test(object-ref-spec): add toHaveBeenCalledWith tests for get and update function

- add toHaveBeenCalledWith to get function
- add a test when invoking get without fields to return rejected promise
- add toHaveBeenCalledWith to update function
- add a test when invoking update without ops to return rejected promise
- add toHaveBeenCalledWith to delete function

closes REALLY-78