test: add evidence e2e tests (#5488)

test/e2e/generator/generate.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"math/rand"
 	"sort"
+	"strconv"
 	"strings"
 
 	e2e "github.com/tendermint/tendermint/test/e2e/pkg"
@@ -39,6 +40,10 @@ var (
 		"kill":       0.1,
 		"restart":    0.1,
 	}
+	nodeMisbehaviors = weightedChoice{
+		misbehaviorOption{"double-prevote"}: 1,
+		misbehaviorOption{}:                 9,
+	}
 )
 
 // Generate generates random testnets using the given RNG.
@@ -91,7 +96,7 @@ func generateTestnet(r *rand.Rand, opt map[string]interface{}) (e2e.Manifest, er
 	nextStartAt := manifest.InitialHeight + 5
 	quorum := numValidators*2/3 + 1
 	for i := 1; i <= numValidators; i++ {
-		startAt := int64(0)
+		startAt := manifest.InitialHeight
 		if i > quorum {
 			startAt = nextStartAt
 			nextStartAt += 5
@@ -174,7 +179,8 @@ func generateTestnet(r *rand.Rand, opt map[string]interface{}) (e2e.Manifest, er
 // generating invalid configurations. We do not set Seeds or PersistentPeers
 // here, since we need to know the overall network topology and startup
 // sequencing.
-func generateNode(r *rand.Rand, mode e2e.Mode, startAt int64, forceArchive bool) *e2e.ManifestNode {
+func generateNode(
+	r *rand.Rand, mode e2e.Mode, startAt int64, forceArchive bool) *e2e.ManifestNode {
 	node := e2e.ManifestNode{
 		Mode:             string(mode),
 		StartAt:          startAt,
@@ -196,6 +202,14 @@ func generateNode(r *rand.Rand, mode e2e.Mode, startAt int64, forceArchive bool)
 		node.SnapshotInterval = 3
 	}
 
+	if node.Mode == "validator" {
+		node.Misbehaviors = nodeMisbehaviors.Choose(r).(misbehaviorOption).
+			atHeight(startAt + 5 + int64(r.Intn(10)))
+		if len(node.Misbehaviors) != 0 {
+			node.PrivvalProtocol = "file"
+		}
+	}
+
 	// If a node which does not persist state also does not retain blocks, randomly
 	// choose to either persist state or retain all blocks.
 	if node.PersistInterval != nil && *node.PersistInterval == 0 && node.RetainBlocks > 0 {
@@ -223,3 +237,16 @@ func generateNode(r *rand.Rand, mode e2e.Mode, startAt int64, forceArchive bool)
 func ptrUint64(i uint64) *uint64 {
 	return &i
 }
+
+type misbehaviorOption struct {
+	misbehavior string
+}
+
+func (m misbehaviorOption) atHeight(height int64) map[string]string {
+	misbehaviorMap := make(map[string]string)
+	if m.misbehavior == "" {
+		return misbehaviorMap
+	}
+	misbehaviorMap[strconv.Itoa(int(height))] = m.misbehavior
+	return misbehaviorMap
+}

test/e2e/generator/main.go

@@ -9,6 +9,7 @@ import (
 	"path/filepath"
 
 	"github.com/spf13/cobra"
+
 	"github.com/tendermint/tendermint/libs/log"
 )
 

test/e2e/generator/random.go

@@ -57,7 +57,7 @@ func (uc uniformChoice) Choose(r *rand.Rand) interface{} {
 }
 
 // weightedChoice chooses a single random key from a map of keys and weights.
-type weightedChoice map[interface{}]uint // nolint:unused
+type weightedChoice map[interface{}]uint
 
 func (wc weightedChoice) Choose(r *rand.Rand) interface{} {
 	total := 0