This is the repo for a School of Code session on TDD.
We'll start by creating a function that calculates a scrabble score for a given word, and returns the score.
We'll keep extending the functionality from there.
Don't read ahead, don't try to predict what the code might need later, write the simplest code for each step in turn.
Write the tests, and the implementation, for each letter score, this lets us know that the basic single letter scores are correct. Use .each (jest docs) to keep your tests nice and short.
Write some tests for word scores. The tests should look much the same as in Step 1, but the implementation will start to get more complex.
Write a test to ensure our function throws an error if any of the characters given are outside of A-Z. You can use .toThrow (jest docs) to catch and check the error.
If a player uses all seven tiles, they should score a bonus of 50 points on top of the word score.
Extend the tests and function to accept both uppercase and lowercase letters, and score correctly.
--- Regroup ---
The board contains Premium squares that double, or triple, the letter score. Extend the function to accept these squares and calculate the score correctly.
Premium squares can also double, or triple, the word score.