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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
io = StringIO.new("")
io.puts "abc"
io.truncate(0)
io.puts "def"
assert_equal("\0\0\0\0def\n", io.string, "[ruby-dev:24190]")
end
def test_seek_beyond_eof
io = StringIO.new
n = 100
io.seek(n)
io.print "last"
assert_equal("\0" * n + "last", io.string, "[ruby-dev:24194]")
end
def test_overwrite
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, "[ruby-core:3836]")
end
def test_gets
assert_equal(nil, StringIO.new("").gets)
assert_equal("\n", StringIO.new("\n").gets)
assert_equal("a\n", StringIO.new("a\n").gets)
assert_equal("a\n", StringIO.new("a\nb\n").gets)
assert_equal("a", StringIO.new("a").gets)
assert_equal("a\n", StringIO.new("a\nb").gets)
assert_equal("abc\n", StringIO.new("abc\n\ndef\n").gets)
assert_equal("abc\n\ndef\n", StringIO.new("abc\n\ndef\n").gets(nil))
assert_equal("abc\n\n", StringIO.new("abc\n\ndef\n").gets(""))
end
def test_readlines
assert_equal([], StringIO.new("").readlines)
assert_equal(["\n"], StringIO.new("\n").readlines)
assert_equal(["a\n"], StringIO.new("a\n").readlines)
assert_equal(["a\n", "b\n"], StringIO.new("a\nb\n").readlines)
assert_equal(["a"], StringIO.new("a").readlines)
assert_equal(["a\n", "b"], StringIO.new("a\nb").readlines)
assert_equal(["abc\n", "\n", "def\n"], StringIO.new("abc\n\ndef\n").readlines)
assert_equal(["abc\n\ndef\n"], StringIO.new("abc\n\ndef\n").readlines(nil), "[ruby-dev:34591]")
assert_equal(["abc\n\n", "def\n"], StringIO.new("abc\n\ndef\n").readlines(""))
end
end
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