require File.expand_path(File.dirname(__FILE__) + '/helper')
require 'property_sets/casting'

class TestCasting < ActiveSupport::TestCase

  context "Casting#read" do
    should "return nil when given value nil regardless of type" do
      assert_equal nil, PropertySets::Casting.read(:string, nil)
      assert_equal nil, PropertySets::Casting.read(:hello, nil)
    end

    should "leave serialized data alone" do
      assert_equal [1,2,3], PropertySets::Casting.read(:serialized, [1, 2, 3])
    end
  end

  context "Casting#write" do
    should "return nil when given value nil regardless of type" do
      assert_equal nil, PropertySets::Casting.write(:string, nil)
      assert_equal nil, PropertySets::Casting.write(:hello, nil)
    end

    should "convert time instances to UTC" do
      time = Time.now.in_time_zone("CET")
      assert PropertySets::Casting.write(:datetime, time) =~ /UTC$/
    end

    should "convert integers to strings" do
      assert_equal "123", PropertySets::Casting.write(:integer, 123)
    end

    should "leave serialized data alone for the record to deal with" do
      a = [123]
      assert_equal a, PropertySets::Casting.write(:serialized, a)
    end
  end

end