1 require File.expand_path(File.dirname(__FILE__) + '/edgecase')
3 # Greed is a dice game where you roll up to five dice to accumulate
4 # points. The following "score" function will be used to calculate the
5 # score of a single roll of the dice.
7 # A greed roll is scored as follows:
9 # * A set of three ones is 1000 points
11 # * A set of three numbers (other than ones) is worth 100 times the
12 # number. (e.g. three fives is 500 points).
14 # * A one (that is not part of a set of three) is worth 100 points.
16 # * A five (that is not part of a set of three) is worth 50 points.
18 # * Everything else is worth 0 points.
23 # score([1,1,1,5,1]) => 1150 points
24 # score([2,3,4,6,2]) => 0 points
25 # score([3,4,5,3,3]) => 350 points
26 # score([1,5,1,2,4]) => 250 points
28 # More scoring examples are given in the tests below:
30 # Your goal is to write the score method.
33 # You need to write this method
37 count = dice.select { |n| n == face }.size
40 result += (face == 1) ? 1000 : 100 * face
57 class AboutScoringProject < EdgeCase::Koan
58 def test_score_of_an_empty_list_is_zero
59 assert_equal 0, score([])
62 def test_score_of_a_single_roll_of_5_is_50
63 assert_equal 50, score([5])
66 def test_score_of_a_single_roll_of_1_is_100
67 assert_equal 100, score([1])
70 def test_score_of_multiple_1s_and_5s_is_the_sum_of_individual_scores
71 assert_equal 300, score([1,5,5,1])
74 def test_score_of_single_2s_3s_4s_and_6s_are_zero
75 assert_equal 0, score([2,3,4,6])
78 def test_score_of_a_triple_1_is_1000
79 assert_equal 1000, score([1,1,1])
82 def test_score_of_other_triples_is_100x
83 assert_equal 200, score([2,2,2])
84 assert_equal 300, score([3,3,3])
85 assert_equal 400, score([4,4,4])
86 assert_equal 500, score([5,5,5])
87 assert_equal 600, score([6,6,6])
90 def test_score_of_mixed_is_sum
91 assert_equal 250, score([2,5,2,2,3])
92 assert_equal 550, score([5,5,5,5])