Loose mocks will create stubs for all void methods of the mocked type. For all value type members,
the mock will return its default value and for all reference type members - null. For collection
return types (e.g. array or IEnumerable) a non-null empty collection will be returned, instead
To reach deeper-level functions, you will need to arrange them first. Loose mocks are the predecessors of the
RecursiveLoose behavior, which makes them rarely used nowadays.
To see the difference between RecursiveLoose and LooseBehavior, check