require 'test/unit' require 'stringio' dir = File.expand_path(__FILE__) 2.times {dir = File.dirname(dir)} $:.replace([File.join(dir, "ruby")] | $:) require 'ut_eof' class TestStringIO < Test::Unit::TestCase include TestEOF def open_file(content) f = StringIO.new(content) yield f end alias open_file_rw open_file include TestEOF::Seek def test_truncate # [ruby-dev:24190] io = StringIO.new("") io.puts "abc" io.truncate(0) io.puts "def" assert_equal("\0\0\0def\n", io.string) end def test_seek_beyond_eof # [ruby-dev:24194] io = StringIO.new n = 100 io.seek(n) io.print "last" assert_equal("\0" * n + "last", io.string) end end