mineSweeper.spec.coffee

# node, jasmine, coffeescript, and rake installed/configured using 
# steps outlined at this website:
# http://brizzled.clapper.org/id/117/index.html

# gem install guard
# gem install guard-shell
# guard init
# then put the following in GuardFile
# guard :shell do
#   watch('.*') {`rake`}
# end

bombs = []
describe "minesweeper bomb cells", ->
  beforeEach ->
    bombs = [[0,0]]
  it "explodes", ->
    expect(play(0,0)).toContain "YOU LOST"
  it "shoud have one nighboring bombs", ->
    expect(play(0,1)).toEqual 1
  it "shouldn't have any nighboring bombs", ->
    expect(play(0,2)).toEqual 0

describe "adjacent cells", ->
  beforeEach ->
    @neighbors = adjacent([0,0])
  it "looks in the negative x direction", ->
    expect(@neighbors).toContain [-1,0]
  it "looks in the negative y direction", ->
    expect(@neighbors).toContain [0,-1]
  it "looks in the positive x direction", ->
    expect(@neighbors).toContain [1,0]
  it "looks in the positive y direction", ->
    expect(@neighbors).toContain [0,1]
  it "looks in the positive y, positive x direction", ->
    expect(@neighbors).toContain [1,1]
  it "looks in the negative y, negative x direction", ->
    expect(@neighbors).toContain [-1,-1]
  it "looks in the positive y, negative x direction", ->
    expect(@neighbors).toContain [-1,1]
  it "looks in the negative y, positive x direction", ->
    expect(@neighbors).toContain [1,-1]

adjacent = (cell) ->
  [
    [cell[0]-1,cell[1]],
    [cell[0],cell[1]-1],
    [cell[0]+1,cell[1]],
    [cell[0],cell[1]+1],
    [cell[0]+1,cell[1]+1],
    [cell[0]-1,cell[1]-1],
    [cell[0]-1,cell[1]+1],
    [cell[0]+1,cell[1]-1],
  ]

play = (x, y) ->
  return "GAME OVER!!! YOU LOST!!!" if bombs.some (c) -> c[0] == x and c[1] == y
  neighboringBombs = intersection bombs, adjacent([x,y])
  neighboringBombs.length

intersection = (a, b) ->
  [a, b] = [b, a] if a.length > b.length
  value for value in a when b.some (c) -> c[0] == value[0] && c[1] == value[1]