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txscript/hashcache_test: fix flake due to resetting RNG #1689

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merged 2 commits into from
Feb 4, 2021
Merged

txscript/hashcache_test: fix flake due to resetting RNG #1689

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1dd6934
txscript/hashcache_test: always add inputs during getTxn
cfromknecht Feb 2, 2021
5300a19
txscript/hashcache_test: call rand.Seed once in init
cfromknecht Feb 2, 2021
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14 changes: 6 additions & 8 deletions txscript/hashcache_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -13,12 +13,16 @@ import (
"github.com/davecgh/go-spew/spew"
)

func init() {
rand.Seed(time.Now().Unix())
}

// genTestTx creates a random transaction for uses within test cases.
func genTestTx() (*wire.MsgTx, error) {
tx := wire.NewMsgTx(2)
tx.Version = rand.Int31()

numTxins := rand.Intn(11)
numTxins := 1 + rand.Intn(11)
for i := 0; i < numTxins; i++ {
randTxIn := wire.TxIn{
PreviousOutPoint: wire.OutPoint{
Expand All @@ -34,7 +38,7 @@ func genTestTx() (*wire.MsgTx, error) {
tx.TxIn = append(tx.TxIn, &randTxIn)
}

numTxouts := rand.Intn(11)
numTxouts := 1 + rand.Intn(11)
for i := 0; i < numTxouts; i++ {
randTxOut := wire.TxOut{
Value: rand.Int63(),
Expand All @@ -56,8 +60,6 @@ func genTestTx() (*wire.MsgTx, error) {
func TestHashCacheAddContainsHashes(t *testing.T) {
t.Parallel()

rand.Seed(time.Now().Unix())

cache := NewHashCache(10)

var err error
Expand Down Expand Up @@ -109,8 +111,6 @@ func TestHashCacheAddContainsHashes(t *testing.T) {
func TestHashCacheAddGet(t *testing.T) {
t.Parallel()

rand.Seed(time.Now().Unix())

cache := NewHashCache(10)

// To start, we'll generate a random transaction and compute the set of
Expand Down Expand Up @@ -144,8 +144,6 @@ func TestHashCacheAddGet(t *testing.T) {
func TestHashCachePurge(t *testing.T) {
t.Parallel()

rand.Seed(time.Now().Unix())

cache := NewHashCache(10)

var err error
Expand Down