fix: Internal error when YAML payload definition contains nested bina…

…ry format

Signed-off-by: Dmitry Dygalo <dmitry@dygalo.dev>

docs/changelog.rst

@@ -8,6 +8,7 @@ Changelog
 
 - Not respecting ``allow_x00`` and ``codec`` configs options during filling gaps in explicit examples.
 - Internal error when sending ``multipart/form-data`` requests when the schema defines the ``*/*`` content type.
+- Internal error when YAML payload definition contains nested ``binary`` format.
 
 .. _v3.25.5:
 

src/schemathesis/serializers.py

@@ -1,4 +1,5 @@
 from __future__ import annotations
+
 import binascii
 import os
 from dataclasses import dataclass
@@ -10,13 +11,14 @@
     Collection,
     Dict,
     Generator,
-    cast,
     Protocol,
+    cast,
     runtime_checkable,
 )
 
-from .internal.copy import fast_deepcopy
 from ._xml import _to_xml
+from .internal.copy import fast_deepcopy
+from .internal.jsonschema import traverse_schema
 from .transports.content_types import (
     is_json_media_type,
     is_plain_text_media_type,
@@ -150,6 +152,10 @@ def as_werkzeug(self, context: SerializerContext, value: Any) -> dict[str, Any]:
         return _to_json(value)
 
 
+def _replace_binary(value: dict) -> dict:
+    return {key: value.data if isinstance(value, Binary) else value for key, value in value.items()}
+
+
 def _to_yaml(value: Any) -> dict[str, Any]:
     import yaml
 
@@ -162,6 +168,8 @@ def _to_yaml(value: Any) -> dict[str, Any]:
         return {"data": value}
     if isinstance(value, Binary):
         return {"data": value.data}
+    if isinstance(value, (list, dict)):
+        value = traverse_schema(value, _replace_binary)
     return {"data": yaml.dump(value, Dumper=SafeDumper)}
 
 

test/cli/__snapshots__/test_commands/test_nested_binary_in_yaml.raw

@@ -0,0 +1,25 @@
+Exit code: 0
+---
+Stdout:
+======================= Schemathesis test session starts =======================
+Schema location: file:///tmp/schema.json
+Base URL: http://127.0.0.1/api
+Specification version: Open API 3.0.2
+Random seed: 42
+Workers: 1
+Collected API operations: 1
+Collected API links: 0
+
+POST /api/property .                                                      [100%]
+
+=================================== SUMMARY ====================================
+
+Performed checks:
+    not_a_server_error                    10 / 10 passed          PASSED 
+
+WARNING: All API responses have a 404 status code. Did you specify the proper API location?
+
+Tip: Use the `--report` CLI option to visualize test results via Schemathesis.io.
+We run additional conformance checks on reports from public repos.
+
+============================== 1 passed in 1.00s ===============================

test/cli/test_commands.py

@@ -1357,6 +1357,32 @@ def decode(idx):
     # NOTE, that the actual API operation is not checked in this test
 
 
+def test_nested_binary_in_yaml(testdir, openapi3_base_url, cli, snapshot_cli, empty_open_api_3_schema):
+    empty_open_api_3_schema["paths"] = {
+        "/property": {
+            "post": {
+                "requestBody": {
+                    "required": True,
+                    "content": {
+                        "*/*": {
+                            "schema": {
+                                "type": "object",
+                                "properties": {"file": {"type": "string", "format": "binary"}},
+                                "required": ["file"],
+                            }
+                        }
+                    },
+                },
+                "responses": {
+                    "200": {"description": "OK", "content": {"application/json": {"schema": {"type": "object"}}}}
+                },
+            }
+        },
+    }
+    schema_file = testdir.make_openapi_schema_file(empty_open_api_3_schema)
+    assert cli.run(str(schema_file), f"--base-url={openapi3_base_url}", "--hypothesis-max-examples=10") == snapshot_cli
+
+
 @pytest.mark.operations("form")
 def test_urlencoded_form(cli, cli_args):
     # When the API operation accepts application/x-www-form-urlencoded