*: fix unused issue

Signed-off-by: Wei Fu <fuweid89@gmail.com>

client/internal/v2/main_test.go

@@ -15,23 +15,11 @@
 package client_test
 
 import (
-	"net/http"
 	"testing"
 
 	"go.etcd.io/etcd/client/pkg/v3/testutil"
 )
 
-func exampleEndpoints() []string        { return nil }
-func exampleTransport() *http.Transport { return nil }
-
-func forUnitTestsRunInMockedContext(mocking func(), example func()) {
-	mocking()
-	// TODO: Call 'example' when mocking() provides realistic mocking of transport.
-
-	// The real testing logic of examples gets executed
-	// as part of ./tests/integration/client/example/...
-}
-
 func TestMain(m *testing.M) {
 	testutil.MustTestMainWithLeakDetection(m)
 }

client/pkg/testutil/assert.go

@@ -15,7 +15,6 @@
 package testutil
 
 import (
-	"reflect"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -52,11 +51,3 @@ func AssertFalse(t *testing.T, v bool, msg ...string) {
 	newMsg := copyToInterface(msg...)
 	assert.Equal(t, false, v, newMsg)
 }
-
-func isNil(v any) bool {
-	if v == nil {
-		return true
-	}
-	rv := reflect.ValueOf(v)
-	return rv.Kind() != reflect.Struct && rv.IsNil()
-}

server/auth/store.go

@@ -37,9 +37,6 @@ import (
 )
 
 var (
-	authEnabled  = []byte{1}
-	authDisabled = []byte{0}
-
 	rootPerm = authpb.Permission{PermType: authpb.READWRITE, Key: []byte{}, RangeEnd: []byte{0}}
 
 	ErrRootUserNotExist     = errors.New("auth: root user does not exist")

server/embed/config.go

@@ -1116,14 +1116,6 @@ func (cfg *Config) getListenClientUrls() (ss []string) {
 	return ss
 }
 
-func (cfg *Config) getListenClientHttpUrls() (ss []string) {
-	ss = make([]string, len(cfg.ListenClientHttpUrls))
-	for i := range cfg.ListenClientHttpUrls {
-		ss[i] = cfg.ListenClientHttpUrls[i].String()
-	}
-	return ss
-}
-
 func (cfg *Config) getMetricsURLs() (ss []string) {
 	ss = make([]string, len(cfg.ListenMetricsUrls))
 	for i := range cfg.ListenMetricsUrls {

server/etcdserver/api/etcdhttp/health_test.go

@@ -34,12 +34,6 @@ import (
 	"go.etcd.io/raft/v3"
 )
 
-type fakeStats struct{}
-
-func (s *fakeStats) SelfStats() []byte   { return nil }
-func (s *fakeStats) LeaderStats() []byte { return nil }
-func (s *fakeStats) StoreStats() []byte  { return nil }
-
 type fakeHealthServer struct {
 	fakeServer
 	health   string

server/etcdserver/version/monitor_test.go

@@ -410,7 +410,6 @@ type storageMock struct {
 	clusterVersion *semver.Version
 	storageVersion *semver.Version
 	downgradeInfo  *DowngradeInfo
-	locked         bool
 }
 
 var _ Server = (*storageMock)(nil)

server/storage/schema/migration.go

@@ -90,13 +90,6 @@ func newMigrationStep(v semver.Version, isUpgrade bool, changes []schemaChange)
 	return step
 }
 
-// execute runs actions required to migrate etcd storage between two minor versions.
-func (s migrationStep) execute(lg *zap.Logger, tx backend.BatchTx) error {
-	tx.LockOutsideApply()
-	defer tx.Unlock()
-	return s.unsafeExecute(lg, tx)
-}
-
 // unsafeExecute is non thread-safe version of execute.
 func (s migrationStep) unsafeExecute(lg *zap.Logger, tx backend.UnsafeReadWriter) error {
 	err := s.actions.unsafeExecute(lg, tx)

tests/e2e/ctl_v3_defrag_test.go

@@ -34,15 +34,6 @@ func maintenanceInitKeys(cx ctlCtx) {
 	}
 }
 
-func ctlV3OnlineDefrag(cx ctlCtx) error {
-	cmdArgs := append(cx.PrefixArgs(), "defrag")
-	lines := make([]expect.ExpectedResponse, cx.epc.Cfg.ClusterSize)
-	for i := range lines {
-		lines[i] = expect.ExpectedResponse{Value: "Finished defragmenting etcd member"}
-	}
-	return e2e.SpawnWithExpects(cmdArgs, cx.envMap, lines...)
-}
-
 func ctlV3OfflineDefrag(cx ctlCtx) error {
 	cmdArgs := append(cx.PrefixArgsUtl(), "defrag", "--data-dir", cx.dataDir)
 	lines := []expect.ExpectedResponse{{Value: "finished defragmenting directory"}}

tests/e2e/ctl_v3_lease_test.go

@@ -96,11 +96,3 @@ func ctlV3LeaseRevoke(cx ctlCtx, leaseID string) error {
 	cmdArgs := append(cx.PrefixArgs(), "lease", "revoke", leaseID)
 	return e2e.SpawnWithExpectWithEnv(cmdArgs, cx.envMap, expect.ExpectedResponse{Value: fmt.Sprintf("lease %s revoked", leaseID)})
 }
-
-func ctlV3LeaseTimeToLive(cx ctlCtx, leaseID string, withKeys bool) error {
-	cmdArgs := append(cx.PrefixArgs(), "lease", "timetolive", leaseID)
-	if withKeys {
-		cmdArgs = append(cmdArgs, "--keys")
-	}
-	return e2e.SpawnWithExpectWithEnv(cmdArgs, cx.envMap, expect.ExpectedResponse{Value: fmt.Sprintf("lease %s granted with", leaseID)})
-}

tests/e2e/ctl_v3_member_test.go

@@ -162,11 +162,6 @@ func memberListWithHexTest(cx ctlCtx) {
 	}
 }
 
-func ctlV3MemberRemove(cx ctlCtx, ep, memberID, clusterID string) error {
-	cmdArgs := append(cx.prefixArgs([]string{ep}), "member", "remove", memberID)
-	return e2e.SpawnWithExpectWithEnv(cmdArgs, cx.envMap, expect.ExpectedResponse{Value: fmt.Sprintf("%s removed from cluster %s", memberID, clusterID)})
-}
-
 func memberAddTest(cx ctlCtx) {
 	peerURL := fmt.Sprintf("http://localhost:%d", e2e.EtcdProcessBasePort+11)
 	if err := ctlV3MemberAdd(cx, peerURL, false); err != nil {

tests/e2e/ctl_v3_test.go

@@ -182,10 +182,6 @@ func withCorruptFunc(f func(string) error) ctlOption {
 	return func(cx *ctlCtx) { cx.corruptFunc = f }
 }
 
-func withDisableStrictReconfig() ctlOption {
-	return func(cx *ctlCtx) { cx.disableStrictReconfigCheck = true }
-}
-
 func withFlagByEnv() ctlOption {
 	return func(cx *ctlCtx) { cx.envMap = make(map[string]string) }
 }
@@ -345,24 +341,3 @@ func (cx *ctlCtx) PrefixArgsUtl() []string {
 func isGRPCTimedout(err error) bool {
 	return strings.Contains(err.Error(), "grpc: timed out trying to connect")
 }
-
-func (cx *ctlCtx) memberToRemove() (ep string, memberID string, clusterID string) {
-	n1 := cx.cfg.ClusterSize
-	if n1 < 2 {
-		cx.t.Fatalf("%d-node is too small to test 'member remove'", n1)
-	}
-
-	resp, err := getMemberList(*cx, false)
-	if err != nil {
-		cx.t.Fatal(err)
-	}
-	if n1 != len(resp.Members) {
-		cx.t.Fatalf("expected %d, got %d", n1, len(resp.Members))
-	}
-
-	ep = resp.Members[0].ClientURLs[0]
-	clusterID = fmt.Sprintf("%x", resp.Header.ClusterId)
-	memberID = fmt.Sprintf("%x", resp.Members[1].ID)
-
-	return ep, memberID, clusterID
-}

tests/e2e/ctl_v3_txn_test.go

@@ -1,90 +0,0 @@
-// Copyright 2016 The etcd Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package e2e
-
-import (
-	"go.etcd.io/etcd/tests/v3/framework/e2e"
-)
-
-type txnRequests struct {
-	compare   []string
-	ifSuccess []string
-	ifFail    []string
-	results   []string
-}
-
-func ctlV3Txn(cx ctlCtx, rqs txnRequests, expectedExitErr bool) error {
-	// TODO: support non-interactive mode
-	cmdArgs := append(cx.PrefixArgs(), "txn")
-	if cx.interactive {
-		cmdArgs = append(cmdArgs, "--interactive")
-	}
-	proc, err := e2e.SpawnCmd(cmdArgs, cx.envMap)
-	if err != nil {
-		return err
-	}
-	_, err = proc.Expect("compares:")
-	if err != nil {
-		return err
-	}
-	for _, req := range rqs.compare {
-		if err = proc.Send(req + "\r"); err != nil {
-			return err
-		}
-	}
-	if err = proc.Send("\r"); err != nil {
-		return err
-	}
-
-	_, err = proc.Expect("success requests (get, put, del):")
-	if err != nil {
-		return err
-	}
-	for _, req := range rqs.ifSuccess {
-		if err = proc.Send(req + "\r"); err != nil {
-			return err
-		}
-	}
-	if err = proc.Send("\r"); err != nil {
-		return err
-	}
-
-	_, err = proc.Expect("failure requests (get, put, del):")
-	if err != nil {
-		return err
-	}
-	for _, req := range rqs.ifFail {
-		if err = proc.Send(req + "\r"); err != nil {
-			return err
-		}
-	}
-	if err = proc.Send("\r"); err != nil {
-		return err
-	}
-
-	for _, line := range rqs.results {
-		_, err = proc.Expect(line)
-		if err != nil {
-			return err
-		}
-	}
-
-	err = proc.Close()
-	if expectedExitErr {
-		return nil
-	}
-
-	return err
-}

tests/robustness/failpoints.go

@@ -175,13 +175,6 @@ func verifyClusterHealth(ctx context.Context, t *testing.T, clus *e2e.EtcdProces
 	return nil
 }
 
-type FailpointConfig struct {
-	failpoint           Failpoint
-	count               int
-	retries             int
-	waitBetweenTriggers time.Duration
-}
-
 type Failpoint interface {
 	Inject(ctx context.Context, t *testing.T, lg *zap.Logger, clus *e2e.EtcdProcessCluster) error
 	Name() string

tools/.golangci.yaml

@@ -22,7 +22,7 @@ linters:
     - revive
     - staticcheck
     - stylecheck
-    # - unused     # TODO: enable by #16610
+    - unused
     # - unconvert  # Remove unnecessary type conversions TODO: enable by #16610
 linters-settings: # please keep this alphabetized
   goimports: