Improve instructions

[Samir70]

One student wanted to mock user input for his tests, because the instructions specifically say that the user will input data. To fix that:

• clarify the instructions as being unit tests, so whole input process doesn't need to part of that.
• Give a class outline with, say, two methods: inputFrame() and getFinalScore()
• Some examples of expectations that the students could turn into jest tests. (There is an example at the bottom that could be turned into a test)