Merge branch 'shiva/pos-730' of github.com:maticnetwork/bor into arpit/pos-655

consensus/bor/snapshot_test.go

@@ -1,10 +1,10 @@
 package bor
 
 import (
-	"math/rand"
+	"crypto/rand"
+	"math/big"
 	"sort"
 	"testing"
-	"time"
 
 	"github.com/stretchr/testify/require"
 	"pgregory.net/rapid"
@@ -28,8 +28,8 @@ func TestGetSignerSuccessionNumber_ProposerIsSigner(t *testing.T) {
 	}
 
 	// proposer is signer
-	signer := validatorSet.Proposer.Address
-	successionNumber, err := snap.GetSignerSuccessionNumber(signer)
+	signerTest := validatorSet.Proposer.Address
+	successionNumber, err := snap.GetSignerSuccessionNumber(signerTest)
 	if err != nil {
 		t.Fatalf("%s", err)
 	}
@@ -54,8 +54,8 @@ func TestGetSignerSuccessionNumber_SignerIndexIsLarger(t *testing.T) {
 	}
 
 	// choose a signer at an index greater than proposer index
-	signer := snap.ValidatorSet.Validators[signerIndex].Address
-	successionNumber, err := snap.GetSignerSuccessionNumber(signer)
+	signerTest := snap.ValidatorSet.Validators[signerIndex].Address
+	successionNumber, err := snap.GetSignerSuccessionNumber(signerTest)
 	if err != nil {
 		t.Fatalf("%s", err)
 	}
@@ -76,8 +76,8 @@ func TestGetSignerSuccessionNumber_SignerIndexIsSmaller(t *testing.T) {
 	}
 
 	// choose a signer at an index greater than proposer index
-	signer := snap.ValidatorSet.Validators[signerIndex].Address
-	successionNumber, err := snap.GetSignerSuccessionNumber(signer)
+	signerTest := snap.ValidatorSet.Validators[signerIndex].Address
+	successionNumber, err := snap.GetSignerSuccessionNumber(signerTest)
 	if err != nil {
 		t.Fatalf("%s", err)
 	}
@@ -95,13 +95,13 @@ func TestGetSignerSuccessionNumber_ProposerNotFound(t *testing.T) {
 
 	require.Len(t, snap.ValidatorSet.Validators, numVals)
 
-	dummyProposerAddress := randomAddress()
+	dummyProposerAddress := randomAddress(toAddresses(validators)...)
 	snap.ValidatorSet.Proposer = &valset.Validator{Address: dummyProposerAddress}
 
 	// choose any signer
-	signer := snap.ValidatorSet.Validators[3].Address
+	signerTest := snap.ValidatorSet.Validators[3].Address
 
-	_, err := snap.GetSignerSuccessionNumber(signer)
+	_, err := snap.GetSignerSuccessionNumber(signerTest)
 	require.NotNil(t, err)
 
 	e, ok := err.(*UnauthorizedProposerError)
@@ -116,26 +116,30 @@ func TestGetSignerSuccessionNumber_SignerNotFound(t *testing.T) {
 	snap := Snapshot{
 		ValidatorSet: valset.NewValidatorSet(validators),
 	}
-	dummySignerAddress := randomAddress()
+
+	dummySignerAddress := randomAddress(toAddresses(validators)...)
 	_, err := snap.GetSignerSuccessionNumber(dummySignerAddress)
 	require.NotNil(t, err)
+
 	e, ok := err.(*UnauthorizedSignerError)
 	require.True(t, ok)
+
 	require.Equal(t, dummySignerAddress.Bytes(), e.Signer)
 }
 
 // nolint: unparam
 func buildRandomValidatorSet(numVals int) []*valset.Validator {
-	rand.Seed(time.Now().Unix())
-
 	validators := make([]*valset.Validator, numVals)
 	valAddrs := randomAddresses(numVals)
 
 	for i := 0; i < numVals; i++ {
+		power, _ := rand.Int(nil, big.NewInt(99))
+		powerN := power.Int64() + 1
+
 		validators[i] = &valset.Validator{
 			Address: valAddrs[i],
 			// cannot process validators with voting power 0, hence +1
-			VotingPower: int64(rand.Intn(99) + 1),
+			VotingPower: powerN,
 		}
 	}
 
@@ -145,11 +149,27 @@ func buildRandomValidatorSet(numVals int) []*valset.Validator {
 	return validators
 }
 
-func randomAddress() common.Address {
-	bytes := make([]byte, 32)
-	rand.Read(bytes)
+func randomAddress(exclude ...common.Address) common.Address {
+	excl := make(map[common.Address]struct{}, len(exclude))
 
-	return common.BytesToAddress(bytes)
+	for _, addr := range exclude {
+		excl[addr] = struct{}{}
+	}
+
+	bytes := make([]byte, 32)
+
+	var addr common.Address
+
+	for {
+		_, _ = rand.Read(bytes)
+		addr = common.BytesToAddress(bytes)
+
+		if _, ok := excl[addr]; ok {
+			continue
+		}
+
+		return addr
+	}
 }
 
 func randomAddresses(n int) []common.Address {
@@ -168,7 +188,7 @@ func randomAddresses(n int) []common.Address {
 	bytes := make([]byte, 32)
 
 	for {
-		rand.Read(bytes)
+		_, _ = rand.Read(bytes)
 
 		addr = common.BytesToAddress(bytes)
 
@@ -189,7 +209,7 @@ func TestRandomAddresses(t *testing.T) {
 	t.Parallel()
 
 	rapid.Check(t, func(t *rapid.T) {
-		length := rapid.IntMax(100).Draw(t, "length").(int)
+		length := rapid.IntMax(300).Draw(t, "length").(int)
 
 		addrs := randomAddresses(length)
 		addressSet := unique.New(addrs)
@@ -199,3 +219,13 @@ func TestRandomAddresses(t *testing.T) {
 		}
 	})
 }
+
+func toAddresses(vals []*valset.Validator) []common.Address {
+	addrs := make([]common.Address, len(vals))
+
+	for i, val := range vals {
+		addrs[i] = val.Address
+	}
+
+	return addrs
+}