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83 lines
1.9 KiB
83 lines
1.9 KiB
package merkle
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import (
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. "github.com/tendermint/tendermint/common"
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. "github.com/tendermint/tendermint/common/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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numItems := 100
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items := make([]Hashable, numItems)
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for i := 0; i < numItems; i++ {
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items[i] = testItem(RandBytes(32))
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}
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rootHash := SimpleHashFromHashables(items)
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proofs := SimpleProofsFromHashables(items)
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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(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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proof.Index += 1
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{
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ok = proof.Verify(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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proof.Index -= 1
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// Trail too long should make it fail
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origInnerHashes := proof.InnerHashes
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proof.InnerHashes = append(proof.InnerHashes, RandBytes(32))
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{
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ok = proof.Verify(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.InnerHashes = origInnerHashes
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// Trail too short should make it fail
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proof.InnerHashes = proof.InnerHashes[0 : len(proof.InnerHashes)-1]
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{
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ok = proof.Verify(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.InnerHashes = origInnerHashes
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// Mutating the itemHash should make it fail.
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ok = proof.Verify(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(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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