content, base_uri=base_uri)
+        )
+
     @pytest.fixture
     def openapi(self, content_factory):
         content, base_uri = content_factory.from_file(self.spec_path)
@@ -27,3 +35,11 @@ def test_valid(self, openapi):
         )
 
         openapi.validate_response(request, response)
+
+    def test_unmarshal(self, unmarshaller):
+        request = MockRequest(host_url="", method="GET", path="/books")
+        response = MockResponse(
+            data=json.dumps([{"id": "BOOK:01", "title": "Test Book"}]).encode()
+        )
+
+        unmarshaller.unmarshal(request, response)