Create spys from class automatically

[cedricongjh]

Description of feature/enhancement
Currently, developers need to manually create spy objects that mock a service/component:

e.g.

Let's create a testing utility function that automatically creates these spy objects for us

Justification

This will improve the developer experience when writing tests, instead of having the developer having to repeat the mock object, they can simply call the function once to create the object for them.

An added benefit would be that the spy object created be typed instead of any, and our IDEs would be able to autocomplete the method name for us whenever we are accessing the spy method of an object.