######################################################################
# tc_close.rb
#
# Test case for the IO#close instance method.
#
# Because there are a limited number of IO file descriptors, I resort
# to using a file descriptor returned by File.new instead. This is
# acceptable to me since File#close is just using the IO#close method
# that it inherited.
######################################################################
require 'test/unit'
require 'test/helper'

class TC_IO_Close_InstanceMethod < Test::Unit::TestCase
   def setup
      @stream = File.new('test.txt', 'w')
      @val = nil
   end

   def test_close
      assert_respond_to(@stream, :close)
      assert_nothing_raised{ @val = @stream.close }
      assert_nil(@val)
      assert_raise(IOError){ @stream.close }
   end

   def test_close_expected_errors
      assert_raise(ArgumentError){ @stream.close(2) }
   end

   def teardown
      @stream = nil
      @val = nil
   end
end
