github.com/aigarnetwork/aigar@v0.0.0-20191115204914-d59a6eb70f8e/common/bitutil/compress_fuzz.go (about)

     1  //  Copyright 2018 The go-ethereum Authors
     2  //  Copyright 2019 The go-aigar Authors
     3  //  This file is part of the go-aigar library.
     4  //
     5  //  The go-aigar library is free software: you can redistribute it and/or modify
     6  //  it under the terms of the GNU Lesser General Public License as published by
     7  //  the Free Software Foundation, either version 3 of the License, or
     8  //  (at your option) any later version.
     9  //
    10  //  The go-aigar library is distributed in the hope that it will be useful,
    11  //  but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    13  //  GNU Lesser General Public License for more details.
    14  //
    15  //  You should have received a copy of the GNU Lesser General Public License
    16  //  along with the go-aigar library. If not, see <http://www.gnu.org/licenses/>.
    17  
    18  // +build gofuzz
    19  
    20  package bitutil
    21  
    22  import "bytes"
    23  
    24  // Fuzz implements a go-fuzz fuzzer method to test various encoding method
    25  // invocations.
    26  func Fuzz(data []byte) int {
    27  	if len(data) == 0 {
    28  		return -1
    29  	}
    30  	if data[0]%2 == 0 {
    31  		return fuzzEncode(data[1:])
    32  	}
    33  	return fuzzDecode(data[1:])
    34  }
    35  
    36  // fuzzEncode implements a go-fuzz fuzzer method to test the bitset encoding and
    37  // decoding algorithm.
    38  func fuzzEncode(data []byte) int {
    39  	proc, _ := bitsetDecodeBytes(bitsetEncodeBytes(data), len(data))
    40  	if !bytes.Equal(data, proc) {
    41  		panic("content mismatch")
    42  	}
    43  	return 0
    44  }
    45  
    46  // fuzzDecode implements a go-fuzz fuzzer method to test the bit decoding and
    47  // reencoding algorithm.
    48  func fuzzDecode(data []byte) int {
    49  	blob, err := bitsetDecodeBytes(data, 1024)
    50  	if err != nil {
    51  		return 0
    52  	}
    53  	if comp := bitsetEncodeBytes(blob); !bytes.Equal(comp, data) {
    54  		panic("content mismatch")
    55  	}
    56  	return 0
    57  }