exercise completed

.gitignore

@@ -0,0 +1 @@
+*.log

lib/phonebook.rb

@@ -4,4 +4,26 @@ class Phonebook
   def initialize(contacts)
     @contacts = contacts
   end
+
+  def contacts_names
+    contacts.map(&:name)
+  end
+
+  def contacts_phone_numbers
+    contacts.map(&:phone_numbers).flatten
+  end
+
+  def contacts_info
+    contacts.inject({}) do |result, contact|
+      result.merge(contact.name => contact.phone_numbers)
+    end
+  end
+
+  def every_contact_has_phone_number?
+    contacts.all? { |contact| !contact.phone_numbers.nil?}
+  end
+
+  def contacts_without_phone_number
+    contacts.select { |contact| contact.phone_numbers.nil? }
+  end
 end

spec/lib/phonebook_spec.rb

@@ -1,13 +1,34 @@
 require 'spec_helper'
 require './lib/phonebook'
+require './lib/contact'
 
 describe Phonebook do
-  let(:contacts)  { [double('first contact'), double('second contact')] }
+  let(:contact1)  { double('first contact', name: 'first name', phone_numbers: ['3217889909', '6733']) }
+  let(:contact2)  { double('second contact', name: 'second name', phone_numbers: ['32456563']) }
+  let(:contacts)  { [contact1, contact2] }
   let(:phonebook) { Phonebook.new(contacts) }
 
   describe "#contacts" do
     it "returns assigend contacts" do
       expect(phonebook.contacts).to eq(contacts)
     end
   end
+
+  describe "#contact_names" do
+    it "returns list of names" do
+      expect(phonebook.contacts_names).to eq([contact1.name, contact2.name])
+    end
+  end
+
+  describe "#contact_phone_numbers" do
+    it "returns list of contact's numbers" do
+      expect(phonebook.contacts_phone_numbers).to eq([contact1.phone_numbers[0], contact1.phone_numbers[1], contact2.phone_numbers[0]])
+    end
+  end
+
+  describe "#every_contact_has_number" do
+    it "returns that every contact has numbers" do
+      expect(phonebook.every_contact_has_number?).to be_true
+    end
+  end
 end