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require 'test/unit'
require 'zlib'
require 'stringio'
class TestZlib < Test::Unit::TestCase
def teardown; File.unlink @filename if @filename; end
def test_inflate_deflate
s = "test comression string"
[Zlib::NO_COMPRESSION, Zlib::BEST_SPEED, Zlib::BEST_COMPRESSION, Zlib::DEFAULT_COMPRESSION].each do |level|
assert_equal(s, Zlib::Inflate.inflate(Zlib::Deflate.deflate(s, level)))
end
end
# Zlib::Inflate uses org.jruby.util.ZlibInflate for low-level decompression logic, which is built around
# java.util.zip.Inflater.
#
# Inflater, and hence ZlibInflate, can run in one of two basic modes:
#
# - "wrapped" IO stream: when working with an input stream that will contain
# Zlib headers and checksum
# - "unwrapped" IO stream: input streams that do not contain Zlib headers
# and checksum
#
# This tests whether an instance of Zlib::Inflate correctly reports its completion status
# after decompressing the full contents of an unwrapped input stream.
#
def test_inflate_should_be_finished_after_decompressing_full_unwrapped_stream
actual = "test compression string\n" * 5
# This is a base64-encoded representation of a zipped text file.
# This is not the ZIP archive itself; rather, it is the compressed representation
# of a deflated file inside the archive.
data = "K0ktLlFIzs8tKEotLs7Mz1MoLinKzEvnKqGxOABQSwECFwMUAAIACAAxKng3dpOMHR0AAAB4AAAACAANAAAAAAABAAAApIEAAAAAdGVzdC50eHRVVAUAAz76R0dVeAAAUEsFBgAAAAABAAEAQwAAAFgAAAAAAA=="
inflater = Zlib::Inflate.new(-Zlib::MAX_WBITS)
stream = StringIO.new(data.unpack('m*')[0])
assert_equal(actual, inflater.inflate(stream.read(nil, '')), "Unexpected result of decompression.")
assert(inflater.finished?, "Inflater should be finished after inflating all input.")
end
def test_gzip_reader_writer
@filename = "____temp_zlib_file";
Zlib::GzipWriter.open(@filename) { |z| z.puts 'HEH' }
Zlib::GzipReader.open(@filename) do |z|
assert_equal("HEH\n", z.gets)
assert_nil z.getc
assert z.eof?
end
File.unlink(@filename)
Zlib::GzipWriter.open(@filename) { |z| z.write "HEH\n" }
Zlib::GzipReader.open(@filename) do |z|
assert_equal("HEH\n", z.gets)
assert_nil z.getc
assert z.eof?
end
File.unlink(@filename)
z = Zlib::GzipWriter.open(@filename)
z.puts 'HOH'
z.puts 'foo|bar'
z.close
z = Zlib::GzipReader.open(@filename)
assert_equal("HOH\n", z.gets)
assert_equal("foo|", z.gets("|"))
assert_equal("bar\n", z.gets)
z.close
end
def test_native_exception_from_zlib_on_broken_header
corrupt = StringIO.new
corrupt.write('borkborkbork')
begin
Zlib::GzipReader.new(corrupt)
flunk()
rescue Zlib::GzipReader::Error
end
end
def test_deflate_positive_winbits
d = Zlib::Deflate.new(Zlib::DEFAULT_COMPRESSION, Zlib::MAX_WBITS)
d << 'hello'
res = d.finish
assert_equal("x\234\313H\315\311\311\a\000\006,\002\025", res)
end
# negative winbits means no header and no checksum.
def test_deflate_negative_winbits
d = Zlib::Deflate.new(Zlib::DEFAULT_COMPRESSION, -Zlib::MAX_WBITS)
d << 'hello'
res = d.finish
assert_equal("\313H\315\311\311\a\000", res)
end
# JRUBY-2228
def test_gzipreader_descriptor_leak
@filename = "____temp_zlib_file";
Zlib::GzipWriter.open(@filename) { |z| z.puts 'HEH' }
ios = [] # to prevent opened files GC'ed
assert_nothing_raised() {
2048.times {
z = Zlib::GzipReader.open(@filename)
z.close
ios << z
}
}
end
def test_wrap
content = StringIO.new "", "r+"
Zlib::GzipWriter.wrap(content) do |io|
io.write "hello\nworld\n"
end
content = StringIO.new content.string, "rb"
gin = Zlib::GzipReader.new(content)
assert_equal("hello\n", gin.gets)
assert_equal("world\n", gin.gets)
assert_nil gin.gets
assert gin.eof?
gin.close
end
def test_each_line_no_block
@filename = "____temp_zlib_file";
Zlib::GzipWriter.open(@filename) { |io| io.write "hello\nworld\n" }
lines = []
z = Zlib::GzipReader.open(@filename)
z.each_line do |line|
lines << line
end
z.close
assert_equal(2, lines.size, lines.inspect)
assert_equal("hello\n", lines.first)
assert_equal("world\n", lines.last)
end
def test_each_line_block
@filename = "____temp_zlib_file";
Zlib::GzipWriter.open(@filename) { |io| io.write "hello\nworld\n" }
lines = []
Zlib::GzipReader.open(@filename) do |z|
z.each_line do |line|
lines << line
end
end
assert_equal(2, lines.size, lines.inspect)
end
def test_empty_line
@filename = "____temp_zlib_file";
Zlib::GzipWriter.open(@filename) { |io| io.write "hello\nworld\n\ngoodbye\n" }
lines = nil
Zlib::GzipReader.open(@filename) do |z|
lines = z.readlines
end
assert_equal(4, lines.size, lines.inspect)
end
def test_inflate_empty_string
assert_raise(Zlib::BufError) { Zlib::Inflate.inflate('') }
end
def test_inflate_bad_data
assert_raise(Zlib::DataError) { Zlib::Inflate.inflate(' ')}
end
def test_inflate_finish
z = Zlib::Inflate.new
z << Zlib::Deflate.deflate('foo')
assert_equal('foo', z.finish)
assert(z.finished?)
assert(!z.closed?)
assert(!z.ended?)
end
def test_inflate_close
z = Zlib::Inflate.new
z << Zlib::Deflate.deflate('foo')
z.close
assert (z.closed?)
assert (z.ended?)
assert_raise(Zlib::Error) { z.finish }
assert_raise(Zlib::Error) { z.finished? }
end
def test_inflate_end
z = Zlib::Inflate.new
z << Zlib::Deflate.deflate('foo')
z.end
assert (z.closed?)
assert (z.ended?)
assert_raise(Zlib::Error) { z.finish }
assert_raise(Zlib::Error) { z.finished? }
end
def test_inflate_incomplete
z = Zlib::Inflate.new
z << Zlib::Deflate.deflate('foo')[0, 1]
assert_raise(Zlib::BufError) { z.finish }
z = Zlib::Inflate.new
z << Zlib::Deflate.deflate('foo')[0, 1]
assert_raise(Zlib::BufError) { z.inflate(nil) }
end
def test_inflate_finished
z = Zlib::Inflate.new
assert(!z.finished?)
z << Zlib::Deflate.deflate('foo')
assert(z.finished?)
# on incomplete data
z = Zlib::Inflate.new
z << Zlib::Deflate.deflate('foo')[0, 1]
assert(!z.finished?)
end
def test_inflate_flush_next_in
z = Zlib::Inflate.new
z << Zlib::Deflate.deflate('foo')
assert_equal("", z.flush_next_in)
assert_equal("foo", z.finish)
assert_equal("", z.flush_next_in)
end
# TODO: JRuby doesn't fully support this
# very low-level Inflate#sync method, so
# we just always return false.
def test_inflate_sync
z = Zlib::Inflate.new
z << Zlib::Deflate.deflate('foo')
assert (!z.sync(''))
assert (!z.sync_point?)
assert_equal("foo", z.finish)
assert (!z.sync(''))
assert (!z.sync_point?)
end
# JRUBY-4502: 1.4 raises native exception at gz.read
def test_corrupted_data
data = '12345abcde'
zip = "\037\213\b\000,\334\321G\000\005\000\235\005\000$\n\000\000"
io = StringIO.new(zip)
# JRuby cannot check corrupted data format at GzipReader.new for now
# because of different input buffer handling.
if defined?(JRUBY_VERSION)
assert_raise(IOError) do
gz = Zlib::GzipReader.new(io) # CRuby raises here
gz.read # JRuby raises here
end
else
assert_raise(Zlib::DataError) do
gz = Zlib::GzipReader.new(io) # CRuby raises here
end
end
end
def test_inflate_after_finish
z = Zlib::Inflate.new
data = "x\234c`\200\001\000\000\n\000\001"
unzipped = z.inflate data
z.finish # this is a precondition
out = z.inflate('uncompressed_data')
out << z.finish
assert_equal('uncompressed_data', out)
z << ('uncompressed_data') << nil
assert_equal('uncompressed_data', z.finish)
end
def test_inflate_pass_through
main_data = "x\234K\313\317\a\000\002\202\001E"
result = ""
z = Zlib::Inflate.new
# add bytes, one by one
(main_data * 2).each_byte { |d| result << z.inflate(d.chr)}
assert_equal("foo", result)
# the first chunk is inflated to its completion,
# the second chunk is just passed through.
result << z.finish
assert_equal("foo" + main_data, result)
end
# JRUBY-4503: cruby-zlib does not require 'close'
def test_gzip_writer_restricted_io
z = Object.new
def z.write(arg)
(@buf ||= []) << arg
end
def z.buf
@buf
end
assert_nil z.buf
Zlib::GzipWriter.wrap(z) { |io| io.write("hello") }
assert_not_nil z.buf
end
# JRUBY-4503: cruby-zlib does not require 'close'
def test_gzip_reader_restricted_io
z = Object.new
def z.read(size)
@buf ||= TestZlib.create_gzip_stream("hello")
@buf.slice!(0, size)
end
called = false
Zlib::GzipReader.wrap(z) { |io|
assert_equal("hello", io.read)
called = true
}
assert(called)
end
# JRUBY-4503: trailer CRC check failed
def test_gzip_reader_trailer_from_buffer
z = Object.new
def z.read(size)
@buf ||= TestZlib.create_gzip_stream("hello")
# emulate sliced buffer reading
@buf.slice!(0, 1)
end
called = false
Zlib::GzipReader.wrap(z) { |io|
assert_equal("hello", io.read)
called = true
}
assert(called)
end
def self.create_gzip_stream(string)
s = StringIO.new
Zlib::GzipWriter.wrap(s) { |io|
io.write("hello")
}
s.string
end
end
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