spec/bunch_spec.rb in games_dice-0.3.12 vs spec/bunch_spec.rb in games_dice-0.4.0
- old
+ new
@@ -1,420 +1,399 @@
-require 'helpers'
-
-describe GamesDice::Bunch do
-
- describe "dice scheme" do
-
- before :each do
- srand(67809)
- end
-
- describe '1d10' do
- let(:bunch) { GamesDice::Bunch.new( :sides => 10, :ndice => 1 ) }
-
- it "should simulate rolling a ten-sided die" do
- [3,2,8,8,5,3,7].each do |expected_total|
- bunch.roll.should == expected_total
- bunch.result.should == expected_total
- end
- end
-
- it "should concisely explain each result" do
- ["3", "2", "8", "8"].each do |expected_explain|
- bunch.roll
- bunch.explain_result.should == expected_explain
- end
- end
-
- it "should calculate correct min, max = 1,10" do
- bunch.min.should == 1
- bunch.max.should == 10
- end
-
- it "should have a mean value of 5.5" do
- bunch.probabilities.expected.should be_within(1e-10).of 5.5
- end
-
- it "should calculate probabilities correctly" do
- prob_hash = bunch.probabilities.to_h
- prob_hash[1].should be_within(1e-10).of 0.1
- prob_hash[2].should be_within(1e-10).of 0.1
- prob_hash[3].should be_within(1e-10).of 0.1
- prob_hash[4].should be_within(1e-10).of 0.1
- prob_hash[5].should be_within(1e-10).of 0.1
- prob_hash[6].should be_within(1e-10).of 0.1
- prob_hash[7].should be_within(1e-10).of 0.1
- prob_hash[8].should be_within(1e-10).of 0.1
- prob_hash[9].should be_within(1e-10).of 0.1
- prob_hash[10].should be_within(1e-10).of 0.1
- prob_hash.values.inject(:+).should be_within(1e-9).of 1.0
- end
- end
-
- describe '2d6' do
- let(:bunch) { GamesDice::Bunch.new( :sides => 6, :ndice => 2 ) }
-
- it "should simulate rolling two six-sided dice and adding them" do
- [9,6,11,9,7,7,10].each do |expected_total|
- bunch.roll.should == expected_total
- bunch.result.should == expected_total
- end
- end
-
- it "should concisely explain each result" do
- ["3 + 6 = 9","2 + 4 = 6","5 + 6 = 11","3 + 6 = 9","2 + 5 = 7","6 + 1 = 7","5 + 5 = 10",].each do |expected_explain|
- bunch.roll
- bunch.explain_result.should == expected_explain
- end
- end
-
- it "should calculate correct min, max = 2,12" do
- bunch.min.should == 2
- bunch.max.should == 12
- end
-
- it "should have a mean value of 7.0" do
- bunch.probabilities.expected.should be_within(1e-10).of 7.0
- end
-
- it "should calculate probabilities correctly" do
- prob_hash = bunch.probabilities.to_h
- prob_hash[2].should be_within(1e-10).of 1/36.0
- prob_hash[3].should be_within(1e-10).of 2/36.0
- prob_hash[4].should be_within(1e-10).of 3/36.0
- prob_hash[5].should be_within(1e-10).of 4/36.0
- prob_hash[6].should be_within(1e-10).of 5/36.0
- prob_hash[7].should be_within(1e-10).of 6/36.0
- prob_hash[8].should be_within(1e-10).of 5/36.0
- prob_hash[9].should be_within(1e-10).of 4/36.0
- prob_hash[10].should be_within(1e-10).of 3/36.0
- prob_hash[11].should be_within(1e-10).of 2/36.0
- prob_hash[12].should be_within(1e-10).of 1/36.0
- prob_hash.values.inject(:+).should be_within(1e-9).of 1.0
- end
- end
-
- describe '20d10' do
- let(:bunch) { GamesDice::Bunch.new( :sides => 10, :ndice => 20 ) }
-
- it "should simulate rolling twenty ten-sided dice and adding them" do
- [132,103,102,124,132,96,111].each do |expected_total|
- bunch.roll.should == expected_total
- bunch.result.should == expected_total
- end
- end
-
- it "should concisely explain each result" do
- ["3 + 2 + 8 + 8 + 5 + 3 + 7 + 7 + 6 + 10 + 7 + 6 + 9 + 5 + 5 + 8 + 10 + 9 + 5 + 9 = 132",
- "3 + 9 + 1 + 4 + 3 + 5 + 7 + 1 + 10 + 4 + 7 + 7 + 6 + 5 + 2 + 7 + 4 + 9 + 7 + 2 = 103",
- "6 + 1 + 1 + 3 + 1 + 4 + 9 + 6 + 3 + 10 + 9 + 10 + 8 + 4 + 1 + 4 + 2 + 1 + 10 + 9 = 102",
- ].each do |expected_explain|
- bunch.roll
- bunch.explain_result.should == expected_explain
- end
- end
-
- it "should calculate correct min, max = 20,200" do
- bunch.min.should == 20
- bunch.max.should == 200
- end
-
- it "should have a mean value of 110.0" do
- bunch.probabilities.expected.should be_within(1e-8).of 110.0
- end
-
- it "should calculate probabilities correctly" do
- prob_hash = bunch.probabilities.to_h
- prob_hash[20].should be_within(1e-26).of 1e-20
- prob_hash[110].should be_within(1e-10).of 0.0308191892
- prob_hash.values.inject(:+).should be_within(1e-9).of 1.0
- end
- end
-
- describe '4d6 keep best 3' do
- let(:bunch) { GamesDice::Bunch.new( :sides => 6, :ndice => 4, :keep_mode => :keep_best, :keep_number => 3 ) }
-
- it "should simulate rolling four six-sided dice and adding the best three values" do
- [13,17,13,12,13,10,14].each do |expected_total|
- bunch.roll.should == expected_total
- bunch.result.should == expected_total
- end
- end
-
- it "should concisely explain each result" do
- ["3, 6, 2, 4. Keep: 3 + 4 + 6 = 13",
- "5, 6, 3, 6. Keep: 5 + 6 + 6 = 17",
- "2, 5, 6, 1. Keep: 2 + 5 + 6 = 13",
- "5, 5, 2, 1. Keep: 2 + 5 + 5 = 12",
- ].each do |expected_explain|
- bunch.roll
- bunch.explain_result.should == expected_explain
- end
- end
-
- it "should calculate correct min, max = 3,18" do
- bunch.min.should == 3
- bunch.max.should == 18
- end
-
- it "should have a mean value of roughly 12.2446" do
- bunch.probabilities.expected.should be_within(1e-9).of 12.244598765
- end
-
- it "should calculate probabilities correctly" do
- prob_hash = bunch.probabilities.to_h
- prob_hash[3].should be_within(1e-10).of 1/1296.0
- prob_hash[4].should be_within(1e-10).of 4/1296.0
- prob_hash[5].should be_within(1e-10).of 10/1296.0
- prob_hash[6].should be_within(1e-10).of 21/1296.0
- prob_hash[7].should be_within(1e-10).of 38/1296.0
- prob_hash[8].should be_within(1e-10).of 62/1296.0
- prob_hash[9].should be_within(1e-10).of 91/1296.0
- prob_hash[10].should be_within(1e-10).of 122/1296.0
- prob_hash[11].should be_within(1e-10).of 148/1296.0
- prob_hash[12].should be_within(1e-10).of 167/1296.0
- prob_hash[13].should be_within(1e-10).of 172/1296.0
- prob_hash[14].should be_within(1e-10).of 160/1296.0
- prob_hash[15].should be_within(1e-10).of 131/1296.0
- prob_hash[16].should be_within(1e-10).of 94/1296.0
- prob_hash[17].should be_within(1e-10).of 54/1296.0
- prob_hash[18].should be_within(1e-10).of 21/1296.0
- prob_hash.values.inject(:+).should be_within(1e-9).of 1.0
- end
- end
-
- describe '10d10 keep worst one' do
- let(:bunch) { GamesDice::Bunch.new( :sides => 10, :ndice => 10, :keep_mode => :keep_worst, :keep_number => 1 ) }
-
- it "should simulate rolling ten ten-sided dice and keeping the worst value" do
- [2,5,1,2,1,1,2].each do |expected_total|
- bunch.roll.should == expected_total
- bunch.result.should == expected_total
- end
- end
-
- it "should concisely explain each result" do
- ["3, 2, 8, 8, 5, 3, 7, 7, 6, 10. Keep: 2",
- "7, 6, 9, 5, 5, 8, 10, 9, 5, 9. Keep: 5",
- "3, 9, 1, 4, 3, 5, 7, 1, 10, 4. Keep: 1",
- "7, 7, 6, 5, 2, 7, 4, 9, 7, 2. Keep: 2",
- ].each do |expected_explain|
- bunch.roll
- bunch.explain_result.should == expected_explain
- end
- end
-
- it "should calculate correct min, max = 1,10" do
- bunch.min.should == 1
- bunch.max.should == 10
- end
-
- it "should have a mean value of roughly 1.491" do
- bunch.probabilities.expected.should be_within(1e-9).of 1.4914341925
- end
-
- it "should calculate probabilities correctly" do
- prob_hash = bunch.probabilities.to_h
- prob_hash[1].should be_within(1e-10).of 0.6513215599
- prob_hash[2].should be_within(1e-10).of 0.2413042577
- prob_hash[3].should be_within(1e-10).of 0.0791266575
- prob_hash[4].should be_within(1e-10).of 0.0222009073
- prob_hash[5].should be_within(1e-10).of 0.0050700551
- prob_hash[6].should be_within(1e-10).of 0.0008717049
- prob_hash[7].should be_within(1e-10).of 0.0000989527
- prob_hash[8].should be_within(1e-10).of 0.0000058025
- prob_hash[9].should be_within(1e-10).of 0.0000001023
- prob_hash[10].should be_within(1e-18).of 1e-10
- prob_hash.values.inject(:+).should be_within(1e-9).of 1.0
- end
- end
-
- describe '5d10, re-roll and add on 10s, keep best 2' do
- let(:bunch) {
- GamesDice::Bunch.new(
- :sides => 10, :ndice => 5, :keep_mode => :keep_best, :keep_number => 2,
- :rerolls => [GamesDice::RerollRule.new(10,:==,:reroll_add)]
- ) }
-
- it "should simulate rolling five ten-sided 'exploding' dice and adding the best two values" do
- [16,24,17,28,12,21,16].each do |expected_total|
- bunch.roll.should == expected_total
- bunch.result.should == expected_total
- end
- end
-
- it "should concisely explain each result" do
- ["3, 2, 8, 8, 5. Keep: 8 + 8 = 16",
- "3, 7, 7, 6, [10+7] 17. Keep: 7 + 17 = 24",
- "6, 9, 5, 5, 8. Keep: 8 + 9 = 17",
- "[10+9] 19, 5, 9, 3, 9. Keep: 9 + 19 = 28",
- ].each do |expected_explain|
- bunch.roll
- bunch.explain_result.should == expected_explain
- end
- end
-
- it "should calculate correct min, max = 2, > 100" do
- bunch.min.should == 2
- bunch.max.should > 100
- end
-
- it "should have a mean value of roughly 18.986" do
- bunch.probabilities.expected.should be_within(1e-9).of 18.9859925804
- end
-
- it "should calculate probabilities correctly" do
- prob_hash = bunch.probabilities.to_h
- prob_hash[2].should be_within(1e-10).of 0.00001
- prob_hash[3].should be_within(1e-10).of 0.00005
- prob_hash[4].should be_within(1e-10).of 0.00031
- prob_hash[5].should be_within(1e-10).of 0.00080
- prob_hash[6].should be_within(1e-10).of 0.00211
- prob_hash[7].should be_within(1e-10).of 0.00405
- prob_hash[8].should be_within(1e-10).of 0.00781
- prob_hash[9].should be_within(1e-10).of 0.01280
- prob_hash[10].should be_within(1e-10).of 0.02101
- prob_hash[12].should be_within(1e-10).of 0.045715
- prob_hash[13].should be_within(1e-10).of 0.060830
- prob_hash[14].should be_within(1e-10).of 0.077915
- prob_hash[15].should be_within(1e-10).of 0.090080
- prob_hash[16].should be_within(1e-10).of 0.097935
- prob_hash[17].should be_within(1e-10).of 0.091230
- prob_hash[18].should be_within(1e-10).of 0.070015
- prob_hash[19].should be_within(1e-10).of 0.020480
- prob_hash[20].should be_within(1e-10).of 0.032805
- prob_hash[22].should be_within(1e-10).of 0.0334626451
- prob_hash[23].should be_within(1e-10).of 0.0338904805
- prob_hash[24].should be_within(1e-10).of 0.0338098781
- prob_hash[25].should be_within(1e-10).of 0.0328226480
- prob_hash[26].should be_within(1e-10).of 0.0304393461
- prob_hash[27].should be_within(1e-10).of 0.0260456005
- prob_hash[28].should be_within(1e-10).of 0.0189361531
- prob_hash[29].should be_within(1e-10).of 0.0082804480
- prob_hash[30].should be_within(1e-10).of 0.0103524151
- prob_hash.values.inject(:+).should be_within(1e-9).of 1.0
- end
- end
-
- describe 'roll 2d20, keep best value' do
- let(:bunch) do
- GamesDice::Bunch.new(
- :sides => 20, :ndice => 2, :keep_mode => :keep_best, :keep_number => 1
- )
- end
-
- it "should simulate rolling two twenty-sided dice and keeping the best value" do
- [19,18,14,6,13,10,16].each do |expected_total|
- bunch.roll.should == expected_total
- bunch.result.should == expected_total
- end
- end
-
- it "should concisely explain each result" do
- ["19, 14. Keep: 19",
- "18, 16. Keep: 18",
- "5, 14. Keep: 14",
- "3, 6. Keep: 6",
- ].each do |expected_explain|
- bunch.roll
- bunch.explain_result.should == expected_explain
- end
- end
-
- it "should calculate correct min, max = 1,20" do
- bunch.min.should == 1
- bunch.max.should == 20
- end
-
- it "should have a mean value of 13.825" do
- bunch.probabilities.expected.should be_within(1e-9).of 13.825
- end
-
- it "should calculate probabilities correctly" do
- prob_hash = bunch.probabilities.to_h
- prob_hash[1].should be_within(1e-10).of 1/400.0
- prob_hash[2].should be_within(1e-10).of 3/400.0
- prob_hash[3].should be_within(1e-10).of 5/400.0
- prob_hash[4].should be_within(1e-10).of 7/400.0
- prob_hash[5].should be_within(1e-10).of 9/400.0
- prob_hash[6].should be_within(1e-10).of 11/400.0
- prob_hash[7].should be_within(1e-10).of 13/400.0
- prob_hash[8].should be_within(1e-10).of 15/400.0
- prob_hash[9].should be_within(1e-10).of 17/400.0
- prob_hash[10].should be_within(1e-10).of 19/400.0
- prob_hash[11].should be_within(1e-10).of 21/400.0
- prob_hash[12].should be_within(1e-10).of 23/400.0
- prob_hash[13].should be_within(1e-10).of 25/400.0
- prob_hash[14].should be_within(1e-10).of 27/400.0
- prob_hash[15].should be_within(1e-10).of 29/400.0
- prob_hash[16].should be_within(1e-10).of 31/400.0
- prob_hash[17].should be_within(1e-10).of 33/400.0
- prob_hash[18].should be_within(1e-10).of 35/400.0
- prob_hash[19].should be_within(1e-10).of 37/400.0
- prob_hash[20].should be_within(1e-10).of 39/400.0
- prob_hash.values.inject(:+).should be_within(1e-9).of 1.0
- end
- end
-
- describe 'roll 2d20, keep worst value' do
- let(:bunch) do
- GamesDice::Bunch.new(
- :sides => 20, :ndice => 2, :keep_mode => :keep_worst, :keep_number => 1
- )
- end
-
- it "should simulate rolling two twenty-sided dice and keeping the best value" do
- [14,16,5,3,7,5,9].each do |expected_total|
- bunch.roll.should == expected_total
- bunch.result.should == expected_total
- end
- end
-
- it "should concisely explain each result" do
- ["19, 14. Keep: 14",
- "18, 16. Keep: 16",
- "5, 14. Keep: 5",
- "3, 6. Keep: 3",
- ].each do |expected_explain|
- bunch.roll
- bunch.explain_result.should == expected_explain
- end
- end
-
- it "should calculate correct min, max = 1,20" do
- bunch.min.should == 1
- bunch.max.should == 20
- end
-
- it "should have a mean value of 7.175" do
- bunch.probabilities.expected.should be_within(1e-9).of 7.175
- end
-
- it "should calculate probabilities correctly" do
- prob_hash = bunch.probabilities.to_h
- prob_hash[1].should be_within(1e-10).of 39/400.0
- prob_hash[2].should be_within(1e-10).of 37/400.0
- prob_hash[3].should be_within(1e-10).of 35/400.0
- prob_hash[4].should be_within(1e-10).of 33/400.0
- prob_hash[5].should be_within(1e-10).of 31/400.0
- prob_hash[6].should be_within(1e-10).of 29/400.0
- prob_hash[7].should be_within(1e-10).of 27/400.0
- prob_hash[8].should be_within(1e-10).of 25/400.0
- prob_hash[9].should be_within(1e-10).of 23/400.0
- prob_hash[10].should be_within(1e-10).of 21/400.0
- prob_hash[11].should be_within(1e-10).of 19/400.0
- prob_hash[12].should be_within(1e-10).of 17/400.0
- prob_hash[13].should be_within(1e-10).of 15/400.0
- prob_hash[14].should be_within(1e-10).of 13/400.0
- prob_hash[15].should be_within(1e-10).of 11/400.0
- prob_hash[16].should be_within(1e-10).of 9/400.0
- prob_hash[17].should be_within(1e-10).of 7/400.0
- prob_hash[18].should be_within(1e-10).of 5/400.0
- prob_hash[19].should be_within(1e-10).of 3/400.0
- prob_hash[20].should be_within(1e-10).of 1/400.0
- prob_hash.values.inject(:+).should be_within(1e-9).of 1.0
- end
- end
-
- end
-
-end
+# frozen_string_literal: true
+
+require 'helpers'
+
+describe GamesDice::Bunch do
+ describe 'dice scheme' do
+ before :each do
+ srand(67_809)
+ end
+
+ describe '1d10' do
+ let(:bunch) { GamesDice::Bunch.new(sides: 10, ndice: 1) }
+
+ it 'should simulate rolling a ten-sided die' do
+ [3, 2, 8, 8, 5, 3, 7].each do |expected_total|
+ expect(bunch.roll).to eql expected_total
+ expect(bunch.result).to eql expected_total
+ end
+ end
+
+ it 'should concisely explain each result' do
+ %w[3 2 8 8].each do |expected_explain|
+ bunch.roll
+ expect(bunch.explain_result).to eql expected_explain
+ end
+ end
+
+ it 'should calculate correct min, max = 1,10' do
+ expect(bunch.min).to eql 1
+ expect(bunch.max).to eql 10
+ end
+
+ it 'should have a mean value of 5.5' do
+ expect(bunch.probabilities.expected).to be_within(1e-10).of 5.5
+ end
+
+ it 'should calculate probabilities correctly' do
+ prob_hash = bunch.probabilities.to_h
+ expect(prob_hash[1]).to be_within(1e-10).of 0.1
+ expect(prob_hash[2]).to be_within(1e-10).of 0.1
+ expect(prob_hash[3]).to be_within(1e-10).of 0.1
+ expect(prob_hash[4]).to be_within(1e-10).of 0.1
+ expect(prob_hash[5]).to be_within(1e-10).of 0.1
+ expect(prob_hash[6]).to be_within(1e-10).of 0.1
+ expect(prob_hash[7]).to be_within(1e-10).of 0.1
+ expect(prob_hash[8]).to be_within(1e-10).of 0.1
+ expect(prob_hash[9]).to be_within(1e-10).of 0.1
+ expect(prob_hash[10]).to be_within(1e-10).of 0.1
+ expect(prob_hash.values.inject(:+)).to be_within(1e-9).of 1.0
+ end
+ end
+
+ describe '2d6' do
+ let(:bunch) { GamesDice::Bunch.new(sides: 6, ndice: 2) }
+
+ it 'should simulate rolling two six-sided dice and adding them' do
+ [9, 6, 11, 9, 7, 7, 10].each do |expected_total|
+ expect(bunch.roll).to eql expected_total
+ expect(bunch.result).to eql expected_total
+ end
+ end
+
+ it 'should concisely explain each result' do
+ ['3 + 6 = 9', '2 + 4 = 6', '5 + 6 = 11', '3 + 6 = 9', '2 + 5 = 7', '6 + 1 = 7',
+ '5 + 5 = 10'].each do |expected_explain|
+ bunch.roll
+ expect(bunch.explain_result).to eql expected_explain
+ end
+ end
+
+ it 'should calculate correct min, max = 2,12' do
+ expect(bunch.min).to eql 2
+ expect(bunch.max).to eql 12
+ end
+
+ it 'should have a mean value of 7.0' do
+ expect(bunch.probabilities.expected).to be_within(1e-10).of 7.0
+ end
+
+ it 'should calculate probabilities correctly' do
+ prob_hash = bunch.probabilities.to_h
+ expect(prob_hash[2]).to be_within(1e-10).of 1 / 36.0
+ expect(prob_hash[3]).to be_within(1e-10).of 2 / 36.0
+ expect(prob_hash[4]).to be_within(1e-10).of 3 / 36.0
+ expect(prob_hash[5]).to be_within(1e-10).of 4 / 36.0
+ expect(prob_hash[6]).to be_within(1e-10).of 5 / 36.0
+ expect(prob_hash[7]).to be_within(1e-10).of 6 / 36.0
+ expect(prob_hash[8]).to be_within(1e-10).of 5 / 36.0
+ expect(prob_hash[9]).to be_within(1e-10).of 4 / 36.0
+ expect(prob_hash[10]).to be_within(1e-10).of 3 / 36.0
+ expect(prob_hash[11]).to be_within(1e-10).of 2 / 36.0
+ expect(prob_hash[12]).to be_within(1e-10).of 1 / 36.0
+ expect(prob_hash.values.inject(:+)).to be_within(1e-9).of 1.0
+ end
+ end
+
+ describe '20d10' do
+ let(:bunch) { GamesDice::Bunch.new(sides: 10, ndice: 20) }
+
+ it 'should simulate rolling twenty ten-sided dice and adding them' do
+ [132, 103, 102, 124, 132, 96, 111].each do |expected_total|
+ expect(bunch.roll).to eql expected_total
+ expect(bunch.result).to eql expected_total
+ end
+ end
+
+ it 'should concisely explain each result' do
+ explains = ['3 + 2 + 8 + 8 + 5 + 3 + 7 + 7 + 6 + 10 + 7 + 6 + 9 + 5 + 5 + 8 + 10 + 9 + 5 + 9 = 132',
+ '3 + 9 + 1 + 4 + 3 + 5 + 7 + 1 + 10 + 4 + 7 + 7 + 6 + 5 + 2 + 7 + 4 + 9 + 7 + 2 = 103',
+ '6 + 1 + 1 + 3 + 1 + 4 + 9 + 6 + 3 + 10 + 9 + 10 + 8 + 4 + 1 + 4 + 2 + 1 + 10 + 9 = 102']
+
+ explains.each do |expected_explain|
+ bunch.roll
+ expect(bunch.explain_result).to eql expected_explain
+ end
+ end
+
+ it 'should calculate correct min, max = 20,200' do
+ expect(bunch.min).to eql 20
+ expect(bunch.max).to eql 200
+ end
+
+ it 'should have a mean value of 110.0' do
+ expect(bunch.probabilities.expected).to be_within(1e-8).of 110.0
+ end
+
+ it 'should calculate probabilities correctly' do
+ prob_hash = bunch.probabilities.to_h
+ expect(prob_hash[20]).to be_within(1e-26).of 1e-20
+ expect(prob_hash[110]).to be_within(1e-10).of 0.0308191892
+ expect(prob_hash.values.inject(:+)).to be_within(1e-9).of 1.0
+ end
+ end
+
+ describe '4d6 keep best 3' do
+ let(:bunch) { GamesDice::Bunch.new(sides: 6, ndice: 4, keep_mode: :keep_best, keep_number: 3) }
+
+ it 'should simulate rolling four six-sided dice and adding the best three values' do
+ [13, 17, 13, 12, 13, 10, 14].each do |expected_total|
+ expect(bunch.roll).to eql expected_total
+ expect(bunch.result).to eql expected_total
+ end
+ end
+
+ it 'should concisely explain each result' do
+ ['3, 6, 2, 4. Keep: 3 + 4 + 6 = 13',
+ '5, 6, 3, 6. Keep: 5 + 6 + 6 = 17',
+ '2, 5, 6, 1. Keep: 2 + 5 + 6 = 13',
+ '5, 5, 2, 1. Keep: 2 + 5 + 5 = 12'].each do |expected_explain|
+ bunch.roll
+ expect(bunch.explain_result).to eql expected_explain
+ end
+ end
+
+ it 'should calculate correct min, max = 3,18' do
+ expect(bunch.min).to eql 3
+ expect(bunch.max).to eql 18
+ end
+
+ it 'should have a mean value of roughly 12.2446' do
+ expect(bunch.probabilities.expected).to be_within(1e-9).of 12.244598765
+ end
+
+ it 'should calculate probabilities correctly' do
+ prob_hash = bunch.probabilities.to_h
+ expect(prob_hash[3]).to be_within(1e-10).of 1 / 1296.0
+ expect(prob_hash[4]).to be_within(1e-10).of 4 / 1296.0
+ expect(prob_hash[5]).to be_within(1e-10).of 10 / 1296.0
+ expect(prob_hash[6]).to be_within(1e-10).of 21 / 1296.0
+ expect(prob_hash[7]).to be_within(1e-10).of 38 / 1296.0
+ expect(prob_hash[8]).to be_within(1e-10).of 62 / 1296.0
+ expect(prob_hash[9]).to be_within(1e-10).of 91 / 1296.0
+ expect(prob_hash[10]).to be_within(1e-10).of 122 / 1296.0
+ expect(prob_hash[11]).to be_within(1e-10).of 148 / 1296.0
+ expect(prob_hash[12]).to be_within(1e-10).of 167 / 1296.0
+ expect(prob_hash[13]).to be_within(1e-10).of 172 / 1296.0
+ expect(prob_hash[14]).to be_within(1e-10).of 160 / 1296.0
+ expect(prob_hash[15]).to be_within(1e-10).of 131 / 1296.0
+ expect(prob_hash[16]).to be_within(1e-10).of 94 / 1296.0
+ expect(prob_hash[17]).to be_within(1e-10).of 54 / 1296.0
+ expect(prob_hash[18]).to be_within(1e-10).of 21 / 1296.0
+ expect(prob_hash.values.inject(:+)).to be_within(1e-9).of 1.0
+ end
+ end
+
+ describe '10d10 keep worst one' do
+ let(:bunch) { GamesDice::Bunch.new(sides: 10, ndice: 10, keep_mode: :keep_worst, keep_number: 1) }
+
+ it 'should simulate rolling ten ten-sided dice and keeping the worst value' do
+ [2, 5, 1, 2, 1, 1, 2].each do |expected_total|
+ expect(bunch.roll).to eql expected_total
+ expect(bunch.result).to eql expected_total
+ end
+ end
+
+ it 'should concisely explain each result' do
+ ['3, 2, 8, 8, 5, 3, 7, 7, 6, 10. Keep: 2',
+ '7, 6, 9, 5, 5, 8, 10, 9, 5, 9. Keep: 5',
+ '3, 9, 1, 4, 3, 5, 7, 1, 10, 4. Keep: 1',
+ '7, 7, 6, 5, 2, 7, 4, 9, 7, 2. Keep: 2'].each do |expected_explain|
+ bunch.roll
+ expect(bunch.explain_result).to eql expected_explain
+ end
+ end
+
+ it 'should calculate correct min, max = 1,10' do
+ expect(bunch.min).to eql 1
+ expect(bunch.max).to eql 10
+ end
+
+ it 'should have a mean value of roughly 1.491' do
+ expect(bunch.probabilities.expected).to be_within(1e-9).of 1.4914341925
+ end
+
+ it 'should calculate probabilities correctly' do
+ prob_hash = bunch.probabilities.to_h
+ expect(prob_hash[1]).to be_within(1e-10).of 0.6513215599
+ expect(prob_hash[2]).to be_within(1e-10).of 0.2413042577
+ expect(prob_hash[3]).to be_within(1e-10).of 0.0791266575
+ expect(prob_hash[4]).to be_within(1e-10).of 0.0222009073
+ expect(prob_hash[5]).to be_within(1e-10).of 0.0050700551
+ expect(prob_hash[6]).to be_within(1e-10).of 0.0008717049
+ expect(prob_hash[7]).to be_within(1e-10).of 0.0000989527
+ expect(prob_hash[8]).to be_within(1e-10).of 0.0000058025
+ expect(prob_hash[9]).to be_within(1e-10).of 0.0000001023
+ expect(prob_hash[10]).to be_within(1e-18).of 1e-10
+ expect(prob_hash.values.inject(:+)).to be_within(1e-9).of 1.0
+ end
+ end
+
+ describe '5d10, re-roll and add on 10s, keep best 2' do
+ let(:bunch) do
+ GamesDice::Bunch.new(
+ sides: 10, ndice: 5, keep_mode: :keep_best, keep_number: 2,
+ rerolls: [GamesDice::RerollRule.new(10, :==, :reroll_add)]
+ )
+ end
+
+ it "should simulate rolling five ten-sided 'exploding' dice and adding the best two values" do
+ [16, 24, 17, 28, 12, 21, 16].each do |expected_total|
+ expect(bunch.roll).to eql expected_total
+ expect(bunch.result).to eql expected_total
+ end
+ end
+
+ it 'should concisely explain each result' do
+ ['3, 2, 8, 8, 5. Keep: 8 + 8 = 16',
+ '3, 7, 7, 6, [10+7] 17. Keep: 7 + 17 = 24',
+ '6, 9, 5, 5, 8. Keep: 8 + 9 = 17',
+ '[10+9] 19, 5, 9, 3, 9. Keep: 9 + 19 = 28'].each do |expected_explain|
+ bunch.roll
+ expect(bunch.explain_result).to eql expected_explain
+ end
+ end
+
+ it 'should calculate correct min, max = 2, > 100' do
+ expect(bunch.min).to eql 2
+ expect(bunch.max).to be > 100
+ end
+
+ it 'should have a mean value of roughly 18.986' do
+ expect(bunch.probabilities.expected).to be_within(1e-9).of 18.9859925804
+ end
+
+ it 'should calculate probabilities correctly' do
+ prob_hash = bunch.probabilities.to_h
+ probs = prob_hash.values_at(*2..30)
+ expected_probs = [0.00001, 0.00005, 0.00031, 0.00080, 0.00211, 0.00405, 0.00781, 0.01280, 0.02101, 0.0312,
+ 0.045715, 0.060830, 0.077915, 0.090080, 0.097935, 0.091230, 0.070015, 0.020480, 0.032805,
+ 0.0328, 0.0334626451, 0.0338904805, 0.0338098781, 0.0328226480, 0.0304393461, 0.0260456005,
+ 0.0189361531, 0.0082804480, 0.0103524151]
+
+ probs.zip(expected_probs) do |got_prob, expected_prob|
+ expect(got_prob).to be_within(1e-10).of(expected_prob)
+ end
+
+ expect(prob_hash.values.inject(:+)).to be_within(1e-9).of 1.0
+ end
+ end
+
+ describe 'roll 2d20, keep best value' do
+ let(:bunch) do
+ GamesDice::Bunch.new(
+ sides: 20, ndice: 2, keep_mode: :keep_best, keep_number: 1
+ )
+ end
+
+ it 'should simulate rolling two twenty-sided dice and keeping the best value' do
+ [19, 18, 14, 6, 13, 10, 16].each do |expected_total|
+ expect(bunch.roll).to eql expected_total
+ expect(bunch.result).to eql expected_total
+ end
+ end
+
+ it 'should concisely explain each result' do
+ ['19, 14. Keep: 19',
+ '18, 16. Keep: 18',
+ '5, 14. Keep: 14',
+ '3, 6. Keep: 6'].each do |expected_explain|
+ bunch.roll
+ expect(bunch.explain_result).to eql expected_explain
+ end
+ end
+
+ it 'should calculate correct min, max = 1,20' do
+ expect(bunch.min).to eql 1
+ expect(bunch.max).to eql 20
+ end
+
+ it 'should have a mean value of 13.825' do
+ expect(bunch.probabilities.expected).to be_within(1e-9).of 13.825
+ end
+
+ it 'should calculate probabilities correctly' do
+ prob_hash = bunch.probabilities.to_h
+ expect(prob_hash[1]).to be_within(1e-10).of 1 / 400.0
+ expect(prob_hash[2]).to be_within(1e-10).of 3 / 400.0
+ expect(prob_hash[3]).to be_within(1e-10).of 5 / 400.0
+ expect(prob_hash[4]).to be_within(1e-10).of 7 / 400.0
+ expect(prob_hash[5]).to be_within(1e-10).of 9 / 400.0
+ expect(prob_hash[6]).to be_within(1e-10).of 11 / 400.0
+ expect(prob_hash[7]).to be_within(1e-10).of 13 / 400.0
+ expect(prob_hash[8]).to be_within(1e-10).of 15 / 400.0
+ expect(prob_hash[9]).to be_within(1e-10).of 17 / 400.0
+ expect(prob_hash[10]).to be_within(1e-10).of 19 / 400.0
+ expect(prob_hash[11]).to be_within(1e-10).of 21 / 400.0
+ expect(prob_hash[12]).to be_within(1e-10).of 23 / 400.0
+ expect(prob_hash[13]).to be_within(1e-10).of 25 / 400.0
+ expect(prob_hash[14]).to be_within(1e-10).of 27 / 400.0
+ expect(prob_hash[15]).to be_within(1e-10).of 29 / 400.0
+ expect(prob_hash[16]).to be_within(1e-10).of 31 / 400.0
+ expect(prob_hash[17]).to be_within(1e-10).of 33 / 400.0
+ expect(prob_hash[18]).to be_within(1e-10).of 35 / 400.0
+ expect(prob_hash[19]).to be_within(1e-10).of 37 / 400.0
+ expect(prob_hash[20]).to be_within(1e-10).of 39 / 400.0
+ expect(prob_hash.values.inject(:+)).to be_within(1e-9).of 1.0
+ end
+ end
+
+ describe 'roll 2d20, keep worst value' do
+ let(:bunch) do
+ GamesDice::Bunch.new(
+ sides: 20, ndice: 2, keep_mode: :keep_worst, keep_number: 1
+ )
+ end
+
+ it 'should simulate rolling two twenty-sided dice and keeping the best value' do
+ [14, 16, 5, 3, 7, 5, 9].each do |expected_total|
+ expect(bunch.roll).to eql expected_total
+ expect(bunch.result).to eql expected_total
+ end
+ end
+
+ it 'should concisely explain each result' do
+ ['19, 14. Keep: 14',
+ '18, 16. Keep: 16',
+ '5, 14. Keep: 5',
+ '3, 6. Keep: 3'].each do |expected_explain|
+ bunch.roll
+ expect(bunch.explain_result).to eql expected_explain
+ end
+ end
+
+ it 'should calculate correct min, max = 1,20' do
+ expect(bunch.min).to eql 1
+ expect(bunch.max).to eql 20
+ end
+
+ it 'should have a mean value of 7.175' do
+ expect(bunch.probabilities.expected).to be_within(1e-9).of 7.175
+ end
+
+ it 'should calculate probabilities correctly' do
+ prob_hash = bunch.probabilities.to_h
+ expect(prob_hash[1]).to be_within(1e-10).of 39 / 400.0
+ expect(prob_hash[2]).to be_within(1e-10).of 37 / 400.0
+ expect(prob_hash[3]).to be_within(1e-10).of 35 / 400.0
+ expect(prob_hash[4]).to be_within(1e-10).of 33 / 400.0
+ expect(prob_hash[5]).to be_within(1e-10).of 31 / 400.0
+ expect(prob_hash[6]).to be_within(1e-10).of 29 / 400.0
+ expect(prob_hash[7]).to be_within(1e-10).of 27 / 400.0
+ expect(prob_hash[8]).to be_within(1e-10).of 25 / 400.0
+ expect(prob_hash[9]).to be_within(1e-10).of 23 / 400.0
+ expect(prob_hash[10]).to be_within(1e-10).of 21 / 400.0
+ expect(prob_hash[11]).to be_within(1e-10).of 19 / 400.0
+ expect(prob_hash[12]).to be_within(1e-10).of 17 / 400.0
+ expect(prob_hash[13]).to be_within(1e-10).of 15 / 400.0
+ expect(prob_hash[14]).to be_within(1e-10).of 13 / 400.0
+ expect(prob_hash[15]).to be_within(1e-10).of 11 / 400.0
+ expect(prob_hash[16]).to be_within(1e-10).of 9 / 400.0
+ expect(prob_hash[17]).to be_within(1e-10).of 7 / 400.0
+ expect(prob_hash[18]).to be_within(1e-10).of 5 / 400.0
+ expect(prob_hash[19]).to be_within(1e-10).of 3 / 400.0
+ expect(prob_hash[20]).to be_within(1e-10).of 1 / 400.0
+ expect(prob_hash.values.inject(:+)).to be_within(1e-9).of 1.0
+ end
+ end
+ end
+end