Add ConsumerVersionSelector Class

[JP-Ellis]

Have you read the Contributing Guidelines on issues?

• I have read the Contributing Guidelines on issues.

Prerequisites

• I'm using the latest version of pact-python.
• I have read the console error message carefully (if applicable).

Description

Replace the str with a new ConsumerVersionSelector class, or equivalent kwargs in:

pact-python/src/pact/v3/verifier.py

Line 893 in c7f6667

def consumer_versions(self, *versions: str) -> Self:

Reproducible demo

No response

Steps to reproduce

Try using the consumer_versions key with most strings and the FFI call fails.

Expected behavior

The end-user should not be responsible for manually serialising data into JSON. Instead, the Python implementation should provide a nice interface.

There could be two options for this implementation, ultimately implementing the following Rust struct:

https://github.com/pact-foundation/pact-reference/blob/fd1ba0c390267ae72be1a5b272fe314e904aa423/rust/pact_verifier/src/pact_broker.rs#L1026-L1083

The first option is to add a TypedDict class, and using the Unpack typing annotation to help convert it into appropriate kwargs. The other is to manually define the kwargs as per the underlying struct.

The JSON string would then be created within the method's logic.

Actual behavior

End user is responsible for generating valid JSON string.

Your environment

No response

Self-service

• I'd be willing to fix this bug myself.