Flip to minitest spec.
Implement find_by_first_name.
Implement finding by last name.
Refactor.
Implement find_by_id.
Now the easiest way to pass the csv test is to read the csv.
Refactor to specs.
Start TDD for lookup.
More examples for lookup, finish implementation for last name lookup.
Implement lookup for multiple results.
Implement a first name filter.
Refactor into the original code.