1require 'spec_helper'
  2
  3
  4class Blah
  5end
  6
  7module LifeBoat
  8  class Boat
  9  end
 10end
 11
 12module Lifeboat
 13  class Ship
 14  end
 15end
 16
 17module ExposeBinding
 18  def get_binding
 19    binding
 20  end
 21end
 22
 23module LifeBoat
 24  class FloatationDevice
 25  end
 26end
 27
 28module Queryable
 29  def matches?
 30    each do |item|
 31      result = yield(item) if block_given?
 32      return item if result
 33    end
 34    nil
 35  end 
 36end
 37
 38
 39class Book
 40  attr_reader :title
 41  
 42  def initialize(title)
 43    @title = title
 44  end
 45end
 46
 47class Library
 48  include Queryable
 49
 50  def initialize(books = [])
 51    @books = books
 52  end
 53  
 54  def add(book)
 55    @books.push(book)
 56  end
 57  
 58  def has_book?(title)
 59    matches? do |book|
 60      book.title == title
 61    end
 62  end
 63  
 64  private
 65  
 66  def each
 67    @books.each do |book|
 68      yield book
 69    end
 70  end  
 71end
 72
 73describe "modules" do
 74  it "can float" do
 75    device = LifeBoat::FloatationDevice.new
 76    device.should_not be_nil
 77  end
 78  
 79  context "Library" do
 80    let(:library) { Library.new }
 81    
 82    before :each do
 83      library.add(Book.new("roots"))
 84      library.add(Book.new("the life of pie"))
 85      library.add(Book.new("the curious incident of the dog in the night time"))
 86    end
 87    
 88    it "can find all items that match" do
 89      library.has_book?("the curious incident of the dog in the night time").should be_true
 90    end
 91    
 92    it "should return false if the book is not in the library" do
 93      library.has_book?("george of the jungle").should be_false
 94    end
 95    
 96    it "should tell how many books are in the library" do
 97      library.extend(Enumerable)
 98      library.count.should == 3
 99    end
100  end
101end