mirror of
https://github.com/rails/rails.git
synced 2022-11-09 12:12:34 -05:00
29c02709cd
A gzip file has a checksum and length for the decompressed data in its footer which isn't checked by just calling Zlib::GzipReader#read. Calling Zlib::GzipReader#close must be called after reading to the end of the file causes this check to be done, which is done by Zlib::GzipReader.wrap after its block is called.
43 lines
2.2 KiB
Ruby
43 lines
2.2 KiB
Ruby
require "abstract_unit"
|
|
require "active_support/core_ext/object/blank"
|
|
|
|
class GzipTest < ActiveSupport::TestCase
|
|
def test_compress_should_decompress_to_the_same_value
|
|
assert_equal "Hello World", ActiveSupport::Gzip.decompress(ActiveSupport::Gzip.compress("Hello World"))
|
|
assert_equal "Hello World", ActiveSupport::Gzip.decompress(ActiveSupport::Gzip.compress("Hello World", Zlib::NO_COMPRESSION))
|
|
assert_equal "Hello World", ActiveSupport::Gzip.decompress(ActiveSupport::Gzip.compress("Hello World", Zlib::BEST_SPEED))
|
|
assert_equal "Hello World", ActiveSupport::Gzip.decompress(ActiveSupport::Gzip.compress("Hello World", Zlib::BEST_COMPRESSION))
|
|
assert_equal "Hello World", ActiveSupport::Gzip.decompress(ActiveSupport::Gzip.compress("Hello World", nil, Zlib::FILTERED))
|
|
assert_equal "Hello World", ActiveSupport::Gzip.decompress(ActiveSupport::Gzip.compress("Hello World", nil, Zlib::HUFFMAN_ONLY))
|
|
assert_equal "Hello World", ActiveSupport::Gzip.decompress(ActiveSupport::Gzip.compress("Hello World", nil, nil))
|
|
end
|
|
|
|
def test_compress_should_return_a_binary_string
|
|
compressed = ActiveSupport::Gzip.compress("")
|
|
|
|
assert_equal Encoding.find("binary"), compressed.encoding
|
|
assert !compressed.blank?, "a compressed blank string should not be blank"
|
|
end
|
|
|
|
def test_compress_should_return_gzipped_string_by_compression_level
|
|
source_string = "Hello World" * 100
|
|
|
|
gzipped_by_speed = ActiveSupport::Gzip.compress(source_string, Zlib::BEST_SPEED)
|
|
assert_equal 1, Zlib::GzipReader.new(StringIO.new(gzipped_by_speed)).level
|
|
|
|
gzipped_by_best_compression = ActiveSupport::Gzip.compress(source_string, Zlib::BEST_COMPRESSION)
|
|
assert_equal 9, Zlib::GzipReader.new(StringIO.new(gzipped_by_best_compression)).level
|
|
|
|
assert_equal true, (gzipped_by_best_compression.bytesize < gzipped_by_speed.bytesize)
|
|
end
|
|
|
|
def test_decompress_checks_crc
|
|
compressed = ActiveSupport::Gzip.compress("Hello World")
|
|
first_crc_byte_index = compressed.bytesize - 8
|
|
compressed.setbyte(first_crc_byte_index, compressed.getbyte(first_crc_byte_index) ^ 0xff)
|
|
|
|
assert_raises(Zlib::GzipFile::CRCError) do
|
|
ActiveSupport::Gzip.decompress(compressed)
|
|
end
|
|
end
|
|
end
|