A technique to mock "static interfaces" (e.g. isInputRange)

[Gary Willoughby via Digitalmars-d]

On Wednesday, 25 May 2016 at 21:38:23 UTC, Atila Neves wrote:
> There was talk in the forum of making it easier to come up 
> instantiations of say, an input range for testing purposes. 
> That got me thinking of how mocking frameworks make it easy to 
> pass in dependencies without having to write a whole new "test 
> double" type oneself. How would one do that for what I've 
> started calling "static interfaces"? How would one mock an 
> input range?

I have a mocking framework here:

https://github.com/nomad-software/dunit

Maybe that is useful? The only problem with mine is that it needs 
to be injected inside an interface. Like this:

interface InputRange(T) {
     @property T front();
     void popFront();
     @property bool empty();

     mixin Mockable!(InputRange!(T));
}

auto mock = InputRange.getMock()