Release 3.18.0

Added

• Extra information to VCR cassettes.
• The --contrib-unique-data CLI option that forces Schemathesis to generate unique test cases only.
  This feature is also available as a hook in schemathesis.contrib.unique_data.
• A few decorators & functions that provide a simpler API to extend Schemathesis:
  • schemathesis.auth for authentication providers
  • schemathesis.check for checks
  • schemathesis.hook & BaseSchema.hook for hooks
  • schemathesis.serializer for serializers
  • schemathesis.target for targets
  • schemathesis.openapi.format for custom OpenAPI formats
  • schemathesis.graphql.scalar for GraphQL scalars
• Open API: UUID format generation via the schemathesis.contrib.openapi.formats.uuid extension
  You could enable it via the --contrib-openapi-formats-uuid CLI option.

Changed

• Build: Switch the build backend to Hatch.
• Relax requirements for attrs. #1643
• Avoid occasional empty lines in cassettes.

Deprecated

• schemathesis.register_check in favor of schemathesis.check.
• schemathesis.register_target in favor of schemathesis.target.
• schemathesis.register_string_format in favor of schemathesis.openapi.format.
• schemathesis.graphql.register_scalar in favor of schemathesis.graphql.scalar.
• schemathesis.auth.register in favor of schemathesis.auth.

Fixed

• Remove recursive references from the last reference resolution level.
  It works on the best-effort basis and does not cover all possible cases. #947
• Invalid cassettes when headers contain characters with a special meaning in YAML.
• Properly display flaky deadline errors.
• Internal error when the utf8_bom fixup is used for WSGI apps.
• Printing headers that are set explicitly via get_call_kwargs in stateful testing. #828
• Display all explicitly defined headers in the generated cURL command.
• Replace starlette.testclient.TestClient with starlette_testclient.TestClient to keep compatibility with newer
  starlette versions. #1637

Performance

• Running negative tests filters out less data.
• Schema loading: Try a faster loader first if an HTTP response or a file is expected to be JSON.