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# frozen_string_literal: true
# Copyright, 2018, by Samuel G. D. Williams. <http://www.codeotaku.com>
# Copyrigh, 2013, by Ilya Grigorik.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
require 'protocol/hpack/compressor'
require 'protocol/hpack/decompressor'
require 'json'
RSpec.describe Protocol::HPACK::Compressor do
describe '#write_integer' do
let(:buffer) {String.new.b}
subject {described_class.new(buffer)}
context '0-bit prefix' do
it "can encode the value 10" do
subject.write_integer(10, 0)
expect(buffer).to be == [10].pack('C')
end
it "can encode the value 1337" do
subject.write_integer(1337, 0)
expect(buffer).to be == [128 + 57, 10].pack('C*')
end
end
context '5-bit prefix' do
it "can encode the value 10" do
subject.write_integer(10, 5)
expect(buffer).to be == [10].pack('C')
end
it "can encode the value 1337" do
subject.write_integer(1337, 5)
expect(buffer).to be == [31, 128 + 26, 10].pack('C*')
end
end
end
describe '#write_string' do
[
['with huffman', :always, 0x80],
['without huffman', :never, 0],
].each do |description, huffman, msb|
context description do
let(:context) {Protocol::HPACK::Context.new(huffman: huffman)}
let(:buffer) {String.new.b}
subject {Protocol::HPACK::Compressor.new(buffer, context)}
let(:decompressor) {Protocol::HPACK::Decompressor.new(buffer, context)}
[
['ascii codepoints', 'abcdefghij'],
['utf-8 codepoints', 'éáűőúöüó€'],
['long utf-8 strings', 'éáűőúöüó€' * 100],
].each do |datatype, plain|
it "should handle #{datatype} #{description}" do
subject.write_string(plain)
expect(buffer.getbyte(0) & 0x80).to eq msb
expect(decompressor.read_string).to eq plain
end
end
end
end
context 'choosing shorter representation' do
let(:context) {Protocol::HPACK::Context.new(huffman: :shorter)}
let(:buffer) {String.new.b}
subject {Protocol::HPACK::Compressor.new(buffer, context)}
[
['日本語', :plain],
['200', :huffman],
['xq', :plain], # prefer plain if equal size
].each do |string, choice|
it "should return #{choice} representation" do
subject.write_string(string)
expect(buffer.getbyte(0) & 0x80).to eq(choice == :plain ? 0 : 0x80)
end
end
end
end
describe '#encode' do
let(:path) {File.expand_path("sequence1.json", __dir__)}
let(:sequence) {JSON.parse(File.read(path))}
let(:encoder) {Protocol::HPACK::Context.new}
let(:decoder) {Protocol::HPACK::Context.new}
it "can encode with small table size" do
sequence.each do |headers|
data = Protocol::HPACK::Compressor.new(String.new.b, encoder, table_size_limit: 512).encode(headers)
expect(Protocol::HPACK::Decompressor.new(data, decoder).decode).to be == headers
expect(encoder.table).to be == decoder.table
end
expect(decoder.table_size).to be == 512
end
it "can encode with default table size" do
sequence.each do |headers|
data = Protocol::HPACK::Compressor.new(String.new.b, encoder).encode(headers)
expect(Protocol::HPACK::Decompressor.new(data, decoder).decode).to be == headers
expect(encoder.table).to be == decoder.table
end
end
it "can encode with large table size" do
sequence.each do |headers|
data = Protocol::HPACK::Compressor.new(String.new.b, encoder, table_size_limit: 65536).encode(headers)
expect(Protocol::HPACK::Decompressor.new(data, decoder).decode).to be == headers
expect(encoder.table).to be == decoder.table
end
expect(decoder.table_size).to be == 65536
end
it "can encode with random table sizes" do
sequence.each do |headers|
table_size = rand(128..65536)
data = Protocol::HPACK::Compressor.new(String.new.b, encoder, table_size_limit: table_size).encode(headers)
expect(Protocol::HPACK::Decompressor.new(data, decoder).decode).to be == headers
expect(encoder.table).to be == decoder.table
end
end
end
end
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