Bowling challenge

.rspec

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+--require spec_helper

Gemfile

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+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+# gem "rails"
+
+gem "rspec", "~> 3.12"

Gemfile.lock

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+GEM
+  remote: https://rubygems.org/
+  specs:
+    diff-lcs (1.5.0)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-core (3.12.1)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.4)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.0)
+
+PLATFORMS
+  arm64-darwin-21
+
+DEPENDENCIES
+  rspec (~> 3.12)
+
+BUNDLED WITH
+   2.4.7

lib/frame.rb

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+# class Frame
+# #   attr_reader :rolls
+
+# #   def initialize
+# #     @rolls = []
+# #   end
+
+# #   def add_roll(pins)
+# #     @rolls << pins
+# #   end
+
+# #   def score
+# #     @rolls.sum
+# #   end
+
+# #   # def strike?
+# #   #   @rolls.first == 10
+# #   # end
+
+# #   # def spare?
+# #   #   @rolls.sum == 10 && @rolls.first != 10
+# #   # end
+
+# #   def complete?
+# #     @rolls.length == 2 || strike?
+# #   end
+
+# end

lib/scorecard.rb

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+class Scorecard
+  def initialize
+    @rolls = []
+  end
+
+  def roll(pins)
+    @rolls << pins
+  end
+
+  def score
+    total_score = 0
+    roll_index = 0
+
+    10.times do
+      if strike?(roll_index)
+        total_score += 10 + strike_bonus(roll_index)
+        roll_index += 1
+        p total_score
+      elsif spare?(roll_index)
+        total_score += 10 + spare_bonus(roll_index)
+        roll_index += 2
+        p total_score
+      else
+        total_score += frame_score(roll_index)
+        roll_index += 2
+        p total_score
+      end
+    end
+
+    p total_score
+  end
+
+  private
+
+  def strike?(roll_index)
+    @rolls[roll_index] == 10
+  end
+
+  def spare?(roll_index)
+    frame_score(roll_index) == 10
+  end
+
+  def strike_bonus(roll_index)
+    @rolls[roll_index + 1] + @rolls[roll_index + 2]
+  end
+
+  def spare_bonus(roll_index)
+    @rolls[roll_index + 2]
+  end
+
+  def frame_score(roll_index)
+    @rolls[roll_index] + @rolls[roll_index + 1]
+  end
+end

spec/frame_spec.rb

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+# require 'frame'
+
+# RSpec.describe Frame do 
+#   xit "adds the total roll score to the frame when 2 rolls" do 
+#     subject.add_roll(4)
+#     subject.add_roll(4)
+#     expect(subject.score).to eq 8
+#   end
+
+#   xit "returns true if a strike" do 
+#     subject.add_roll(10)
+#     expect(subject.strike?).to eq true
+#   end
+
+#   xit "returns true if a spare" do
+#    subject.add_roll(6)
+#    subject.add_roll(4)
+#    expect(subject.spare?).to eq true
+#   end
+
+#   xit "returns true if game complete" do
+#     subject.add_roll(10)
+#     expect(subject.complete?).to eq true
+#   end
+# end
+

spec/scorecard_spec.rb

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+require 'scorecard'
+
+
+RSpec.describe Scorecard do
+  let(:scorecard) { Scorecard.new }
+
+  it "scores a gutter game correctly" do
+    20.times { scorecard.roll(0) }
+    expect(scorecard.score).to eq(0)
+  end
+
+  it "calculates correct score when there are no strikes or spares" do
+      20.times { scorecard.roll(4) }
+      expect(scorecard.score).to eq (80)
+  end
+
+  it "calculates the correct score for a game with only spares" do
+    10.times do
+      scorecard.roll(5)
+      scorecard.roll(5)
+    end
+    scorecard.roll(5) 
+    expect(scorecard.score).to eq(150)
+  end
+
+  it "calculates the correct score for a perfect game" do
+    12.times { scorecard.roll(10) }
+    expect(scorecard.score).to eq (300)
+  end
+
+  xit "calculates the correct score for a game with a mix of strikes and spares" do
+    rolls = [10, 4, 6, 7, 2, 10, 5, 5, 0, 10, 10, 2, 8, 9, 1, 10, 10, 8, 2]
+    rolls.each { |pins| scorecard.roll(pins) }
+    expect(scorecard.score).to eq(199)
+  end
+end
+
+

spec/spec_helper.rb

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+# This file was generated by the `rspec --init` command. Conventionally, all
+# specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
+# The generated `.rspec` file contains `--require spec_helper` which will cause
+# this file to always be loaded, without a need to explicitly require it in any
+# files.
+#
+# Given that it is always loaded, you are encouraged to keep this file as
+# light-weight as possible. Requiring heavyweight dependencies from this file
+# will add to the boot time of your test suite on EVERY test run, even for an
+# individual file that may not need all of that loaded. Instead, consider making
+# a separate helper file that requires the additional dependencies and performs
+# the additional setup, and require it from the spec files that actually need
+# it.
+#
+# See https://rubydoc.info/gems/rspec-core/RSpec/Core/Configuration
+RSpec.configure do |config|
+  # rspec-expectations config goes here. You can use an alternate
+  # assertion/expectation library such as wrong or the stdlib/minitest
+  # assertions if you prefer.
+  config.expect_with :rspec do |expectations|
+    # This option will default to `true` in RSpec 4. It makes the `description`
+    # and `failure_message` of custom matchers include text for helper methods
+    # defined using `chain`, e.g.:
+    #     be_bigger_than(2).and_smaller_than(4).description
+    #     # => "be bigger than 2 and smaller than 4"
+    # ...rather than:
+    #     # => "be bigger than 2"
+    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
+  end
+
+  # rspec-mocks config goes here. You can use an alternate test double
+  # library (such as bogus or mocha) by changing the `mock_with` option here.
+  config.mock_with :rspec do |mocks|
+    # Prevents you from mocking or stubbing a method that does not exist on
+    # a real object. This is generally recommended, and will default to
+    # `true` in RSpec 4.
+    mocks.verify_partial_doubles = true
+  end
+
+  # This option will default to `:apply_to_host_groups` in RSpec 4 (and will
+  # have no way to turn it off -- the option exists only for backwards
+  # compatibility in RSpec 3). It causes shared context metadata to be
+  # inherited by the metadata hash of host groups and examples, rather than
+  # triggering implicit auto-inclusion in groups with matching metadata.
+  config.shared_context_metadata_behavior = :apply_to_host_groups
+
+# The settings below are suggested to provide a good initial experience
+# with RSpec, but feel free to customize to your heart's content.
+=begin
+  # This allows you to limit a spec run to individual examples or groups
+  # you care about by tagging them with `:focus` metadata. When nothing
+  # is tagged with `:focus`, all examples get run. RSpec also provides
+  # aliases for `it`, `describe`, and `context` that include `:focus`
+  # metadata: `fit`, `fdescribe` and `fcontext`, respectively.
+  config.filter_run_when_matching :focus
+
+  # Allows RSpec to persist some state between runs in order to support
+  # the `--only-failures` and `--next-failure` CLI options. We recommend
+  # you configure your source control system to ignore this file.
+  config.example_status_persistence_file_path = "spec/examples.txt"
+
+  # Limits the available syntax to the non-monkey patched syntax that is
+  # recommended. For more details, see:
+  # https://relishapp.com/rspec/rspec-core/docs/configuration/zero-monkey-patching-mode
+  config.disable_monkey_patching!
+
+  # This setting enables warnings. It's recommended, but in some cases may
+  # be too noisy due to issues in dependencies.
+  config.warnings = true
+
+  # Many RSpec users commonly either run the entire suite or an individual
+  # file, and it's useful to allow more verbose output when running an
+  # individual spec file.
+  if config.files_to_run.one?
+    # Use the documentation formatter for detailed output,
+    # unless a formatter has already been configured
+    # (e.g. via a command-line flag).
+    config.default_formatter = "doc"
+  end
+
+  # Print the 10 slowest examples and example groups at the
+  # end of the spec run, to help surface which specs are running
+  # particularly slow.
+  config.profile_examples = 10
+
+  # Run specs in random order to surface order dependencies. If you find an
+  # order dependency and want to debug it, you can fix the order by providing
+  # the seed, which is printed after each run.
+  #     --seed 1234
+  config.order = :random
+
+  # Seed global randomization in this process using the `--seed` CLI option.
+  # Setting this allows you to use `--seed` to deterministically reproduce
+  # test failures related to randomization by passing the same `--seed` value
+  # as the one that triggered the failure.
+  Kernel.srand config.seed
+=end
+end