Default values in init methods

[mokagio]

There's been some discussion on whether or not to allow default values for init parameters.

For example:

class CoffeeMachine {
  let waterBoiler: WaterBoiler

  init(boiler: WaterBoiler = FilteredWaterBoiler.shared) { ... }
}

How do we feel about this?

[mokagio]

My opinion is that we should not do this. It opens the door for us forgetting to inject instances and rely on default/shared values.

[cuteiosdev]

I like to use them if it is sensible or the value is an optional.

I do though see the benefit of making us aware of what is actually going on in the function.