[Proposal] Mock Everything

[Nillerr]

Description

It is common in the Java world to not want to introduce an interface only for the sake of testing, due to Java classes and members being non-final by default. Mockative can enable mocking of open and abstract classes and members by generating mocks for these the same as they're currently generated for interface types. The catch is we'll need to recursively generate mocks for the dependencies of these classes as well, in order to construct instances of the mocks.

Notes

Generating mocks for open classes and members can also enable implicitly stubbing members like in Mockito, as long as the return types themselves are also open and can have mocks generated for them. While this may be more feasible with class mocks, it is not a goal of this proposal.

[Nillerr]

Implemented by @kris098e in #83