1

Blog Title:  Limelight Tutorial: Tic Tac Toe Example (Part 4)
Author:      Paul Pagel
Date:        September 29th, 2008

ppagel-20080929-28.rb

it "should make first move in a game" do
  @id = "cell_0_0"
  @cell_one = Limelight::Prop.new
  @scene = MockScene.new
  @scene.register("cell_0_0", @cell_one)
  self.stub!(:scene).and_return(@scene)
  game = mock('game')
  Game.should_receive(:current).and_return(game)
  game.should_receive(:move).with(0, 0)
  game.should_receive(:mark).and_return("X")
  mouse_clicked(nil)
  @cell_one.text.should == "X"
end

ppagel-20080929-29.rb

module Cell  
  def mouse_clicked( event)
    game = Game.current
    x, y = get_coordinates
    game.move(x, y)
    cell_prop = scene.find(id)
    cell_prop.text = game.mark
  end
  private ################################
  def get_coordinates()
    x = id[(id.length - 1)..(id.length - 1)].to_i
    y = id[(id.length - 3)..(id.length - 3)].to_i
    return x, y
  end 
end

ppagel-20080929-30.rb

it "should have message center for feedback to the user" do
  @scene.find("message_center").should_not be(nil)
end

ppagel-20080929-31.rb

main do
  board do
    3.times do |row|
      3.times do |col|
        cell :id => "cell_#{row}_#{col}"
      end
    end
  end  
end
message_center :id => "message_center"

ppagel-20080929-32.rb

it "should display in the message center if the space is occupied." do
  @id = "cell_0_0"
  @cell_one = Limelight::Prop.new
  @message_center = Limelight::Prop.new
  @scene = MockScene.new
  @scene.register("cell_0_0", @cell_one)
  @scene.register("message_center", @message_center)
  self.stub!(:scene).and_return(@scene)
  game = mock('game')
  Game.should_receive(:occupied?).with(0, 0).and_return(true)
  mouse_clicked(nil)
  @message_center.text.should == "This space is occupied, please move in an unoccupied square"
end

ppagel-20080929-33.rb

module Cell
  def mouse_clicked( event)
    game = Game.current
    x, y = get_coordinates
    if game.occupied?(x, y)
      message_center = scene.find("message_center")
      message_center.text = "This space is occupied, please move in an unoccupied square"
    else 
      game.move(x, y)
      cell_prop = scene.find(id)
      cell_prop.text = game.mark
    end
  end
  private ################################
  def get_coordinates()
    x = id[(id.length - 1)..(id.length - 1)].to_i
    y = id[(id.length - 3)..(id.length - 3)].to_i
    return x, y
  end 
end

ppagel-20080929-34.rb

require File.expand_path(File.dirname(__FILE__) + "/../spec_helper")
require 'cell'
describe Cell do
  include Cell
  attr_accessor :id
  before(:each) do
    @id = "cell_0_0"
    @cell_one = Limelight::Prop.new
    @scene = MockScene.new
    @message_center = Limelight::Prop.new
    @scene.register("message_center", @message_center)
    @scene.register("cell_0_0", @cell_one)
    self.stub!(:scene).and_return(@scene)
    @game = mock('game', :occupied? => false) 
    Game.should_receive(:current).and_return(@game)
  end
  it "should make first move in a game" do
    @game.should_receive(:move).with(0, 0)
    @game.should_receive(:mark).and_return("X")
    mouse_clicked(nil)
    @cell_one.text.should == "X"
  end
  it "should display in the message center if the space is occupied." do
    @game.should_receive(:occupied?).with(0, 0).and_return(true)
    mouse_clicked(nil)
    @message_center.text.should == "This space is occupied, please move in an unoccupied square"
  end
end

ppagel-20080929-35.rb

it "should display there was a winner in the message center" do
  @game.should_receive(:move).with(0, 0)
  @game.should_receive(:is_winner?).and_return(true)
  mouse_clicked(nil)
  @message_center.text.should == "Player X has won the game, congratulations"
end

ppagel-20080929-36.rb

module Cell
  def mouse_clicked( event)
    game = Game.current
    x, y = get_coordinates
    if game.occupied?(x, y)
      message_center.text = "This space is occupied, please move in an unoccupied square"
    else 
      game.move(x, y)
      cell_prop = scene.find(id)
      cell_prop.text = game.mark
      message_center.text = "Player #{game.mark} has won the game, congratulations" if game.is_winner?
    end
  end
  private ################################
  def get_coordinates()
    x = id[(id.length - 1)..(id.length - 1)].to_i
    y = id[(id.length - 3)..(id.length - 3)].to_i
    return x, y
  end 
  def message_center
    return scene.find("message_center")
  end
end