require 'test_helper'

class SpriteMapTest < Test::Unit::TestCase
  include SpriteHelper
  
  def setup
    Hash.send(:include, Compass::SassExtensions::Functions::Sprites::VariableReader)
    @images_src_path = File.join(File.dirname(__FILE__), '..', '..', 'fixtures', 'sprites', 'public', 'images')
    @images_tmp_path = File.join(File.dirname(__FILE__), '..', '..', 'fixtures', 'sprites', 'public', 'images-tmp')
    FileUtils.cp_r @images_src_path, @images_tmp_path
    config = Compass::Configuration::Data.new('config')
    config.images_path = @images_tmp_path
    Compass.add_configuration(config)
    Compass.configure_sass_plugin!
    @options = {'cleanup' => Sass::Script::Bool.new(true), 'layout' => Sass::Script::String.new('vertical')}
    @base = sprite_map_test(@options)
  end

  def teardown
    FileUtils.rm_r @images_tmp_path
    @base = nil
  end
  
  it "should have the correct size" do
    assert_equal [10,40], @base.size
  end
  
  it "should have the sprite names" do
    assert_equal Compass::SpriteImporter.sprite_names(URI), @base.sprite_names
  end
  
  it 'should have image filenames' do
    assert_equal Dir["#{@images_tmp_path}/selectors/*.png"].sort, @base.image_filenames
  end
  
  it 'should need generation' do
    assert @base.generation_required?
  end
  
  test 'uniqueness_hash' do
    assert_equal 'ef52c5c63a', @base.uniqueness_hash
  end
  
  it 'should be outdated' do
    assert @base.outdated?
  end

  it 'should have correct filename' do
    assert_equal File.join(@images_tmp_path, "#{@base.path}-s#{@base.uniqueness_hash}.png"), @base.filename
  end
  
  it "should return the 'ten-by-ten' image" do
    assert_equal 'ten-by-ten', @base.image_for('ten-by-ten').name
    assert @base.image_for('ten-by-ten').is_a?(Compass::SassExtensions::Sprites::Image)
  end
  
  %w(target hover active).each do |selector|
    it "should have a #{selector}" do
      assert @base.send(:"has_#{selector}?", 'ten-by-ten')
    end
    
    it "should return #{selector} image class" do
      assert_equal "ten-by-ten_#{selector}", @base.image_for('ten-by-ten').send(:"#{selector}").name
    end
    
  end

  it "should generate sprite" do
    @base.generate
    assert File.exists?(@base.filename)
    assert !@base.generation_required?
    assert !@base.outdated?
  end
  
  it "should remove old sprite when generating new" do
    @base.generate
    file = @base.filename
    assert File.exists?(file), "Original file does not exist"
    file_to_remove = File.join(@images_tmp_path, 'selectors', 'ten-by-ten.png')
    FileUtils.rm file_to_remove
    assert !File.exists?(file_to_remove), "Failed to remove sprite file"
    @base = sprite_map_test(@options)
    @base.generate
    assert !File.exists?(file), "Sprite file did not get removed"
  end

  it "should have a vertical layout" do
    assert_equal [0, 10, 20, 30], @base.images.map(&:top)
    assert_equal [0, 0, 0, 0], @base.images.map(&:left)
  end


  # Horizontal tests
  def horizontal
    opts = @options.merge("layout" => Sass::Script::String.new('horizontal'))
    sprite_map_test(opts)
  end
  
  it "should have a horizontal layout" do
    base = horizontal
    assert_equal 10, base.height
    assert_equal 40, base.width
  end
  
  it "should layout images horizontaly" do
    base = horizontal
    assert_equal [0, 10, 20, 30], base.images.map(&:left)
    assert_equal [0, 0, 0, 0], base.images.map(&:top)
  end
  
  it "should generate a horrizontal sprite" do
    base = horizontal
    base.generate
    assert File.exists?(base.filename)
    FileUtils.rm base.filename
  end
  
  it "should generate vertical sprites in decending order" do
    sizes = @base.images.map{|image| File.size(image.file) }
    assert_equal sizes.min, File.size(@base.images.first.file)
    assert_equal sizes.max, File.size(@base.images.last.file)
  end
  
  
end