Do I need to complete a program in order to know my test results?
No; you're creating a set of simple
test data for the conversion program. A program that generates test data would essentially be the same as the conversion program, which defeats the purpose of generating test data.
I'm really not sure what I need to do next, can anyone help?
Whatever the inputs are, just make some up--then figure out what the program should output if you feed it those inputs. Repeat until you think you have enough.
Unsolved 
