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87 lines
1.9 KiB
87 lines
1.9 KiB
package merkle
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import (
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"bytes"
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cmn "github.com/tendermint/tmlibs/common"
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. "github.com/tendermint/tmlibs/test"
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"testing"
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)
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type testItem []byte
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func (tI testItem) Hash() []byte {
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return []byte(tI)
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}
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func TestSimpleProof(t *testing.T) {
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total := 100
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items := make([]Hasher, total)
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for i := 0; i < total; i++ {
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items[i] = testItem(cmn.RandBytes(32))
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}
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rootHash := SimpleHashFromHashers(items)
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rootHash2, proofs := SimpleProofsFromHashers(items)
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if !bytes.Equal(rootHash, rootHash2) {
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t.Errorf("Unmatched root hashes: %X vs %X", rootHash, rootHash2)
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}
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// For each item, check the trail.
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for i, item := range items {
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itemHash := item.Hash()
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proof := proofs[i]
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// Verify success
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ok := proof.Verify(i, total, itemHash, rootHash)
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if !ok {
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t.Errorf("Verification failed for index %v.", i)
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}
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// Wrong item index should make it fail
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{
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ok = proof.Verify((i+1)%total, total, itemHash, rootHash)
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if ok {
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t.Errorf("Expected verification to fail for wrong index %v.", i)
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}
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}
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// Trail too long should make it fail
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origAunts := proof.Aunts
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proof.Aunts = append(proof.Aunts, cmn.RandBytes(32))
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{
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ok = proof.Verify(i, total, itemHash, rootHash)
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if ok {
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t.Errorf("Expected verification to fail for wrong trail length.")
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}
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}
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proof.Aunts = origAunts
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// Trail too short should make it fail
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proof.Aunts = proof.Aunts[0 : len(proof.Aunts)-1]
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{
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ok = proof.Verify(i, total, itemHash, rootHash)
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if ok {
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t.Errorf("Expected verification to fail for wrong trail length.")
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}
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}
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proof.Aunts = origAunts
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// Mutating the itemHash should make it fail.
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ok = proof.Verify(i, total, MutateByteSlice(itemHash), rootHash)
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if ok {
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t.Errorf("Expected verification to fail for mutated leaf hash")
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}
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// Mutating the rootHash should make it fail.
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ok = proof.Verify(i, total, itemHash, MutateByteSlice(rootHash))
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if ok {
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t.Errorf("Expected verification to fail for mutated root hash")
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}
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}
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}
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