package merkle import ( "testing" "github.com/stretchr/testify/require" tmrand "github.com/tendermint/tendermint/libs/rand" . "github.com/tendermint/tendermint/libs/test" "github.com/tendermint/tendermint/crypto/tmhash" ) type testItem []byte func (tI testItem) Hash() []byte { return []byte(tI) } func TestSimpleProof(t *testing.T) { total := 100 items := make([][]byte, total) for i := 0; i < total; i++ { items[i] = testItem(tmrand.Bytes(tmhash.Size)) } rootHash := SimpleHashFromByteSlices(items) rootHash2, proofs := SimpleProofsFromByteSlices(items) require.Equal(t, rootHash, rootHash2, "Unmatched root hashes: %X vs %X", rootHash, rootHash2) // For each item, check the trail. for i, item := range items { proof := proofs[i] // Check total/index require.EqualValues(t, proof.Index, i, "Unmatched indicies: %d vs %d", proof.Index, i) require.EqualValues(t, proof.Total, total, "Unmatched totals: %d vs %d", proof.Total, total) // Verify success err := proof.Verify(rootHash, item) require.NoError(t, err, "Verification failed: %v.", err) // Trail too long should make it fail origAunts := proof.Aunts proof.Aunts = append(proof.Aunts, tmrand.Bytes(32)) err = proof.Verify(rootHash, item) require.Error(t, err, "Expected verification to fail for wrong trail length") proof.Aunts = origAunts // Trail too short should make it fail proof.Aunts = proof.Aunts[0 : len(proof.Aunts)-1] err = proof.Verify(rootHash, item) require.Error(t, err, "Expected verification to fail for wrong trail length") proof.Aunts = origAunts // Mutating the itemHash should make it fail. err = proof.Verify(rootHash, MutateByteSlice(item)) require.Error(t, err, "Expected verification to fail for mutated leaf hash") // Mutating the rootHash should make it fail. err = proof.Verify(MutateByteSlice(rootHash), item) require.Error(t, err, "Expected verification to fail for mutated root hash") } } func TestSimpleHashAlternatives(t *testing.T) { total := 100 items := make([][]byte, total) for i := 0; i < total; i++ { items[i] = testItem(tmrand.Bytes(tmhash.Size)) } rootHash1 := SimpleHashFromByteSlicesIterative(items) rootHash2 := SimpleHashFromByteSlices(items) require.Equal(t, rootHash1, rootHash2, "Unmatched root hashes: %X vs %X", rootHash1, rootHash2) } func BenchmarkSimpleHashAlternatives(b *testing.B) { total := 100 items := make([][]byte, total) for i := 0; i < total; i++ { items[i] = testItem(tmrand.Bytes(tmhash.Size)) } b.ResetTimer() b.Run("recursive", func(b *testing.B) { for i := 0; i < b.N; i++ { _ = SimpleHashFromByteSlices(items) } }) b.Run("iterative", func(b *testing.B) { for i := 0; i < b.N; i++ { _ = SimpleHashFromByteSlicesIterative(items) } }) } func Test_getSplitPoint(t *testing.T) { tests := []struct { length int64 want int }{ {1, 0}, {2, 1}, {3, 2}, {4, 2}, {5, 4}, {10, 8}, {20, 16}, {100, 64}, {255, 128}, {256, 128}, {257, 256}, } for _, tt := range tests { got := getSplitPoint(tt.length) require.EqualValues(t, tt.want, got, "getSplitPoint(%d) = %v, want %v", tt.length, got, tt.want) } }