p.162 Extract Surrounding Method;before refactoring

chapter6/Extract_Surrounding_Method.rb

@@ -0,0 +1,32 @@
+class Person
+  attr_reader :mother, :children, :name
+
+  def initialize(name, date_of_birth, date_of_death=nil, mother=nil)
+    @name, @mother = name, mother
+    @date_of_birth, @date_of_death = date_of_birth, date_of_death
+    @children = []
+    @mother.add_child(self) if @mother
+  end
+
+  def add_child(child)
+    @children << child
+  end
+
+  def number_of_living_descendants
+    children.inject(0) do |count, child|
+      count += 1 if child.alive?
+      count + child.number_of_living_descendants
+    end
+  end
+
+  def number_of_descendants_named(name)
+    children.inject(0) do |count, child|
+      count += 1 if child.name == name
+      count+ child.number_of_descendants_named(name)
+    end
+  end
+
+  def alive?
+    @date_of_death.nil?
+  end
+end

chapter6/TC_Extract_Surrounding_Method.rb

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+require 'rubygems'
+require 'test/unit'
+require 'must'
+require 'kconv'
+require 'tempfile'
+require 'Extract_Surrounding_Method'
+
+$KCODE="UTF8"
+class TC_Extract_Surrounding_Method < Test::Unit::TestCase
+
+  def assert(status,msg)
+    if(RUBY_PLATFORM.downcase =~ /mswin(?!ce)|mingw|cygwin|bccwin/)
+      msg=Kconv.tosjis(msg)
+    end
+    super(status,msg)
+  end
+
+  def setup
+    @kokeka = Person.new('Kokeka', '2007-09-05',nil, nil)
+    @kokeko1 = Person.new('Kokeko', '2007-10-05', nil, @kokeka)
+    @kokekakiikii1 = Person.new('Kokekakiikii', '2007-10-05', nil, @kokeka)
+    @kokeko2 = Person.new('Kokeko', '2007-11-05', nil, @kokeko1)
+    @kokekakiikii2 = Person.new('Kokeikakiikii', '2007-11-05', nil, @kokeko1)
+    @kokekokko = Person.new('Kokekokko', '2007-12-05', nil, @kokeko2)
+    @kokkokkokko = Person.new('Kokkokkokko','2007-12-05', nil, @kokeko2)
+  end
+
+  must "test1" do
+    assert_equal(6, @kokeka.number_of_living_descendants)
+    assert_equal(2, @kokeka.number_of_descendants_named('Kokeko'))
+  end
+end