From 848ccfb74e55df32c5731b40cc62f54e0e14bc51 Mon Sep 17 00:00:00 2001
From: Krzysztof Karski <krzysztofk@newshubmedia.com>
Date: Thu, 4 May 2017 17:50:31 +0200
Subject: [PATCH] Proper quine without cheating.

---
 lib/job_interview/quine.rb | 55 +++++++++++++++++++++++++++++++++-----
 spec/quine_spec.rb         | 14 ++++------
 2 files changed, 54 insertions(+), 15 deletions(-)

diff --git a/lib/job_interview/quine.rb b/lib/job_interview/quine.rb
index 00ccad4..9793add 100644
--- a/lib/job_interview/quine.rb
+++ b/lib/job_interview/quine.rb
@@ -1,10 +1,53 @@
 module JobInterview
   module Quine
-    
-    def quine(file = nil)
-      file ||= caller.first.split(':').first
-      return File.read(file)
+    QUOT   = 39.chr
+    SOURCE = [
+      'module JobInterview',
+      '  module Quine',
+      '    QUOT   = 39.chr',
+      '    SOURCE = [',
+      '      ',
+      '    ].freeze',
+      '',
+      '    def quine',
+      '      str = String.new',
+      '',
+      '      0.upto(3) do |i|',
+      '        str << "#{SOURCE[i]}\n"',
+      '      end',
+      '',
+      '      0.upto(SOURCE.length - 1) do |i|',
+      '        str << "#{SOURCE[4]}#{QUOT}#{SOURCE[i]}#{QUOT},\n"',
+      '      end',
+      '',
+      '      5.upto(SOURCE.length - 1) do |i|',
+      '        str << "#{SOURCE[i]}\n"',
+      '      end',
+      '',
+      '      str',
+      '    end',
+      '',
+      '  end',
+      'end',
+    ].freeze
+
+    def quine
+      str = String.new
+
+      0.upto(3) do |i|
+        str << "#{SOURCE[i]}\n"
+      end
+
+      0.upto(SOURCE.length - 1) do |i|
+        str << "#{SOURCE[4]}#{QUOT}#{SOURCE[i]}#{QUOT},\n"
+      end
+
+      5.upto(SOURCE.length - 1) do |i|
+        str << "#{SOURCE[i]}\n"
+      end
+
+      str
     end
-    
+
   end
-end
\ No newline at end of file
+end
diff --git a/spec/quine_spec.rb b/spec/quine_spec.rb
index dd9b8a3..14bb5af 100644
--- a/spec/quine_spec.rb
+++ b/spec/quine_spec.rb
@@ -1,19 +1,15 @@
-require "spec_helper.rb"
+require 'spec_helper.rb'
+
 module QuineSpec
 
-  describe "When called" do
+  describe 'When called' do
     before(:each) do
       @answer = JobInterview::Answer.new
     end
 
-    it "should return the source of the calling file" do
-      @answer.quine(__FILE__).should == File.read(__FILE__)
-    end
-
-    it "should find the calling file if not given" do
-      @answer.quine.should == File.read(__FILE__)
+    it 'should return its own source code' do
+      @answer.quine.should == File.read(File.join(Dir.pwd, 'lib', 'job_interview', 'quine.rb'))
     end
   end
 
-
 end