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tx_test.go
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tx_test.go
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// Copyright (c) 2013-2016 The btcsuite developers
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.
package btcutil_test
import (
"bytes"
"io"
"reflect"
"testing"
"github.com/btcsuite/btcd/chaincfg/chainhash"
"github.com/btcsuite/btcutil"
"github.com/davecgh/go-spew/spew"
)
// TestTx tests the API for Tx.
func TestTx(t *testing.T) {
testTx := Block100000.Transactions[0]
tx := btcutil.NewTx(testTx)
// Ensure we get the same data back out.
if msgTx := tx.MsgTx(); !reflect.DeepEqual(msgTx, testTx) {
t.Errorf("MsgTx: mismatched MsgTx - got %v, want %v",
spew.Sdump(msgTx), spew.Sdump(testTx))
}
// Ensure transaction index set and get work properly.
wantIndex := 0
tx.SetIndex(0)
if gotIndex := tx.Index(); gotIndex != wantIndex {
t.Errorf("Index: mismatched index - got %v, want %v",
gotIndex, wantIndex)
}
// Hash for block 100,000 transaction 0.
wantHashStr := "8c14f0db3df150123e6f3dbbf30f8b955a8249b62ac1d1ff16284aefa3d06d87"
wantHash, err := chainhash.NewHashFromStr(wantHashStr)
if err != nil {
t.Errorf("NewHashFromStr: %v", err)
}
// Request the hash multiple times to test generation and caching.
for i := 0; i < 2; i++ {
hash := tx.Hash()
if !hash.IsEqual(wantHash) {
t.Errorf("Hash #%d mismatched hash - got %v, want %v", i,
hash, wantHash)
}
}
}
// TestNewTxFromBytes tests creation of a Tx from serialized bytes.
func TestNewTxFromBytes(t *testing.T) {
// Serialize the test transaction.
testTx := Block100000.Transactions[0]
var testTxBuf bytes.Buffer
err := testTx.Serialize(&testTxBuf)
if err != nil {
t.Errorf("Serialize: %v", err)
}
testTxBytes := testTxBuf.Bytes()
// Create a new transaction from the serialized bytes.
tx, err := btcutil.NewTxFromBytes(testTxBytes)
if err != nil {
t.Errorf("NewTxFromBytes: %v", err)
return
}
// Ensure the generated MsgTx is correct.
if msgTx := tx.MsgTx(); !reflect.DeepEqual(msgTx, testTx) {
t.Errorf("MsgTx: mismatched MsgTx - got %v, want %v",
spew.Sdump(msgTx), spew.Sdump(testTx))
}
}
// TestTxErrors tests the error paths for the Tx API.
func TestTxErrors(t *testing.T) {
// Serialize the test transaction.
testTx := Block100000.Transactions[0]
var testTxBuf bytes.Buffer
err := testTx.Serialize(&testTxBuf)
if err != nil {
t.Errorf("Serialize: %v", err)
}
testTxBytes := testTxBuf.Bytes()
// Truncate the transaction byte buffer to force errors.
shortBytes := testTxBytes[:4]
_, err = btcutil.NewTxFromBytes(shortBytes)
if err != io.EOF {
t.Errorf("NewTxFromBytes: did not get expected error - "+
"got %v, want %v", err, io.EOF)
}
}
// TestTxHasWitness tests the HasWitness() method.
func TestTxHasWitness(t *testing.T) {
msgTx := Block100000.Transactions[0] // contains witness data
tx := btcutil.NewTx(msgTx)
tx.WitnessHash() // Populate the witness hash cache
tx.HasWitness() // Should not fail (see btcsuite/btcd#1543)
if !tx.HasWitness() {
t.Errorf("HasWitness: got false, want true")
}
for _, msgTxWithoutWitness := range Block100000.Transactions[1:] {
txWithoutWitness := btcutil.NewTx(msgTxWithoutWitness)
if txWithoutWitness.HasWitness() {
t.Errorf("HasWitness: got false, want true")
}
}
}
// TestTxWitnessHash tests the WitnessHash() method.
func TestTxWitnessHash(t *testing.T) {
msgTx := Block100000.Transactions[0] // contains witness data
tx := btcutil.NewTx(msgTx)
if tx.WitnessHash().IsEqual(tx.Hash()) {
t.Errorf("WitnessHash: witness hash and tx id must NOT be same - "+
"got %v, want %v", tx.WitnessHash(), tx.Hash())
}
for _, msgTxWithoutWitness := range Block100000.Transactions[1:] {
txWithoutWitness := btcutil.NewTx(msgTxWithoutWitness)
if !txWithoutWitness.WitnessHash().IsEqual(txWithoutWitness.Hash()) {
t.Errorf("WitnessHash: witness hash and tx id must be same - "+
"got %v, want %v", txWithoutWitness.WitnessHash(), txWithoutWitness.Hash())
}
}
}