game_of_life_test.rb

# Rules 
#   each cell 2 possible states, life of death 
#   8 neighbours 
#    - any life cell < 2 neighbours dies 
#    - any life cell > 3 neighbours dies
#    - any live cell with 2 or 3 neighbours lives to next generation
#    - any dead cell with exactly 3 live neighbours becomes a live cell
# first generation: apply pattern
# 

### EXAMPLE ##########################################################################################################
# WRITE YOUR OWN TESTS, OF COURSE
# test-driven development is the best, this is just to show you how it should work (if it's not clear from rules)
# Plus varying parameters on initialization allows you to do cooler things, like play with different sizes, seeds, etc.
#######################################################################################################################


require File.join(File.dirname(__FILE__), 'game_of_life')
require 'rubygems'
require 'test/unit'

class GameOfLifeTest < Test::Unit::TestCase

  def setup
    @game = GameOfLife.new(3)
  end

  def test_should_kill_with_no_neighbours
    @game.state = [[1,0,0],[0,0,0],[0,0,0]]
    after = @game.evolve
    assert_equal after[0][0], 0
  end

  def test_should_kill_with_just_one_neighbour
    @game.state = [[0,0,0],[1,0,0],[1,0,0]]
    after = @game.evolve
    assert_equal after[1][0], 0
    assert_equal after[2][0], 0
  end

  def test_should_kill_with_more_than_3_neighbours
    @game.state = [[1,1,1],[1,1,1],[1,1,1]]
    after = @game.evolve
    assert_equal after, [[0,0,0],[0,0,0],[0,0,0]]
  end

  def test_should_give_birth_if_3_neighbours
    @game.state = [[1,0,0],[1,1,0],[0,0,0]]
    after = @game.evolve
    assert_equal after, [[1,1,1],[1,1,1],[1,1,1]]
  end

end