#!/usr/bin/env ruby

require 'test/unit'
require File.dirname(__FILE__) + '/../../lib/sass'

RAILS_ENV  = 'testing'

require 'sass/plugin'

class SassPluginTest < Test::Unit::TestCase
  @@templates = %w{ complex constants }

  def setup
    Sass::Plugin.options = {
      :template_location => File.dirname(__FILE__) + '/templates',
      :css_location => File.dirname(__FILE__) + '/tmp',
      :style => :compact
    }
    Sass::Plugin.options[:always_update] = true
    
    Sass::Plugin.update_stylesheets
  end
  
  def teardown
    File.delete(*Dir[tempfile_loc('*')])
  end

  def test_templates_should_render_correctly
    @@templates.each { |name| assert_renders_correctly(name) }
  end
  
  def test_no_update
    File.delete(tempfile_loc('basic'))
    assert Sass::Plugin.stylesheet_needs_update?('basic')
    Sass::Plugin.update_stylesheets
    assert !Sass::Plugin.stylesheet_needs_update?('basic')
  end
  
  def test_exception_handling
    File.delete(tempfile_loc('bork'))
    Sass::Plugin.update_stylesheets
    File.open(tempfile_loc('bork')) do |file|
      assert_equal("/*\nSass::SyntaxError: Undefined constant: \"!bork\"\non line 2 of #{File.dirname(__FILE__) + '/templates/bork.sass'}\n\n1: bork\n2:   :bork= !bork", file.read.split("\n")[0...6].join("\n"))
    end
    File.delete(tempfile_loc('bork'))
  end

  def test_production_exception_handling
    Sass.const_set('RAILS_ENV', 'production')

    File.delete(tempfile_loc('bork'))
    Sass::Plugin.update_stylesheets
    assert_equal("/* Internal stylesheet error */", File.read(tempfile_loc('bork')))
    File.delete(tempfile_loc('bork'))

    Sass::Plugin.const_set('RAILS_ENV', 'testing')
  end
  
  def test_controller_process
    File.delete(tempfile_loc('basic'))
    assert Sass::Plugin.stylesheet_needs_update?('basic')
    
    ActionController::Base.new.process
    
    assert !Sass::Plugin.stylesheet_needs_update?('basic')
  end

 private
 
  def assert_renders_correctly(name)
    File.read(result_loc(name)).split("\n").zip(File.read(tempfile_loc(name)).split("\n")).each_with_index do |pair, line|
      message = "template: #{name}\nline:     #{line + 1}"
      assert_equal(pair.first, pair.last, message)
    end
  end
  
  def tempfile_loc(name)
    File.dirname(__FILE__) + "/tmp/#{name}.css"
  end
  
  def result_loc(name)
    File.dirname(__FILE__) + "/results/#{name}.css"
  end
end

module Sass::Plugin
  class << self
    public :stylesheet_needs_update?
  end
end

class Sass::Engine
  alias_method :old_render, :render
  
  def render
    raise "bork bork bork!" if @template[0] == "{bork now!}"
    old_render
  end
end

class ActionController::Base
  def sass_old_process(*args); end
end