Initial cut

Gemfile

@@ -1,4 +1,4 @@
 source 'https://rubygems.org'
 
 gem 'rubocop', require: false
-gem 'rspec'
+gem 'rspec'

gem_city.rb

@@ -0,0 +1,50 @@
+# This class represents the town of GemCity
+# This is a town riddled with crime but we can find out how happy the town is
+class GemCity
+  attr_reader :population
+  def initialize
+    @people = {
+      thieves: 5,
+      officers: 1 }
+    @population = 50
+  end
+
+  def thieves(thieves_number = @people[:thieves])
+    @people[:thieves] = thieves_number
+  end
+
+  def officers(officers_number = @people[:officers])
+    @people[:officers] = officers_number
+  end
+
+  def happiness_of_town
+    # happiness is random... people don't know what they want!
+    happiness_vals = (1..@population).collect do
+      rand((100 - successful_crime_rate)..100)
+    end
+    happiness = happiness_vals.reduce(0, :+)
+    happiness / 100
+  end
+
+  def successful_crime_rate
+    thieves = @people[:thieves]
+    officers = @people[:officers]
+    if thieves <= 0 || officers > thieves
+      0
+    else
+      (1 - officers.to_f / thieves.to_f) * 100
+    end
+  end
+
+  def percentage_of_population(group)
+    format('%.0f%', (group.to_f / @population.to_f) * 100.0)
+  end
+
+  def city_demographics
+    civilians = @population - @people[:thieves] - @people[:officers]
+
+    { thieves: percentage_of_population(@people[:thieves]),
+      officers: percentage_of_population(@people[:officers]),
+      civilians: percentage_of_population(civilians) }
+  end
+end

gem_city_spec.rb

@@ -1,5 +1,5 @@
 require 'rspec'
-require_relative 'GemCity' # This line may need to be changed
+require_relative 'gem_city'
 
 describe 'Gem City' do
   let(:city) { GemCity.new }
@@ -16,7 +16,7 @@
 
     it 'officers = thieves' do
       city.thieves 1
-      city.setOfficers 1 # This line may need to be changed
+      city.officers 1
       expect(city.successful_crime_rate).to eq(0)
     end
 
@@ -27,7 +27,7 @@
 
     it 'officers > thieves' do
       city.thieves 1
-      city.setOfficers 2 # This line may need to be changed
+      city.officers 2
       expect(city.successful_crime_rate).to eq(0)
     end
   end
@@ -43,21 +43,21 @@
     end
   end
 
-  # context 'city_demographics' do
-  #   it 'initialize' do
-  #     demographics = city.city_demographics
-  #     expect(demographics[:thieves]).to eq('10%')
-  #     expect(demographics[:officers]).to eq('2%')
-  #     expect(demographics[:civilians]).to eq('88%')
-  #   end
-
-  #   it 'thieves = 10, officers = 25' do
-  #     city.thieves = 10
-  #     city.officers = 25
-  #     demographics = city.city_demographics
-  #     expect(demographics[:thieves]).to eq('20%')
-  #     expect(demographics[:officers]).to eq('50%')
-  #     expect(demographics[:civilians]).to eq('30%')
-  #   end
-  # end
+  context 'city_demographics' do
+    it 'initialize' do
+      demographics = city.city_demographics
+      expect(demographics[:thieves]).to eq('10%')
+      expect(demographics[:officers]).to eq('2%')
+      expect(demographics[:civilians]).to eq('88%')
+    end
+
+    it 'thieves = 10, officers = 25' do
+      city.thieves 10
+      city.officers 25
+      demographics = city.city_demographics
+      expect(demographics[:thieves]).to eq('20%')
+      expect(demographics[:officers]).to eq('50%')
+      expect(demographics[:civilians]).to eq('30%')
+    end
+  end
 end