Support URI parameters

[oscaralanpierce]

Summary

Rambo needs to be extended to support URI parameters - e.g. :id in /authors/:id. This feature is central to REST API design. This is very closely coupled to issue #87, which calls for support for nested routes.

Expected Behavior

Rambo should generate useful tests for routes with URI parameters.

Current Behavior

If a route with a URI parameter is nested, it is ignored. If it is not nested, the URI parameter is included verbatim in the URI - i.e., a request will be sent to "/authors/:id" instead of "/authors/27" or whatever that ID would actually be.

Technical Challenges

• [ ] Identifying where a given value "comes from" - e.g., that an :id parameter must be the ID of a resource that exists in the database
• [ ] Identifying the correct fixtures to be used for a given test