github.com/Oyster-zx/tendermint@v0.34.24-fork/crypto/merkle/tree_test.go (about)

     1  package merkle
     2  
     3  import (
     4  	"encoding/hex"
     5  	"testing"
     6  
     7  	"github.com/stretchr/testify/assert"
     8  	"github.com/stretchr/testify/require"
     9  
    10  	tmrand "github.com/tendermint/tendermint/libs/rand"
    11  	. "github.com/tendermint/tendermint/libs/test"
    12  
    13  	"github.com/tendermint/tendermint/crypto/tmhash"
    14  )
    15  
    16  type testItem []byte
    17  
    18  func (tI testItem) Hash() []byte {
    19  	return []byte(tI)
    20  }
    21  
    22  func TestHashFromByteSlices(t *testing.T) {
    23  	testcases := map[string]struct {
    24  		slices     [][]byte
    25  		expectHash string // in hex format
    26  	}{
    27  		"nil":          {nil, "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"},
    28  		"empty":        {[][]byte{}, "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"},
    29  		"single":       {[][]byte{{1, 2, 3}}, "054edec1d0211f624fed0cbca9d4f9400b0e491c43742af2c5b0abebf0c990d8"},
    30  		"single blank": {[][]byte{{}}, "6e340b9cffb37a989ca544e6bb780a2c78901d3fb33738768511a30617afa01d"},
    31  		"two":          {[][]byte{{1, 2, 3}, {4, 5, 6}}, "82e6cfce00453804379b53962939eaa7906b39904be0813fcadd31b100773c4b"},
    32  		"many": {
    33  			[][]byte{{1, 2}, {3, 4}, {5, 6}, {7, 8}, {9, 10}},
    34  			"f326493eceab4f2d9ffbc78c59432a0a005d6ea98392045c74df5d14a113be18",
    35  		},
    36  	}
    37  	for name, tc := range testcases {
    38  		tc := tc
    39  		t.Run(name, func(t *testing.T) {
    40  			hash := HashFromByteSlices(tc.slices)
    41  			assert.Equal(t, tc.expectHash, hex.EncodeToString(hash))
    42  		})
    43  	}
    44  }
    45  
    46  func TestProof(t *testing.T) {
    47  
    48  	// Try an empty proof first
    49  	rootHash, proofs := ProofsFromByteSlices([][]byte{})
    50  	require.Equal(t, "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", hex.EncodeToString(rootHash))
    51  	require.Empty(t, proofs)
    52  
    53  	total := 100
    54  
    55  	items := make([][]byte, total)
    56  	for i := 0; i < total; i++ {
    57  		items[i] = testItem(tmrand.Bytes(tmhash.Size))
    58  	}
    59  
    60  	rootHash = HashFromByteSlices(items)
    61  
    62  	rootHash2, proofs := ProofsFromByteSlices(items)
    63  
    64  	require.Equal(t, rootHash, rootHash2, "Unmatched root hashes: %X vs %X", rootHash, rootHash2)
    65  
    66  	// For each item, check the trail.
    67  	for i, item := range items {
    68  		proof := proofs[i]
    69  
    70  		// Check total/index
    71  		require.EqualValues(t, proof.Index, i, "Unmatched indicies: %d vs %d", proof.Index, i)
    72  
    73  		require.EqualValues(t, proof.Total, total, "Unmatched totals: %d vs %d", proof.Total, total)
    74  
    75  		// Verify success
    76  		err := proof.Verify(rootHash, item)
    77  		require.NoError(t, err, "Verification failed: %v.", err)
    78  
    79  		// Trail too long should make it fail
    80  		origAunts := proof.Aunts
    81  		proof.Aunts = append(proof.Aunts, tmrand.Bytes(32))
    82  		err = proof.Verify(rootHash, item)
    83  		require.Error(t, err, "Expected verification to fail for wrong trail length")
    84  
    85  		proof.Aunts = origAunts
    86  
    87  		// Trail too short should make it fail
    88  		proof.Aunts = proof.Aunts[0 : len(proof.Aunts)-1]
    89  		err = proof.Verify(rootHash, item)
    90  		require.Error(t, err, "Expected verification to fail for wrong trail length")
    91  
    92  		proof.Aunts = origAunts
    93  
    94  		// Mutating the itemHash should make it fail.
    95  		err = proof.Verify(rootHash, MutateByteSlice(item))
    96  		require.Error(t, err, "Expected verification to fail for mutated leaf hash")
    97  
    98  		// Mutating the rootHash should make it fail.
    99  		err = proof.Verify(MutateByteSlice(rootHash), item)
   100  		require.Error(t, err, "Expected verification to fail for mutated root hash")
   101  	}
   102  }
   103  
   104  func TestHashAlternatives(t *testing.T) {
   105  
   106  	total := 100
   107  
   108  	items := make([][]byte, total)
   109  	for i := 0; i < total; i++ {
   110  		items[i] = testItem(tmrand.Bytes(tmhash.Size))
   111  	}
   112  
   113  	rootHash1 := HashFromByteSlicesIterative(items)
   114  	rootHash2 := HashFromByteSlices(items)
   115  	require.Equal(t, rootHash1, rootHash2, "Unmatched root hashes: %X vs %X", rootHash1, rootHash2)
   116  }
   117  
   118  func BenchmarkHashAlternatives(b *testing.B) {
   119  	total := 100
   120  
   121  	items := make([][]byte, total)
   122  	for i := 0; i < total; i++ {
   123  		items[i] = testItem(tmrand.Bytes(tmhash.Size))
   124  	}
   125  
   126  	b.ResetTimer()
   127  	b.Run("recursive", func(b *testing.B) {
   128  		for i := 0; i < b.N; i++ {
   129  			_ = HashFromByteSlices(items)
   130  		}
   131  	})
   132  
   133  	b.Run("iterative", func(b *testing.B) {
   134  		for i := 0; i < b.N; i++ {
   135  			_ = HashFromByteSlicesIterative(items)
   136  		}
   137  	})
   138  }
   139  
   140  func Test_getSplitPoint(t *testing.T) {
   141  	tests := []struct {
   142  		length int64
   143  		want   int64
   144  	}{
   145  		{1, 0},
   146  		{2, 1},
   147  		{3, 2},
   148  		{4, 2},
   149  		{5, 4},
   150  		{10, 8},
   151  		{20, 16},
   152  		{100, 64},
   153  		{255, 128},
   154  		{256, 128},
   155  		{257, 256},
   156  	}
   157  	for _, tt := range tests {
   158  		got := getSplitPoint(tt.length)
   159  		require.EqualValues(t, tt.want, got, "getSplitPoint(%d) = %v, want %v", tt.length, got, tt.want)
   160  	}
   161  }