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# frozen_string_literal: true
require_relative 'test_helper'
# Test zip64 support for real by actually exceeding the 32-bit
# size/offset limits. This test does not, of course, run with the
# normal unit tests! ;)
class Zip64FullTest < Minitest::Test
HUGE_ZIP = 'huge.zip'
def teardown
::Zip.reset!
::FileUtils.rm_f HUGE_ZIP
end
def test_large_zip_file
skip unless ENV['FULL_ZIP64_TEST'] && !Zip::RUNNING_ON_WINDOWS
first_text = 'starting out small'
last_text = 'this tests files starting after 4GB in the archive'
comment_text = 'this is a file comment in a zip64 archive'
::Zip::File.open(HUGE_ZIP, create: true) do |zf|
zf.comment = comment_text
zf.get_output_stream('first_file.txt') do |io|
io.write(first_text)
end
# Write just over 4GB (stored, so the zip file exceeds 4GB).
buf = 'blah' * 16_384
zf.get_output_stream(
'huge_file', compression_method: ::Zip::COMPRESSION_METHOD_STORE
) do |io|
65_537.times { io.write(buf) }
end
zf.get_output_stream('last_file.txt') do |io|
io.write(last_text)
end
end
::Zip::File.open(HUGE_ZIP) do |zf|
assert_equal(
%w[first_file.txt huge_file last_file.txt], zf.entries.map(&:name)
)
assert_equal(first_text, zf.read('first_file.txt'))
assert_equal(last_text, zf.read('last_file.txt'))
assert_equal(comment_text, zf.comment)
end
# NOTE: if this fails, be sure you have UnZip version 6.0 or newer
# as this is the first version to support zip64 extensions
# but some OSes (*cough* OSX) still bundle a 5.xx release
assert(
system("unzip -tqq #{HUGE_ZIP}"),
'third-party zip validation failed'
)
end
end
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