Mocking endpoints an Open API Specification file defines isn't all that difficult.
However I am trying to mock only the endpoints that don't have an implementation yet.
For example I have an OAS file that defines an GET /dogs and an GET /cats endpoint.
Now when I implement GET /dogs in a - for example - Nest.js application and that application is running, I would want to have a mock server that only mocks the GET /cats endpoint.
That would make it possible to bundle the mock server and the application and to deploy them together, so that some form of response (either the implementation or the mocked) is always returned for every endpoint.
Is there some sort of tool/mock-server that has this kind of ability? Would doing something like that even make sense?