136 lines
3.9 KiB
Ruby
136 lines
3.9 KiB
Ruby
# frozen_string_literal: true
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require_relative '../lib/packer'
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describe 'Unpacker', :unpacker do
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context 'Unpack strings' do
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it 'Should unpack multiple strings' do
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u = Unpacker.new([0x41, 0x41, 0x00, 0x42, 0x42, 0x00])
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expect(u.get_string).to eq('AA')
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expect(u.get_string).to eq('BB')
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expect(u.get_string).to eq(nil)
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end
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end
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context 'Unpack single byte integers' do
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it 'Should unpack positive integers' do
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u = Unpacker.new([0x01, 0x02])
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expect(u.get_int).to eq(1)
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expect(u.get_int).to eq(2)
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end
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it 'Should unpack negative integers' do
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u = Unpacker.new([0x40, 0x41, 0x42])
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# 0x40 => 1000 0000
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# ^^ ^
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# negative\ /
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# \ /
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# 0
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#
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# There is no -0 so it will be -1
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expect(u.get_int).to eq(-1)
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expect(u.get_int).to eq(-2)
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expect(u.get_int).to eq(-3)
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end
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it 'Should unpack positive and negative integers' do
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u = Unpacker.new([0x01, 0x02, 0x03, 0x40, 0x41, 0x42])
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expect(u.get_int).to eq(1)
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expect(u.get_int).to eq(2)
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expect(u.get_int).to eq(3)
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expect(u.get_int).to eq(-1)
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expect(u.get_int).to eq(-2)
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expect(u.get_int).to eq(-3)
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end
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it 'Should pack and unpack and match from 0 to 63' do
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64.times do |i|
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u = Unpacker.new(Packer.pack_int(i))
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expect(u.get_int).to eq(i)
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end
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end
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# https://github.com/ddnet/ddnet/pull/6015
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it 'Should unpack the same as ddnet C++ tests -3..3' do
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expect(Packer.pack_int(1).first.to_s(2).rjust(8, '0')).to eq('00000001')
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expect(Packer.pack_int(2).first.to_s(2).rjust(8, '0')).to eq('00000010')
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expect(Packer.pack_int(3).first.to_s(2).rjust(8, '0')).to eq('00000011')
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expect(Packer.pack_int(-1).first.to_s(2).rjust(8, '0')).to eq('01000000')
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expect(Packer.pack_int(-2).first.to_s(2).rjust(8, '0')).to eq('01000001')
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expect(Packer.pack_int(-3).first.to_s(2).rjust(8, '0')).to eq('01000010')
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u = Unpacker.new(['00000001'.to_i(2)])
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expect(u.get_int).to eq(1)
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u = Unpacker.new(['00000010'.to_i(2)])
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expect(u.get_int).to eq(2)
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u = Unpacker.new(['00000011'.to_i(2)])
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expect(u.get_int).to eq(3)
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u = Unpacker.new(['01000000'.to_i(2)])
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expect(u.get_int).to eq(-1)
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end
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it 'Should pack and unpack and match from -3 to 3' do
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(-3..3).each do |i|
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u = Unpacker.new(Packer.pack_int(i))
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expect(u.get_int).to eq(i)
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end
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end
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it 'Should pack and unpack and match from -63 to 63' do
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(-63..63).each do |i|
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u = Unpacker.new(Packer.pack_int(i))
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expect(u.get_int).to eq(i)
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end
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end
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it 'Should unpack 0000 0001 to 1' do
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u = Unpacker.new(['00000001'.to_i(2)])
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expect(u.get_int).to eq(1)
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end
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end
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context 'Unpack multi byte integers' do
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it 'Should pack and unpack and match from 0 to 128' do
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129.times do |i|
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u = Unpacker.new(Packer.pack_int(i))
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expect(u.get_int).to eq(i)
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end
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end
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it 'Should unpack 0xFF 0x01 to -128 (match tw traffic)' do
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u = Unpacker.new([0xFF, 0x01])
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expect(u.get_int).to eq(-128)
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end
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it 'Should pack and unpack and match from -128 to 128' do
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(-128..128).each do |i|
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u = Unpacker.new(Packer.pack_int(i))
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expect(u.get_int).to eq(i)
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end
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end
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it 'Should unpack [128, 1] to 64' do
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u = Unpacker.new([128, 1])
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expect(u.get_int).to eq(64)
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end
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it 'Should unpack [128, 1, 128, 1] to [64, 64]' do
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u = Unpacker.new([128, 1, 128, 1])
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expect(u.get_int).to eq(64)
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expect(u.get_int).to eq(64)
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end
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it 'Should unpack 1000 0000 0000 0001 to 64' do
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u = Unpacker.new(['10000000'.to_i(2), '00000001'.to_i(2)])
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expect(u.get_int).to eq(64)
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end
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it 'Should unpack 1100 0000 0000 0001 to -65' do
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u = Unpacker.new(['11000000'.to_i(2), '00000001'.to_i(2)])
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expect(u.get_int).to eq(-65)
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end
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end
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end
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