Test some aspects of marshalling using JRuby 1.6RC1

test_marshalling.rb

require 'test/unit'
require 'tempfile'
require 'ostruct'

class Test::Unit::TestCase

  def marshalled(obj)
    tmp = Tempfile.new('marshal')
    tmp.puts Marshal.dump(obj)
    tmp.close

    File.open(tmp.path, 'r'){|f| Marshal.load(f)}
  end

end

class BasicClass
  attr_accessor :name
end

class TestMarshal < Test::Unit::TestCase

  def setup
    #
  end

  def test_string
    s = "the string"
    assert_equal s, marshalled(s)
  end

  def test_integer
    n = 2
    assert_equal n, marshalled(n)
  end

  def test_float
    n = 1.2
    assert_equal n, marshalled(n)
  end

  def test_basic_class
    bc = BasicClass.new
    bc.name = "basic_class"

    mbc = marshalled(bc)

    assert mbc.is_a? BasicClass
    assert_equal bc.name, mbc.name
  end

  def test_basic_openstruct
    os = OpenStruct.new
    os.name ="openstruct"
    os.num = 5

    mos = marshalled(os)

    assert mos.is_a? OpenStruct
    assert_equal os.name, mos.name
    assert_equal os.num, mos.num
  end

  def test_less_basic_openstruct
    os = OpenStruct.new
    os.name = "openstruct2"
    os.obj = BasicClass.new
    os.obj.name = "enclosed_object"

    mos = marshalled(os)

    assert mos.is_a? OpenStruct
    assert_equal os.name, mos.name
    assert mos.obj.is_a? BasicClass
    assert_equal os.obj.name, mos.obj.name
  end

end

I can get this to pass on Windows if I change the marshalled helper to look like this:

def marshalled(obj)
  tmp = Tempfile.new('marshal')
  tmp.puts Marshal.dump(obj)
  # tmp.write Marshal.dump(obj) # <<-- both puts and write are ok
  tmp.close

  # File.open(tmp.path, 'r'){|f| Marshal.load(f)} # <<-- Fails on Windows
  File.open(tmp.path, 'r'){ |f| Marshal.load(f.read) } # <<-- Works all around
end

Notice that passing the file to Marshal.load is no good while doing file.read works.