Created
May 16, 2012 21:51
-
-
Save haru01/2714258 to your computer and use it in GitHub Desktop.
bowling
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
# encoding: utf-8 | |
class BowlingGame | |
attr_reader :rolls | |
def initialize(rolls) | |
@rolls = rolls | |
end | |
def score | |
(1..10).map { |frame_number| | |
rolls[range(frame_number)] | |
}.flatten.reduce(:+) | |
end | |
def range(frame_number) | |
first_i = (frame_number - 1) * 2 | |
second_i = first_i + 1 | |
return (first_i..second_i + 3) if frame_number <= 8 and double_strike?(first_i) | |
return (first_i..second_i + 2) if strike?(first_i) | |
return (first_i..second_i + 1) if spare?(first_i) | |
(first_i..second_i) | |
end | |
def spare?(first_i) | |
(rolls[first_i] + rolls[first_i + 1]) == 10 and !strike?(first_i) | |
end | |
def strike?(first_i) | |
rolls[first_i] == 10 | |
end | |
def double_strike?(first_i) | |
strike?(first_i) and strike?(first_i + 2) | |
end | |
end | |
describe "ボウリングのスコア" do | |
subject { BowlingGame.new(rolls).score } | |
context "すべてガーターの場合のボーリング計算が出来ること" do | |
let(:rolls) { [0] * 21 } | |
it { should == 0 } | |
end | |
context "ボーナスなしのスコア計算ができること" do | |
let(:rolls) { ([1] * 20).concat([0]) } | |
it { should == 20 } | |
end | |
context "初回スペアの場合のスコア計算ができること" do | |
let(:rolls) { [5, 5, 3].concat([0] * 18) } | |
it { should == (5 + 5 + 3) + 3 } | |
end | |
context "途中スペアの場合のスコア計算ができること" do | |
let(:rolls) { ([0] * 16).concat([5, 5, 3, 4, 0]) } | |
it { should == (5 + 5 + 3) + 3 + 4 } | |
end | |
context "最後スペアの場合のスコア計算ができること" do | |
let(:rolls) { ([0] * 18).concat([5, 5, 3]) } | |
it { should == (5 + 5 + 3) } | |
end | |
context "初回ストライクの場合のスコア計算ができること" do | |
let(:rolls) { [10, 0, 3, 4].concat([0] * 17) } | |
it { should == (10 + 0 + 3 + 4) + 3 + 4 } | |
end | |
context "途中ストライクの場合のスコア計算ができること" do | |
let(:rolls) { ([0] * 16).concat([10, 0, 7, 5, 0]) } | |
it { should == (10 + 0 + 7 + 5) + 7 + 5 } | |
end | |
context "ラストフレームの連続ストライク場合のスコア計算ができること" do | |
let(:rolls) { ([0] * 18).concat([10, 10, 10]) } | |
it { should == (10 + 10 + 10) } | |
end | |
context "9フレームからの連続ストライク場合のスコア計算ができること《注意》" do | |
let(:rolls) { ([0] * 16).concat([10, 0, 10, 1, 7]) } | |
it { should == (10 + 10 + 1) + 10 + 1 + 7 } | |
end | |
context "ダブルの場合のスコアが計算できること" do | |
let(:rolls) { [10, 0, 10, 0, 5, 4].concat([0] * 15) } | |
it { should == (10 + 10 + 5) + (10 + 5 + 4) + 5 + 4 } | |
end | |
context "トリプルの場合のスコア計算ができること" do | |
let(:rolls) { [10, 0, 10, 0, 10, 0, 4, 5].concat([0] * 15) } | |
it { should == (10 + 10 + 10) + (10 + 10 + 4) + (10 + 4 + 5) + 4 + 5 } | |
end | |
context "パーフェクトの場合のスコア計算ができること" do | |
let(:rolls) { ([10, 0] * 9).concat([10, 10, 10]) } | |
it { should == 300 } | |
end | |
context "サンプルの計算が出来ること" do | |
let(:rolls) { [5,4,0,0,10,0,9,1,6,3,7,0,6,2,10,0,10,0,1,9,5] } | |
it { should == 125 } | |
end | |
end |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment