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require 'zlib'
require_relative '../../../spec_helper'
describe "Zlib::Deflate.deflate" do
it "deflates some data" do
data = Array.new(10,0).pack('C*')
zipped = Zlib::Deflate.deflate data
zipped.should == [120, 156, 99, 96, 128, 1, 0, 0, 10, 0, 1].pack('C*')
end
it "deflates lots of data" do
data = "\000" * 32 * 1024
zipped = Zlib::Deflate.deflate data
zipped.should == ([120, 156, 237, 193, 1, 1, 0, 0] +
[0, 128, 144, 254, 175, 238, 8, 10] +
Array.new(31, 0) +
[24, 128, 0, 0, 1]).pack('C*')
end
it "deflates chunked data" do
random_generator = Random.new(0)
deflated = ''
Zlib.deflate(random_generator.bytes(20000)) do |chunk|
deflated << chunk
end
deflated.length.should == 20016
end
end
describe "Zlib::Deflate#deflate" do
before :each do
@deflator = Zlib::Deflate.new
end
it "deflates some data" do
data = "\000" * 10
zipped = @deflator.deflate data, Zlib::FINISH
@deflator.finish
zipped.should == [120, 156, 99, 96, 128, 1, 0, 0, 10, 0, 1].pack('C*')
end
it "deflates lots of data" do
data = "\000" * 32 * 1024
zipped = @deflator.deflate data, Zlib::FINISH
@deflator.finish
zipped.should == ([120, 156, 237, 193, 1, 1, 0, 0] +
[0, 128, 144, 254, 175, 238, 8, 10] +
Array.new(31, 0) +
[24, 128, 0, 0, 1]).pack('C*')
end
end
describe "Zlib::Deflate#deflate" do
before :each do
@deflator = Zlib::Deflate.new
@random_generator = Random.new(0)
@original = ''
@chunks = []
end
describe "without break" do
before do
2.times do
@input = @random_generator.bytes(20000)
@original << @input
@deflator.deflate(@input) do |chunk|
@chunks << chunk
end
end
end
it "deflates chunked data" do
@deflator.finish
@chunks.map { |chunk| chunk.length }.should == [16384, 16384]
end
it "deflates chunked data with final chunk" do
final = @deflator.finish
final.length.should == 7253
end
it "deflates chunked data without errors" do
final = @deflator.finish
@chunks << final
@original.should == Zlib.inflate(@chunks.join)
end
end
describe "with break" do
before :each do
@input = @random_generator.bytes(20000)
@deflator.deflate(@input) do |chunk|
@chunks << chunk
break
end
end
it "deflates only first chunk" do
@deflator.finish
@chunks.map { |chunk| chunk.length }.should == [16384]
end
it "deflates chunked data with final chunk" do
final = @deflator.finish
final.length.should == 3632
end
it "deflates chunked data without errors" do
final = @deflator.finish
@chunks << final
@input.should == Zlib.inflate(@chunks.join)
end
end
end
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