teeworlds_network/spec/04_packer_spec.rb

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# frozen_string_literal: true
require_relative '../lib/packer'
describe 'Packer', :packer do
context 'Pack strings' do
it 'Should pack a single string' do
expect(Packer.pack_str('A')).to eq([65, 0])
end
end
context 'Pack single byte integers' do
it 'Should pack positive' do
expect(Packer.pack_int(1)).to eq([1])
expect(Packer.pack_int(3)).to eq([3])
expect(Packer.pack_int(16)).to eq([16])
expect(Packer.pack_int(63)).to eq([63])
end
it 'Should pack negative' do
expect(Packer.pack_int(-1)).to eq([64])
expect(Packer.pack_int(-2)).to eq([65])
end
it 'Should pack negative match binary' do
expect(Packer.pack_int(-1).first.to_s(2).rjust(8, '0')).to eq('01000000')
expect(Packer.pack_int(-2).first.to_s(2).rjust(8, '0')).to eq('01000001')
expect(Packer.pack_int(-3).first.to_s(2).rjust(8, '0')).to eq('01000010')
expect(Packer.pack_int(-4).first.to_s(2).rjust(8, '0')).to eq('01000011')
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end
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# https://github.com/ddnet/ddnet/pull/6015
it 'Should pack the same as ddnet C++ tests -3..3' do
expect(Packer.pack_int(1).first.to_s(2).rjust(8, '0')).to eq('00000001')
expect(Packer.pack_int(2).first.to_s(2).rjust(8, '0')).to eq('00000010')
expect(Packer.pack_int(3).first.to_s(2).rjust(8, '0')).to eq('00000011')
expect(Packer.pack_int(-1).first.to_s(2).rjust(8, '0')).to eq('01000000')
expect(Packer.pack_int(-2).first.to_s(2).rjust(8, '0')).to eq('01000001')
expect(Packer.pack_int(-3).first.to_s(2).rjust(8, '0')).to eq('01000010')
end
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end
context 'Pack multi byte integers' do
it 'Should pack positive' do
expect(Packer.pack_int(64).map { |e| e.to_s(2).rjust(8, '0') }).to eq(%w[10000000 00000001])
expect(Packer.pack_int(64)).to eq([128, 1])
end
it 'Should pack negative' do
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expect(Packer.pack_int(-65).map { |e| e.to_s(2).rjust(8, '0') }).to eq(%w[11000000 00000001])
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end
it 'Should pack large numbers' do
expect(Packer.pack_int(99_999_999_999_999_999)).to eq([191, 131, 255, 147, 246, 194, 215, 232, 88])
end
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it 'Should pack -128 to 1111 1111 0000 0001 (match tw traffic)' do
expect(Packer.pack_int(-128).map { |b| b.to_s(2).rjust(8, '0') }).to eq(%w[11111111 00000001])
end
it 'Should pack -128 to 0xFF 0x01 (match tw traffic)' do
expect(Packer.pack_int(-128)).to eq([0xFF, 0x01])
end
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end
end