require File.dirname(__FILE__) + '/test_helper'

class WebService
  attr_accessor :output
  def get(url)
    @output
  end
  def with_hash(what, hash)
    @output
  end
end

class CacheTest < Test::Unit::TestCase
  def teardown
    ENV.delete 'CACHE_RESULT'
    ENV.delete 'NO_CACHE'
  end
  
  def test_cache_result_of_with_cache
    WebService.cache_result_of :get
    
    web = WebService.new
    web.output = 'uncached'
    assert_equal 'cached', web.get('http://macournoyer.wordpress.com')
  end
  
  def test_cache_result_of_with_no_cache
    ENV['NO_CACHE'] = 'true'
    WebService.cache_result_of :get
    
    web = WebService.new
    web.output = 'uncached'
    assert_equal 'uncached', web.get('http://macournoyer.wordpress.com')
  end
  
  def test_cache_result_writes_to_file
    ENV['CACHE_RESULT'] = 'true'
    WebService.cache_result_of :get
    
    web = WebService.new
    web.output = 'uncached'
    File.expects(:open).once.with("#{WebService.fixture_path}/web_service/http---macournoyer-wordpress-com", 'w').yields({})
    assert_equal 'uncached', web.get('http://macournoyer.wordpress.com')
  end
  
  def test_fixture_file_name_with_hash_argument
    ENV['CACHE_RESULT'] = 'true'
    WebService.cache_result_of :with_hash
    
    web = WebService.new
    web.output = 'uncached'
    File.expects(:open).once.with("#{WebService.fixture_path}/web_service/hi-a-a-z-z", 'w').yields({})
    assert_equal 'uncached', web.with_hash('hi', :z => 'z', :a => 'a')
  end
end