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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\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
def test_overwrite # [ruby-core:03836]
stringio = StringIO.new
responses = ['', 'just another ruby', 'hacker']
responses.each do |resp|
stringio.puts(resp)
stringio.rewind
end
assert_equal("hacker\nother ruby\n", stringio.string)
end
end
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