Test Problem

.rvmrc

#!/usr/bin/env bash

# This is an RVM Project .rvmrc file, used to automatically load the ruby
# development environment upon cd'ing into the directory

# First we specify our desired <ruby>[@<gemset>], the @gemset name is optional,
# Only full ruby name is supported here, for short names use:
#     echo "rvm use 1.9.3" > .rvmrc
environment_id="ruby-1.9.3-p0@cincirb_katas"

#
# Uncomment the following lines if you want to verify rvm version per project
#
# rvmrc_rvm_version="1.10.2" # 1.10.1 seams as a safe start
# eval "$(echo ${rvm_version}.${rvmrc_rvm_version} | awk -F. '{print "[[ "$1*65536+$2*256+$3" -ge "$4*65536+$5*256+$6" ]]"}' )" || {
#   echo "This .rvmrc file requires at least RVM ${rvmrc_rvm_version}, aborting loading."
#   return 1
# }
#

#
# Uncomment following line if you want options to be set only for given project.
#
# PROJECT_JRUBY_OPTS=( --1.9 )
#
# The variable PROJECT_JRUBY_OPTS requires the following to be run in shell:
#
#    chmod +x ${rvm_path}/hooks/after_use_jruby_opts
#

#
# First we attempt to load the desired environment directly from the environment
# file. This is very fast and efficient compared to running through the entire
# CLI and selector. If you want feedback on which environment was used then
# insert the word 'use' after --create as this triggers verbose mode.
#
if [[ -d "${rvm_path:-$HOME/.rvm}/environments" \
  && -s "${rvm_path:-$HOME/.rvm}/environments/$environment_id" ]]
then
  \. "${rvm_path:-$HOME/.rvm}/environments/$environment_id"

  if [[ -s "${rvm_path:-$HOME/.rvm}/hooks/after_use" ]]
  then
    . "${rvm_path:-$HOME/.rvm}/hooks/after_use"
  fi
else
  # If the environment file has not yet been created, use the RVM CLI to select.
  if ! rvm --create  "$environment_id"
  then
    echo "Failed to create RVM environment '${environment_id}'."
    return 1
  fi
fi

#
# If you use an RVM gemset file to install a list of gems (*.gems), you can have
# it be automatically loaded. Uncomment the following and adjust the filename if
# necessary.
#
# filename=".gems"
# if [[ -s "$filename" ]]
# then
#   rvm gemset import "$filename" | grep -v already | grep -v listed | grep -v complete | sed '/^$/d'
# fi

# If you use bundler, this might be useful to you:
# if [[ -s Gemfile ]] && ! command -v bundle >/dev/null
# then
#   printf "%b" "The rubygem 'bundler' is not installed. Installing it now.\n"
#   gem install bundler
# fi
# if [[ -s Gemfile ]] && command -v bundle
# then
#   bundle install
# fi

if [[ $- == *i* ]] # check for interactive shells
then
    echo "Using: $(tput setaf 2)$GEM_HOME$(tput sgr0)" # show the user the ruby and gemset they are using in green
else 
	echo "Using: $GEM_HOME" # don't use colors in interactive shells
fi

urinal_etiquette.rb

# Post your solution here

class UrinalEttiquette

  def self.destination_stall(stalls, line)
    unoccupied_stalls = []

    stalls.each_with_index do |stall_occupied, index|
      next_to_a_dude = stalls[index - 1]

      if !stall_occupied
        unoccupied_stalls << index
      end

      unless stall_occupied || next_to_a_dude
        return index
      end
    end

    if line || rules_broken?(stalls)
      return unoccupied_stalls.min
    else
      return nil
    end

    raise "should not get here"
  end

  def self.rules_broken?(stalls)
    rules_broken = false

    stalls.each_with_index do |stall_occupied, index|
      next_to_a_dude = stalls[index - 1]
      next_to_another_dude = stalls[index + 1]

      if index == 0
        next_to_a_dude = false
      end

      if next_to_another_dude && next_to_a_dude
        rules_broken = true
        break
      end
    end

    rules_broken
  end

end

urinal_etiquette_test.rb

require_relative './urinal_etiquette'
require 'test/unit'

class UrinalEtiquetteTest < Test::Unit::TestCase

  def test_destination_stall_all_empty
    stalls = [false, false, false, false, false]
    assert_equal 0, UrinalEttiquette.destination_stall(stalls, false)
  end

  def test_destination_stall_furthest_occupied
    stalls = [true, false, false, false, false]
    assert_equal 2, UrinalEttiquette.destination_stall(stalls, false)
  end

  def test_destination_stall_furthest_and_middle_occupied
    stalls = [true, false, true, false, false]
    assert_equal 4, UrinalEttiquette.destination_stall(stalls, false)
  end

  def test_destination_stall_furthest_and_middle_and_end_occupied_with_line
    stalls = [true, false, true, false, true]
    assert_equal 1, UrinalEttiquette.destination_stall(stalls, true)
  end

  def test_destination_stall_with_even_with_line
    stalls = [true, false, true, false]
    assert_equal 1, UrinalEttiquette.destination_stall(stalls, true)
  end

  def test_destination_stall_with_even_more_occupied
    stalls = [true, true, true, false]
    assert_equal 3, UrinalEttiquette.destination_stall(stalls, false)
  end

  def test_destination_stall_with_even_more_occupied_with_line
    stalls = [true, true, true, false]
    assert_equal 3, UrinalEttiquette.destination_stall(stalls, true)
  end

  def test_destination_stall_furthest_and_middle_and_end_occupied
    stalls = [true, false, true, false, true]
    assert_equal false, UrinalEttiquette.rules_broken?(stalls)
    assert_equal nil, UrinalEttiquette.destination_stall(stalls, false)
  end

  def test_destination_stall_with_even
    stalls = [true, false, true, false]
    assert_equal nil, UrinalEttiquette.destination_stall(stalls, false)
  end

end