48 lines
1.4 KiB
Ruby
48 lines
1.4 KiB
Ruby
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# frozen_string_literal: true
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require_relative '../lib/packer'
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describe 'Packer', :packer do
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context 'Pack strings' do
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it 'Should pack a single string' do
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expect(Packer.pack_str('A')).to eq([65, 0])
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end
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end
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context 'Pack single byte integers' do
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it 'Should pack positive' do
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expect(Packer.pack_int(1)).to eq([1])
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expect(Packer.pack_int(3)).to eq([3])
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expect(Packer.pack_int(16)).to eq([16])
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expect(Packer.pack_int(63)).to eq([63])
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end
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it 'Should pack negative' do
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expect(Packer.pack_int(-1)).to eq([64])
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expect(Packer.pack_int(-2)).to eq([65])
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end
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it 'Should pack negative match binary' do
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expect(Packer.pack_int(-1).first.to_s(2)).to eq('1000000')
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expect(Packer.pack_int(-2).first.to_s(2)).to eq('1000001')
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expect(Packer.pack_int(-3).first.to_s(2)).to eq('1000010')
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expect(Packer.pack_int(-4).first.to_s(2)).to eq('1000011')
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end
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end
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context 'Pack multi byte integers' do
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it 'Should pack positive' do
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expect(Packer.pack_int(64).map { |e| e.to_s(2).rjust(8, '0') }).to eq(%w[10000000 00000001])
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expect(Packer.pack_int(64)).to eq([128, 1])
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end
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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[11000001 00000001])
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end
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it 'Should pack large numbers' do
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expect(Packer.pack_int(99_999_999_999_999_999)).to eq([191, 131, 255, 147, 246, 194, 215, 232, 88])
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end
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end
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end
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