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package types
import (
"bytes"
"testing"
"github.com/stretchr/testify/assert"
cmn "github.com/tendermint/tendermint/libs/common"
ctest "github.com/tendermint/tendermint/libs/test"
)
func makeTxs(cnt, size int) Txs {
txs := make(Txs, cnt)
for i := 0; i < cnt; i++ {
txs[i] = cmn.RandBytes(size)
}
return txs
}
func randInt(low, high int) int {
off := cmn.RandInt() % (high - low)
return low + off
}
func TestTxIndex(t *testing.T) {
for i := 0; i < 20; i++ {
txs := makeTxs(15, 60)
for j := 0; j < len(txs); j++ {
tx := txs[j]
idx := txs.Index(tx)
assert.Equal(t, j, idx)
}
assert.Equal(t, -1, txs.Index(nil))
assert.Equal(t, -1, txs.Index(Tx("foodnwkf")))
}
}
func TestTxIndexByHash(t *testing.T) {
for i := 0; i < 20; i++ {
txs := makeTxs(15, 60)
for j := 0; j < len(txs); j++ {
tx := txs[j]
idx := txs.IndexByHash(tx.Hash())
assert.Equal(t, j, idx)
}
assert.Equal(t, -1, txs.IndexByHash(nil))
assert.Equal(t, -1, txs.IndexByHash(Tx("foodnwkf").Hash()))
}
}
func TestValidTxProof(t *testing.T) {
cases := []struct {
txs Txs
}{
{Txs{{1, 4, 34, 87, 163, 1}}},
{Txs{{5, 56, 165, 2}, {4, 77}}},
{Txs{Tx("foo"), Tx("bar"), Tx("baz")}},
{makeTxs(20, 5)},
{makeTxs(7, 81)},
{makeTxs(61, 15)},
}
for h, tc := range cases {
txs := tc.txs
root := txs.Hash()
// make sure valid proof for every tx
for i := range txs {
leaf := txs[i]
leafHash := leaf.Hash()
proof := txs.Proof(i)
assert.Equal(t, i, proof.Index, "%d: %d", h, i)
assert.Equal(t, len(txs), proof.Total, "%d: %d", h, i)
assert.EqualValues(t, root, proof.RootHash, "%d: %d", h, i)
assert.EqualValues(t, leaf, proof.Data, "%d: %d", h, i)
assert.EqualValues(t, leafHash, proof.LeafHash(), "%d: %d", h, i)
assert.Nil(t, proof.Validate(root), "%d: %d", h, i)
assert.NotNil(t, proof.Validate([]byte("foobar")), "%d: %d", h, i)
// read-write must also work
var p2 TxProof
bin, err := cdc.MarshalBinary(proof)
assert.Nil(t, err)
err = cdc.UnmarshalBinary(bin, &p2)
if assert.Nil(t, err, "%d: %d: %+v", h, i, err) {
assert.Nil(t, p2.Validate(root), "%d: %d", h, i)
}
}
}
}
func TestTxProofUnchangable(t *testing.T) {
// run the other test a bunch...
for i := 0; i < 40; i++ {
testTxProofUnchangable(t)
}
}
func testTxProofUnchangable(t *testing.T) {
// make some proof
txs := makeTxs(randInt(2, 100), randInt(16, 128))
root := txs.Hash()
i := randInt(0, len(txs)-1)
proof := txs.Proof(i)
// make sure it is valid to start with
assert.Nil(t, proof.Validate(root))
bin, err := cdc.MarshalBinary(proof)
assert.Nil(t, err)
// try mutating the data and make sure nothing breaks
for j := 0; j < 500; j++ {
bad := ctest.MutateByteSlice(bin)
if !bytes.Equal(bad, bin) {
assertBadProof(t, root, bad, proof)
}
}
}
// This makes sure that the proof doesn't deserialize into something valid.
func assertBadProof(t *testing.T, root []byte, bad []byte, good TxProof) {
var proof TxProof
err := cdc.UnmarshalBinary(bad, &proof)
if err == nil {
err = proof.Validate(root)
if err == nil {
// XXX Fix simple merkle proofs so the following is *not* OK.
// This can happen if we have a slightly different total (where the
// path ends up the same). If it is something else, we have a real
// problem.
assert.NotEqual(t, proof.Total, good.Total, "bad: %#v\ngood: %#v", proof, good)
}
}
}