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ruby--ruby/test/logger/test_logdevice.rb
usa 58b3f36546 revert r60999
* test/logger/test_logdevice.rb: revert r60999 because it was caused by not
  committed changes.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61002 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-12-04 00:23:31 +00:00

838 lines
23 KiB
Ruby

# coding: US-ASCII
# frozen_string_literal: false
require 'test/unit'
require 'logger'
require 'tempfile'
require 'tmpdir'
class TestLogDevice < Test::Unit::TestCase
class LogExcnRaiser
def write(*arg)
raise 'disk is full'
end
def close
end
def stat
Object.new
end
end
def setup
@tempfile = Tempfile.new("logger")
@tempfile.close
@filename = @tempfile.path
File.unlink(@filename)
end
def teardown
@tempfile.close(true)
end
def d(log, opt = {})
Logger::LogDevice.new(log, opt)
end
def test_initialize
logdev = d(STDERR)
assert_equal(STDERR, logdev.dev)
assert_nil(logdev.filename)
assert_raise(TypeError) do
d(nil)
end
#
logdev = d(@filename)
begin
assert_file.exist?(@filename)
assert_predicate(logdev.dev, :sync)
assert_equal(@filename, logdev.filename)
logdev.write('hello')
ensure
logdev.close
end
# create logfile whitch is already exist.
logdev = d(@filename)
begin
logdev.write('world')
logfile = File.read(@filename)
assert_equal(2, logfile.split(/\n/).size)
assert_match(/^helloworld$/, logfile)
ensure
logdev.close
end
end
def test_write
r, w = IO.pipe
logdev = d(w)
logdev.write("msg2\n\n")
IO.select([r], nil, nil, 0.1)
w.close
msg = r.read
r.close
assert_equal("msg2\n\n", msg)
#
logdev = d(LogExcnRaiser.new)
class << (stderr = '')
alias write concat
end
$stderr, stderr = stderr, $stderr
begin
assert_nothing_raised do
logdev.write('hello')
end
ensure
logdev.close
$stderr, stderr = stderr, $stderr
end
assert_equal "log writing failed. disk is full\n", stderr
end
def test_close
r, w = IO.pipe
logdev = d(w)
logdev.write("msg2\n\n")
IO.select([r], nil, nil, 0.1)
assert_not_predicate(w, :closed?)
logdev.close
assert_predicate(w, :closed?)
r.close
end
def test_reopen_io
logdev = d(STDERR)
old_dev = logdev.dev
logdev.reopen
assert_equal(STDERR, logdev.dev)
assert_not_predicate(old_dev, :closed?)
end
def test_reopen_io_by_io
logdev = d(STDERR)
old_dev = logdev.dev
logdev.reopen(STDOUT)
assert_equal(STDOUT, logdev.dev)
assert_not_predicate(old_dev, :closed?)
end
def test_reopen_io_by_file
logdev = d(STDERR)
old_dev = logdev.dev
logdev.reopen(@filename)
begin
assert_file.exist?(@filename)
assert_equal(@filename, logdev.filename)
assert_not_predicate(old_dev, :closed?)
ensure
logdev.close
end
end
def test_reopen_file
logdev = d(@filename)
old_dev = logdev.dev
logdev.reopen
begin
assert_file.exist?(@filename)
assert_equal(@filename, logdev.filename)
assert_predicate(old_dev, :closed?)
ensure
logdev.close
end
end
def test_reopen_file_by_io
logdev = d(@filename)
old_dev = logdev.dev
logdev.reopen(STDOUT)
assert_equal(STDOUT, logdev.dev)
assert_nil(logdev.filename)
assert_predicate(old_dev, :closed?)
end
def test_reopen_file_by_file
logdev = d(@filename)
old_dev = logdev.dev
tempfile2 = Tempfile.new("logger")
tempfile2.close
filename2 = tempfile2.path
File.unlink(filename2)
logdev.reopen(filename2)
begin
assert_file.exist?(filename2)
assert_equal(filename2, logdev.filename)
assert_predicate(old_dev, :closed?)
ensure
logdev.close
tempfile2.close(true)
end
end
def test_shifting_size
tmpfile = Tempfile.new([File.basename(__FILE__, '.*'), '_1.log'])
logfile = tmpfile.path
logfile0 = logfile + '.0'
logfile1 = logfile + '.1'
logfile2 = logfile + '.2'
logfile3 = logfile + '.3'
tmpfile.close(true)
File.unlink(logfile) if File.exist?(logfile)
File.unlink(logfile0) if File.exist?(logfile0)
File.unlink(logfile1) if File.exist?(logfile1)
File.unlink(logfile2) if File.exist?(logfile2)
logger = Logger.new(logfile, 4, 100)
logger.error("0" * 15)
assert_file.exist?(logfile)
assert_file.not_exist?(logfile0)
logger.error("0" * 15)
assert_file.exist?(logfile0)
assert_file.not_exist?(logfile1)
logger.error("0" * 15)
assert_file.exist?(logfile1)
assert_file.not_exist?(logfile2)
logger.error("0" * 15)
assert_file.exist?(logfile2)
assert_file.not_exist?(logfile3)
logger.error("0" * 15)
assert_file.not_exist?(logfile3)
logger.error("0" * 15)
assert_file.not_exist?(logfile3)
logger.close
File.unlink(logfile)
File.unlink(logfile0)
File.unlink(logfile1)
File.unlink(logfile2)
tmpfile = Tempfile.new([File.basename(__FILE__, '.*'), '_2.log'])
logfile = tmpfile.path
logfile0 = logfile + '.0'
logfile1 = logfile + '.1'
logfile2 = logfile + '.2'
logfile3 = logfile + '.3'
tmpfile.close(true)
logger = Logger.new(logfile, 4, 150)
logger.error("0" * 15)
assert_file.exist?(logfile)
assert_file.not_exist?(logfile0)
logger.error("0" * 15)
assert_file.not_exist?(logfile0)
logger.error("0" * 15)
assert_file.exist?(logfile0)
assert_file.not_exist?(logfile1)
logger.error("0" * 15)
assert_file.not_exist?(logfile1)
logger.error("0" * 15)
assert_file.exist?(logfile1)
assert_file.not_exist?(logfile2)
logger.error("0" * 15)
assert_file.not_exist?(logfile2)
logger.error("0" * 15)
assert_file.exist?(logfile2)
assert_file.not_exist?(logfile3)
logger.error("0" * 15)
assert_file.not_exist?(logfile3)
logger.error("0" * 15)
assert_file.not_exist?(logfile3)
logger.error("0" * 15)
assert_file.not_exist?(logfile3)
logger.close
File.unlink(logfile)
File.unlink(logfile0)
File.unlink(logfile1)
File.unlink(logfile2)
end
def test_shifting_age_variants
logger = Logger.new(@filename, 'daily')
logger.info('daily')
logger.close
logger = Logger.new(@filename, 'weekly')
logger.info('weekly')
logger.close
logger = Logger.new(@filename, 'monthly')
logger.info('monthly')
logger.close
end
def test_shifting_age
# shift_age other than 'daily', 'weekly', and 'monthly' means 'everytime'
yyyymmdd = Time.now.strftime("%Y%m%d")
filename1 = @filename + ".#{yyyymmdd}"
filename2 = @filename + ".#{yyyymmdd}.1"
filename3 = @filename + ".#{yyyymmdd}.2"
begin
logger = Logger.new(@filename, 'now')
assert_file.exist?(@filename)
assert_file.not_exist?(filename1)
assert_file.not_exist?(filename2)
assert_file.not_exist?(filename3)
logger.info("0" * 15)
assert_file.exist?(@filename)
assert_file.exist?(filename1)
assert_file.not_exist?(filename2)
assert_file.not_exist?(filename3)
logger.warn("0" * 15)
assert_file.exist?(@filename)
assert_file.exist?(filename1)
assert_file.exist?(filename2)
assert_file.not_exist?(filename3)
logger.error("0" * 15)
assert_file.exist?(@filename)
assert_file.exist?(filename1)
assert_file.exist?(filename2)
assert_file.exist?(filename3)
ensure
logger.close if logger
[filename1, filename2, filename3].each do |filename|
File.unlink(filename) if File.exist?(filename)
end
end
end
def test_shifting_period_suffix
# shift_age other than 'daily', 'weekly', and 'monthly' means 'everytime'
['%Y%m%d', '%Y-%m-%d', '%Y'].each do |format|
if format == '%Y%m%d' # default
logger = Logger.new(@filename, 'now', 1048576)
else # config
logger = Logger.new(@filename, 'now', 1048576, shift_period_suffix: format)
end
begin
yyyymmdd = Time.now.strftime(format)
filename1 = @filename + ".#{yyyymmdd}"
filename2 = @filename + ".#{yyyymmdd}.1"
filename3 = @filename + ".#{yyyymmdd}.2"
logger.info("0" * 15)
logger.info("0" * 15)
logger.info("0" * 15)
assert_file.exist?(@filename)
assert_file.exist?(filename1)
assert_file.exist?(filename2)
assert_file.exist?(filename3)
ensure
logger.close if logger
[filename1, filename2, filename3].each do |filename|
File.unlink(filename) if File.exist?(filename)
end
end
end
end
def test_shifting_size_in_multiprocess
tmpfile = Tempfile.new([File.basename(__FILE__, '.*'), '_1.log'])
logfile = tmpfile.path
logfile0 = logfile + '.0'
logfile1 = logfile + '.1'
logfile2 = logfile + '.2'
tmpfile.close(true)
File.unlink(logfile) if File.exist?(logfile)
File.unlink(logfile0) if File.exist?(logfile0)
File.unlink(logfile1) if File.exist?(logfile1)
File.unlink(logfile2) if File.exist?(logfile2)
begin
stderr = run_children(2, [logfile], "#{<<-"begin;"}\n#{<<-'end;'}")
begin;
logger = Logger.new(ARGV[0], 4, 10)
10.times do
logger.info '0' * 15
end
end;
assert_no_match(/log shifting failed/, stderr)
assert_no_match(/log writing failed/, stderr)
assert_no_match(/log rotation inter-process lock failed/, stderr)
ensure
File.unlink(logfile) if File.exist?(logfile)
File.unlink(logfile0) if File.exist?(logfile0)
File.unlink(logfile1) if File.exist?(logfile1)
File.unlink(logfile2) if File.exist?(logfile2)
end
end
def test_shifting_age_in_multiprocess
yyyymmdd = Time.now.strftime("%Y%m%d")
begin
stderr = run_children(2, [@filename], "#{<<-"begin;"}\n#{<<-'end;'}")
begin;
logger = Logger.new(ARGV[0], 'now')
10.times do
logger.info '0' * 15
end
end;
assert_no_match(/log shifting failed/, stderr)
assert_no_match(/log writing failed/, stderr)
assert_no_match(/log rotation inter-process lock failed/, stderr)
ensure
Dir.glob("#{@filename}.#{yyyymmdd}{,.[1-9]*}") do |filename|
File.unlink(filename) if File.exist?(filename)
end
end
end
def test_open_logfile_in_multiprocess
tmpfile = Tempfile.new([File.basename(__FILE__, '.*'), '_1.log'])
logfile = tmpfile.path
tmpfile.close(true)
begin
20.times do
run_children(2, [logfile], "#{<<-"begin;"}\n#{<<-'end;'}")
begin;
logfile = ARGV[0]
logdev = Logger::LogDevice.new(logfile)
logdev.send(:open_logfile, logfile)
end;
assert_equal(1, File.readlines(logfile).grep(/# Logfile created on/).size)
File.unlink(logfile)
end
ensure
File.unlink(logfile) if File.exist?(logfile)
end
end
def test_shifting_size_not_rotate_too_much
logdev0 = d(@filename)
logdev0.__send__(:add_log_header, @tempfile)
header_size = @tempfile.size
message = "*" * 99 + "\n"
shift_size = header_size + message.size * 3 - 1
opt = {shift_age: 1, shift_size: shift_size}
Dir.mktmpdir do |tmpdir|
begin
log = File.join(tmpdir, "log")
logdev1 = d(log, opt)
logdev2 = d(log, opt)
assert_file.identical?(log, logdev1.dev)
assert_file.identical?(log, logdev2.dev)
3.times{logdev1.write(message)}
assert_file.identical?(log, logdev1.dev)
assert_file.identical?(log, logdev2.dev)
logdev1.write(message)
assert_file.identical?(log, logdev1.dev)
assert_file.identical?(log + ".0", logdev2.dev)
logdev2.write(message)
assert_file.identical?(log, logdev1.dev)
assert_file.identical?(log, logdev2.dev)
logdev1.write(message)
assert_file.identical?(log, logdev1.dev)
assert_file.identical?(log, logdev2.dev)
ensure
logdev1.close if logdev1
logdev2.close if logdev2
end
end
ensure
logdev0.close
end unless /mswin|mingw/ =~ RUBY_PLATFORM
def test_shifting_midnight
Dir.mktmpdir do |tmpdir|
assert_in_out_err([*%W"--disable=gems -rlogger -C#{tmpdir} -"], "#{<<-"begin;"}\n#{<<-'end;'}")
begin;
begin
module FakeTime
attr_accessor :now
end
class << Time
prepend FakeTime
end
log = "log"
File.open(log, "w") {}
File.utime(*[Time.mktime(2014, 1, 2, 0, 0, 0)]*2, log)
Time.now = Time.mktime(2014, 1, 2, 23, 59, 59, 999000)
dev = Logger::LogDevice.new(log, shift_age: 'daily')
dev.write("#{Time.now} hello-1\n")
File.utime(Time.now, Time.now, log)
Time.now = Time.mktime(2014, 1, 3, 1, 1, 1)
dev.write("#{Time.now} hello-2\n")
File.utime(Time.now, Time.now, log)
ensure
dev.close
end
end;
bug = '[GH-539]'
log = File.join(tmpdir, "log")
cont = File.read(log)
assert_match(/hello-2/, cont)
assert_not_match(/hello-1/, cont)
assert_file.for(bug).exist?(log+".20140102")
assert_match(/hello-1/, File.read(log+".20140102"), bug)
end
end
env_tz_works = /linux|darwin|freebsd/ =~ RUBY_PLATFORM # borrow from test/ruby/test_time_tz.rb
def test_shifting_weekly
Dir.mktmpdir do |tmpdir|
assert_in_out_err([{"TZ"=>"UTC"}, *%W"-rlogger -C#{tmpdir} -"], "#{<<-"begin;"}\n#{<<-'end;'}")
begin;
begin
module FakeTime
attr_accessor :now
end
class << Time
prepend FakeTime
end
log = "log"
File.open(log, "w") {}
Time.now = Time.utc(2015, 12, 14, 0, 1, 1)
File.utime(Time.now, Time.now, log)
dev = Logger::LogDevice.new("log", shift_age: 'weekly')
Time.now = Time.utc(2015, 12, 19, 12, 34, 56)
dev.write("#{Time.now} hello-1\n")
File.utime(Time.now, Time.now, log)
Time.now = Time.utc(2015, 12, 20, 0, 1, 1)
dev.write("#{Time.now} hello-2\n")
File.utime(Time.now, Time.now, log)
ensure
dev.close if dev
end
end;
log = File.join(tmpdir, "log")
cont = File.read(log)
assert_match(/hello-2/, cont)
assert_not_match(/hello-1/, cont)
log = Dir.glob(log+".*")
assert_equal(1, log.size)
log, = *log
cont = File.read(log)
assert_match(/hello-1/, cont)
assert_equal("2015-12-19", cont[/^[-\d]+/])
assert_equal("20151219", log[/\d+\z/])
end
end if env_tz_works
def test_shifting_monthly
Dir.mktmpdir do |tmpdir|
assert_in_out_err([{"TZ"=>"UTC"}, *%W"-rlogger -C#{tmpdir} -"], "#{<<-"begin;"}\n#{<<-'end;'}")
begin;
begin
module FakeTime
attr_accessor :now
end
class << Time
prepend FakeTime
end
log = "log"
File.open(log, "w") {}
Time.now = Time.utc(2015, 12, 14, 0, 1, 1)
File.utime(Time.now, Time.now, log)
dev = Logger::LogDevice.new("log", shift_age: 'monthly')
Time.now = Time.utc(2015, 12, 31, 12, 34, 56)
dev.write("#{Time.now} hello-1\n")
File.utime(Time.now, Time.now, log)
Time.now = Time.utc(2016, 1, 1, 0, 1, 1)
dev.write("#{Time.now} hello-2\n")
File.utime(Time.now, Time.now, log)
ensure
dev.close if dev
end
end;
log = File.join(tmpdir, "log")
cont = File.read(log)
assert_match(/hello-2/, cont)
assert_not_match(/hello-1/, cont)
log = Dir.glob(log+".*")
assert_equal(1, log.size)
log, = *log
cont = File.read(log)
assert_match(/hello-1/, cont)
assert_equal("2015-12-31", cont[/^[-\d]+/])
assert_equal("20151231", log[/\d+\z/])
end
end if env_tz_works
def test_shifting_dst_change
Dir.mktmpdir do |tmpdir|
assert_in_out_err([{"TZ"=>"Europe/London"}, *%W"--disable=gems -rlogger -C#{tmpdir} -"], "#{<<-"begin;"}\n#{<<-'end;'}")
begin;
begin
module FakeTime
attr_accessor :now
end
class << Time
prepend FakeTime
end
log = "log"
File.open(log, "w") {}
Time.now = Time.mktime(2014, 3, 30, 0, 1, 1)
File.utime(Time.now, Time.now, log)
dev = Logger::LogDevice.new(log, shift_age: 'daily')
dev.write("#{Time.now} hello-1\n")
File.utime(*[Time.mktime(2014, 3, 30, 0, 2, 3)]*2, log)
Time.now = Time.mktime(2014, 3, 31, 0, 1, 1)
dev.write("#{Time.now} hello-2\n")
File.utime(Time.now, Time.now, log)
ensure
dev.close
end
end;
log = File.join(tmpdir, "log")
cont = File.read(log)
assert_match(/hello-2/, cont)
assert_not_match(/hello-1/, cont)
assert_file.exist?(log+".20140330")
end
end if env_tz_works
def test_shifting_weekly_dst_change
Dir.mktmpdir do |tmpdir|
assert_separately([{"TZ"=>"Europe/London"}, *%W"-rlogger -C#{tmpdir} -"], "#{<<-"begin;"}\n#{<<-'end;'}")
begin;
begin
module FakeTime
attr_accessor :now
end
class << Time
prepend FakeTime
end
log = "log"
File.open(log, "w") {}
Time.now = Time.mktime(2015, 10, 25, 0, 1, 1)
File.utime(Time.now, Time.now, log)
dev = Logger::LogDevice.new("log", shift_age: 'weekly')
dev.write("#{Time.now} hello-1\n")
File.utime(Time.now, Time.now, log)
ensure
dev.close if dev
end
end;
log = File.join(tmpdir, "log")
cont = File.read(log)
assert_match(/hello-1/, cont)
end
end if env_tz_works
def test_shifting_monthly_dst_change
Dir.mktmpdir do |tmpdir|
assert_separately([{"TZ"=>"Europe/London"}, *%W"-rlogger -C#{tmpdir} -"], "#{<<-"begin;"}\n#{<<-'end;'}")
begin;
begin
module FakeTime
attr_accessor :now
end
class << Time
prepend FakeTime
end
log = "log"
File.open(log, "w") {}
Time.now = Time.utc(2016, 9, 1, 0, 1, 1)
File.utime(Time.now, Time.now, log)
dev = Logger::LogDevice.new("log", shift_age: 'monthly')
Time.now = Time.utc(2016, 9, 8, 7, 6, 5)
dev.write("#{Time.now} hello-1\n")
File.utime(Time.now, Time.now, log)
Time.now = Time.utc(2016, 10, 9, 8, 7, 6)
dev.write("#{Time.now} hello-2\n")
File.utime(Time.now, Time.now, log)
Time.now = Time.utc(2016, 10, 9, 8, 7, 7)
dev.write("#{Time.now} hello-3\n")
File.utime(Time.now, Time.now, log)
ensure
dev.close if dev
end
end;
log = File.join(tmpdir, "log")
cont = File.read(log)
assert_match(/hello-2/, cont)
assert_not_match(/hello-1/, cont)
log = Dir.glob(log+".*")
assert_equal(1, log.size)
log, = *log
cont = File.read(log)
assert_match(/hello-1/, cont)
assert_equal("2016-09-08", cont[/^[-\d]+/])
assert_equal("20160930", log[/\d+\z/])
end
end if env_tz_works
def test_shifting_midnight_exist_file
Dir.mktmpdir do |tmpdir|
assert_in_out_err([*%W"--disable=gems -rlogger -C#{tmpdir} -"], "#{<<-"begin;"}\n#{<<-'end;'}")
begin;
begin
module FakeTime
attr_accessor :now
end
class << Time
prepend FakeTime
end
log = "log"
File.open(log, "w") {}
File.utime(*[Time.mktime(2014, 1, 2, 0, 0, 0)]*2, log)
Time.now = Time.mktime(2014, 1, 2, 23, 59, 59, 999000)
dev = Logger::LogDevice.new(log, shift_age: 'daily')
dev.write("#{Time.now} hello-1\n")
dev.close
File.utime(Time.now, Time.now, log)
Time.now = Time.mktime(2014, 1, 3, 1, 1, 1)
dev = Logger::LogDevice.new(log, shift_age: 'daily')
dev.write("#{Time.now} hello-2\n")
File.utime(Time.now, Time.now, log)
ensure
dev.close
end
end;
bug = '[GH-539]'
log = File.join(tmpdir, "log")
cont = File.read(log)
assert_match(/hello-2/, cont)
assert_not_match(/hello-1/, cont)
assert_file.for(bug).exist?(log+".20140102")
assert_match(/hello-1/, File.read(log+".20140102"), bug)
end
end
env_tz_works = /linux|darwin|freebsd/ =~ RUBY_PLATFORM # borrow from test/ruby/test_time_tz.rb
def test_shifting_weekly_exist_file
Dir.mktmpdir do |tmpdir|
assert_in_out_err([{"TZ"=>"UTC"}, *%W"-rlogger -C#{tmpdir} -"], "#{<<-"begin;"}\n#{<<-'end;'}")
begin;
begin
module FakeTime
attr_accessor :now
end
class << Time
prepend FakeTime
end
log = "log"
File.open(log, "w") {}
Time.now = Time.utc(2015, 12, 14, 0, 1, 1)
File.utime(Time.now, Time.now, log)
dev = Logger::LogDevice.new("log", shift_age: 'weekly')
Time.now = Time.utc(2015, 12, 19, 12, 34, 56)
dev.write("#{Time.now} hello-1\n")
dev.close
File.utime(Time.now, Time.now, log)
Time.now = Time.utc(2015, 12, 20, 0, 1, 1)
dev = Logger::LogDevice.new("log", shift_age: 'weekly')
dev.write("#{Time.now} hello-2\n")
File.utime(Time.now, Time.now, log)
ensure
dev.close if dev
end
end;
log = File.join(tmpdir, "log")
cont = File.read(log)
assert_match(/hello-2/, cont)
assert_not_match(/hello-1/, cont)
log = Dir.glob(log+".*")
assert_equal(1, log.size)
log, = *log
cont = File.read(log)
assert_match(/hello-1/, cont)
assert_equal("2015-12-19", cont[/^[-\d]+/])
assert_equal("20151219", log[/\d+\z/])
end
end if env_tz_works
def test_shifting_monthly_exist_file
Dir.mktmpdir do |tmpdir|
assert_in_out_err([{"TZ"=>"UTC"}, *%W"-rlogger -C#{tmpdir} -"], "#{<<-"begin;"}\n#{<<-'end;'}")
begin;
begin
module FakeTime
attr_accessor :now
end
class << Time
prepend FakeTime
end
log = "log"
File.open(log, "w") {}
Time.now = Time.utc(2015, 12, 14, 0, 1, 1)
File.utime(Time.now, Time.now, log)
dev = Logger::LogDevice.new("log", shift_age: 'monthly')
Time.now = Time.utc(2015, 12, 31, 12, 34, 56)
dev.write("#{Time.now} hello-1\n")
dev.close
File.utime(Time.now, Time.now, log)
Time.now = Time.utc(2016, 1, 1, 0, 1, 1)
dev = Logger::LogDevice.new("log", shift_age: 'monthly')
dev.write("#{Time.now} hello-2\n")
File.utime(Time.now, Time.now, log)
ensure
dev.close if dev
end
end;
log = File.join(tmpdir, "log")
cont = File.read(log)
assert_match(/hello-2/, cont)
assert_not_match(/hello-1/, cont)
log = Dir.glob(log+".*")
assert_equal(1, log.size)
log, = *log
cont = File.read(log)
assert_match(/hello-1/, cont)
assert_equal("2015-12-31", cont[/^[-\d]+/])
assert_equal("20151231", log[/\d+\z/])
end
end if env_tz_works
private
def run_children(n, args, src)
r, w = IO.pipe
[w, *(1..n).map do
f = IO.popen([EnvUtil.rubybin, *%w[--disable=gems -rlogger -], *args], "w", err: w)
f.puts(src)
f
end].each(&:close)
stderr = r.read
r.close
stderr
end
end