Convert stub.loop to a function

[natlibfi-arlehiko]

Stub methods chain be chained since they return the stub object. However, stub.loop is not a function but a variable. Consider changing it to a function (I can look into implementing the change if you find this reasonable).

Examples

Variable

var stub = simple.stub().returnWith('bar');
mock = {
  foo: stub
};

stub.loop = false;

Function

var mock = {
  foo: simple.stub().loop(false).returnWith('bar')
};

[HCanber]

Changing it would be a breaking change, so it's probably better to add new functions that can be chained. What about something like: stub.noLoop() equals stub.loop = false stub.withLoop() equals stub.loop = true