61 lines
1.9 KiB
Go
61 lines
1.9 KiB
Go
// Copyright 2017 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package bloombits
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import (
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"bytes"
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"math/rand"
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"testing"
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"github.com/ethereum/go-ethereum/core/types"
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)
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// Tests that batched bloom bits are correctly rotated from the input bloom
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// filters.
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func TestGenerator(t *testing.T) {
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// Generate the input and the rotated output
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var input, output [types.BloomBitLength][types.BloomByteLength]byte
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for i := 0; i < types.BloomBitLength; i++ {
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for j := 0; j < types.BloomBitLength; j++ {
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bit := byte(rand.Int() % 2)
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input[i][j/8] |= bit << byte(7-j%8)
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output[types.BloomBitLength-1-j][i/8] |= bit << byte(7-i%8)
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}
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}
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// Crunch the input through the generator and verify the result
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gen, err := NewGenerator(types.BloomBitLength)
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if err != nil {
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t.Fatalf("failed to create bloombit generator: %v", err)
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}
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for i, bloom := range input {
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if err := gen.AddBloom(bloom); err != nil {
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t.Fatalf("bloom %d: failed to add: %v", i, err)
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}
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}
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for i, want := range output {
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have, err := gen.Bitset(uint(i))
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if err != nil {
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t.Fatalf("output %d: failed to retrieve bits: %v", i, err)
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}
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if !bytes.Equal(have, want[:]) {
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t.Errorf("output %d: bit vector mismatch have %x, want %x", i, have, want)
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}
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}
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}
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