Kata description

The objective of this kata is to build a scoring "service". You're not expected to write a complete game with dice rolls and automatic best hand selections (although you can if you want to and have time). Rather, given a roll, you're supposed to score that roll given a specified category the player wants to use it for. The categories you're supposed to support are listed and explained below.

Chance:

The player scores the sum of all dice, no matter what they read. For example:

• 1,1,3,3,6 placed on "chance" scores 14 (1+1+3+3+6)
• 4,5,5,6,1 placed on "chance" scores 21 (4+5+5+6+1)

Yatzy:

If all dice have the same number, the player scores 50 points. For example:

• 1,1,1,1,1 placed on "yatzy" scores 50
• 1,1,1,2,1 placed on "yatzy" scores 0

Ones, Twos, Threes, Fours, Fives, Sixes:

The player scores the sum of the dice that reads one, two, three, four, five or six, respectively. For example:

• 1,1,2,4,4 placed on "fours" scores 8 (4+4)
• 2,3,2,5,1 placed on "twos" scores 4 (2+2)
• 3,3,3,4,5 placed on "ones" scores 0

Pair:

The player scores the sum of the two highest matching dice. For example, when placed on "pair":

• 3,3,3,4,4 scores 8 (4+4)
• 1,1,6,2,6 scores 12 (6+6)
• 3,3,3,4,1 scores 6 (3+3)
• 3,3,3,3,1 scores 6 (3+3)

Two pairs:

If there are two pairs of dice with the same number, the player scores the sum of these dice. For example, when placed on "two pairs":

• 1,1,2,3,3 scores 8 (1+1+3+3)
• 1,1,2,3,4 scores 0
• 1,1,2,2,2 scores 6 (1+1+2+2)

Three of a kind:

If there are three dice with the same number, the player scores the sum of these dice. For example, when placed on "three of a kind":

• 3,3,3,4,5 scores 9 (3+3+3)
• 3,3,4,5,6 scores 0
• 3,3,3,3,1 scores 9 (3+3+3)

Four of a kind:

If there are four dice with the same number, the player scores the sum of these dice. For example, when placed on "four of a kind":

• 2,2,2,2,5 scores 8 (2+2+2+2)
• 2,2,2,5,5 scores 0
• 2,2,2,2,2 scores 8 (2+2+2+2)

Small straight:

When placed on "small straight", if the dice read

1,2,3,4,5,

the player scores 15 (the sum of all the dice).

Large straight:

When placed on "large straight", if the dice read

2,3,4,5,6,

the player scores 20 (the sum of all the dice).

Full house:

If the dice are two of a kind and three of a kind, the player scores the sum of all the dice. For example, when placed on "full house":

• 1,1,2,2,2 scores 8 (1+1+2+2+2)
• 2,2,3,3,4 scores 0
• 4,4,4,4,4 scores 0