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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/context'
RSpec.describe Protocol::HPACK::Context do
let(:context) {Protocol::HPACK::Context.new(table_size: 2048)}
it 'should be initialized with empty headers' do
expect(context.table).to be_empty
end
context 'processing' do
[
['no indexing', :no_index],
['never indexed', :never_indexed],
].each do |desc, type|
context "#{desc}" do
it 'should process indexed header with literal value' do
original_table = context.table.dup
emit = context.decode(name: 4, value: '/path', type: type)
expect(emit).to eq [':path', '/path']
expect(context.table).to eq original_table
end
it 'should process literal header with literal value' do
original_table = context.table.dup
emit = context.decode(name: 'x-custom', value: 'random', type: type)
expect(emit).to eq ['x-custom', 'random']
expect(context.table).to eq original_table
end
end
end
context 'incremental indexing' do
it 'should process indexed header with literal value' do
original_table = context.table.dup
emit = context.decode(name: 4, value: '/path', type: :incremental)
expect(emit).to eq [':path', '/path']
expect(context.table - original_table).to eq [[':path', '/path']]
end
it 'should process literal header with literal value' do
original_table = context.table.dup
context.decode(name: 'x-custom', value: 'random', type: :incremental)
expect(context.table - original_table).to eq [['x-custom', 'random']]
end
end
context 'size bounds' do
it 'should drop headers from end of table' do
context.instance_eval do
add_to_table(['test1', '1' * 1024])
add_to_table(['test2', '2' * 500])
end
original_table = context.table.dup
original_size = original_table.join.bytesize + original_table.size * 32
context.decode(
name: 'x-custom',
value: 'a' * (2048 - original_size),
type: :incremental
)
expect(context.table.first[0]).to eq 'x-custom'
expect(context.table.size).to eq original_table.size # number of entries
end
end
it 'should clear table if entry exceeds table size' do
context.instance_eval do
add_to_table(['test1', '1' * 1024])
add_to_table(['test2', '2' * 500])
end
h = {name: 'x-custom', value: 'a', index: 0, type: :incremental}
e = {name: 'large', value: 'a' * 2048, index: 0}
context.decode(h)
context.decode(e.merge(type: :incremental))
expect(context.table).to be_empty
end
it 'should shrink table if set smaller size' do
context.instance_eval do
add_to_table(['test1', '1' * 1024])
add_to_table(['test2', '2' * 500])
end
context.decode(type: :change_table_size, value: 1500)
expect(context.table.size).to be 1
expect(context.table.first[0]).to eq 'test2'
end
end
end
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