*: enable more linters

.golangci.yml

@@ -18,6 +18,16 @@ linters:
     - copyloopvar
     - goimports
     - depguard
+    - asasalint
+    - asciicheck
+    - bidichk
+    - durationcheck
+    - gocheckcompilerdirectives
+    - gochecksumtype
+    - makezero
+    - protogetter
+    - reassign
+    - intrange
 linters-settings:
   gocritic:
     # Which checks should be disabled; can't be combined with 'enabled-checks'; default is empty
@@ -36,16 +46,21 @@ linters-settings:
       - G115
   testifylint:
     enable:
+      - blank-import
       - bool-compare
       - compares
       - empty
       - error-is-as
       - error-nil
       - expected-actual
+      - formatter
       - len
+      - negative-positive
       - require-error
       - suite-dont-use-pkg
       - suite-extra-assert-call
+      - suite-subtest-run
+      - useless-assert
     disable:
       - float-compare
       - go-require

client/client.go

@@ -739,7 +739,7 @@ func (c *client) dispatchTSORequestWithRetry(ctx context.Context, dcLocation str
 		err       error
 		req       *tsoRequest
 	)
-	for i := 0; i < dispatchRetryCount; i++ {
+	for i := range dispatchRetryCount {
 		// Do not delay for the first time.
 		if i > 0 {
 			time.Sleep(dispatchRetryDelay)

client/pd_service_discovery.go

@@ -354,7 +354,7 @@ func (c *pdServiceBalancer) set(clients []ServiceClient) {
 func (c *pdServiceBalancer) check() {
 	c.mu.Lock()
 	defer c.mu.Unlock()
-	for i := 0; i < c.totalNode; i++ {
+	for range c.totalNode {
 		c.now.markAsAvailable()
 		c.next()
 	}
@@ -523,7 +523,7 @@ func (c *pdServiceDiscovery) initRetry(f func() error) error {
 	var err error
 	ticker := time.NewTicker(time.Second)
 	defer ticker.Stop()
-	for i := 0; i < c.option.maxRetryTimes; i++ {
+	for range c.option.maxRetryTimes {
 		if err = f(); err == nil {
 			return nil
 		}
@@ -1093,7 +1093,7 @@ func (c *pdServiceDiscovery) updateServiceClient(members []*pdpb.Member, leader
 	})
 	c.all.Store(clients)
 	// create candidate services for all kinds of request.
-	for i := 0; i < int(apiKindCount); i++ {
+	for i := range apiKindCount {
 		c.apiCandidateNodes[i].set(clients)
 	}
 	return err

client/pd_service_discovery_test.go

@@ -137,7 +137,7 @@ func (suite *serviceClientTestSuite) SetupSuite() {
 	suite.followerServer = newTestServer(false)
 	go suite.leaderServer.run()
 	go suite.followerServer.run()
-	for i := 0; i < 10; i++ {
+	for range 10 {
 		leaderConn, err1 := grpc.Dial(suite.leaderServer.addr, grpc.WithTransportCredentials(insecure.NewCredentials()))
 		followerConn, err2 := grpc.Dial(suite.followerServer.addr, grpc.WithTransportCredentials(insecure.NewCredentials()))
 		if err1 == nil && err2 == nil {
@@ -278,7 +278,7 @@ func (suite *serviceClientTestSuite) TestServiceClientBalancer() {
 	b.set([]ServiceClient{leader, follower})
 	re.Equal(2, b.totalNode)
 
-	for i := 0; i < 10; i++ {
+	for range 10 {
 		client := b.get()
 		ctx := client.BuildGRPCTargetContext(suite.ctx, false)
 		conn := client.GetClientConn()
@@ -292,7 +292,7 @@ func (suite *serviceClientTestSuite) TestServiceClientBalancer() {
 	suite.followerServer.server.resetCount()
 	suite.leaderServer.server.resetCount()
 
-	for i := 0; i < 10; i++ {
+	for range 10 {
 		client := b.get()
 		ctx := client.BuildGRPCTargetContext(suite.ctx, true)
 		conn := client.GetClientConn()

client/resource_group/controller/controller.go

@@ -1347,7 +1347,7 @@ func (gc *groupCostController) acquireTokens(ctx context.Context, delta *rmpb.Co
 		d   time.Duration
 	)
 retryLoop:
-	for i := 0; i < gc.mainCfg.WaitRetryTimes; i++ {
+	for range gc.mainCfg.WaitRetryTimes {
 		now := time.Now()
 		switch gc.mode {
 		case rmpb.GroupMode_RawMode:

client/resource_group/controller/limiter_test.go

@@ -246,7 +246,7 @@ func testQPSCase(concurrency int, reserveN int64, limit int64) (qps float64, ru
 	var totalRequests int64
 	start := time.Now()
 
-	for i := 0; i < concurrency; i++ {
+	for range concurrency {
 		wg.Add(1)
 		go func() {
 			defer wg.Done()

client/resource_manager_client.go

@@ -382,7 +382,7 @@ func (c *client) tryResourceManagerConnect(ctx context.Context, connection *reso
 	)
 	ticker := time.NewTicker(retryInterval)
 	defer ticker.Stop()
-	for i := 0; i < maxRetryTimes; i++ {
+	for range maxRetryTimes {
 		cc, err := c.resourceManagerClient()
 		if err != nil {
 			continue
@@ -406,7 +406,7 @@ func (c *client) tryResourceManagerConnect(ctx context.Context, connection *reso
 }
 
 func (tbc *tokenBatchController) revokePendingTokenRequest(err error) {
-	for i := 0; i < len(tbc.tokenRequestCh); i++ {
+	for range len(tbc.tokenRequestCh) {
 		req := <-tbc.tokenRequestCh
 		req.done <- err
 	}

client/retry/backoff_test.go

@@ -70,7 +70,7 @@ func TestBackoffer(t *testing.T) {
 	bo = InitialBackoffer(base, max, total)
 	re.Equal(bo.nextInterval(), base)
 	re.Equal(bo.nextInterval(), 2*base)
-	for i := 0; i < 10; i++ {
+	for range 10 {
 		re.LessOrEqual(bo.nextInterval(), max)
 	}
 	re.Equal(bo.nextInterval(), max)

client/testutil/tempurl.go

@@ -31,7 +31,7 @@ var (
 
 // Alloc allocates a local URL for testing.
 func Alloc() string {
-	for i := 0; i < 10; i++ {
+	for range 10 {
 		if u := tryAllocTestURL(); u != "" {
 			return u
 		}

client/timerpool/pool_test.go

@@ -14,7 +14,7 @@ import (
 func TestTimerPool(t *testing.T) {
 	var tp TimerPool
 
-	for i := 0; i < 100; i++ {
+	for range 100 {
 		timer := tp.Get(20 * time.Millisecond)
 
 		select {

client/tso_batch_controller.go

@@ -211,7 +211,7 @@ func (tbc *tsoBatchController) adjustBestBatchSize() {
 }
 
 func (tbc *tsoBatchController) finishCollectedRequests(physical, firstLogical int64, suffixBits uint32, streamID string, err error) {
-	for i := 0; i < tbc.collectedRequestCount; i++ {
+	for i := range tbc.collectedRequestCount {
 		tsoReq := tbc.collectedRequests[i]
 		// Retrieve the request context before the request is done to trace without race.
 		requestCtx := tsoReq.requestCtx

client/tso_client.go

@@ -329,7 +329,7 @@ func (c *tsoClient) backupClientConn() (*grpc.ClientConn, string) {
 		cc  *grpc.ClientConn
 		err error
 	)
-	for i := 0; i < len(urls); i++ {
+	for range urls {
 		url := urls[rand.Intn(len(urls))]
 		if cc, err = c.svcDiscovery.GetOrCreateGRPCConn(url); err != nil {
 			continue
@@ -403,7 +403,7 @@ func (c *tsoClient) tryConnectToTSO(
 	ticker := time.NewTicker(retryInterval)
 	defer ticker.Stop()
 	// Retry several times before falling back to the follower when the network problem happens
-	for i := 0; i < maxRetryTimes; i++ {
+	for range maxRetryTimes {
 		c.svcDiscovery.ScheduleCheckMemberChanged()
 		cc, url = c.GetTSOAllocatorClientConnByDCLocation(dc)
 		if _, ok := connectionCtxs.Load(url); ok {

client/tso_dispatcher.go

@@ -168,7 +168,7 @@ func (td *tsoDispatcher) scheduleUpdateConnectionCtxs() {
 }
 
 func (td *tsoDispatcher) revokePendingRequests(err error) {
-	for i := 0; i < len(td.tsoRequestCh); i++ {
+	for range len(td.tsoRequestCh) {
 		req := <-td.tsoRequestCh
 		req.tryDone(err)
 	}

client/tso_dispatcher_test.go

@@ -231,7 +231,7 @@ func (s *testTSODispatcherSuite) testStaticConcurrencyImpl(concurrency int) {
 	// and will be batched together once there is a free token.
 	reqs := make([]*tsoRequest, 0, tokenCount+3)
 
-	for i := 0; i < tokenCount+3; i++ {
+	for range tokenCount + 3 {
 		req := s.sendReq(ctx)
 		s.reqMustNotReady(req)
 		reqs = append(reqs, req)
@@ -242,7 +242,7 @@ func (s *testTSODispatcherSuite) testStaticConcurrencyImpl(concurrency int) {
 	// second batch but not finished yet.
 	// Also note that in current implementation, the tsoStream tries to receive the next result before checking
 	// the `tsoStream.pendingRequests` queue. Changing this behavior may need to update this test.
-	for i := 0; i < tokenCount+3; i++ {
+	for i := range tokenCount + 3 {
 		expectedPending := tokenCount + 1 - i
 		if expectedPending > tokenCount {
 			expectedPending = tokenCount

client/tso_service_discovery.go

@@ -211,7 +211,7 @@ func (c *tsoServiceDiscovery) retry(
 	var err error
 	ticker := time.NewTicker(retryInterval)
 	defer ticker.Stop()
-	for i := 0; i < maxRetryTimes; i++ {
+	for range maxRetryTimes {
 		if err = f(); err == nil {
 			return nil
 		}

client/tso_stream_test.go

@@ -366,7 +366,7 @@ func (s *testTSOStreamSuite) TestTSOStreamBasic() {
 func (s *testTSOStreamSuite) testTSOStreamBrokenImpl(err error, pendingRequests int) {
 	var resultCh []<-chan callbackInvocation
 
-	for i := 0; i < pendingRequests; i++ {
+	for range pendingRequests {
 		ch := s.mustProcessRequestWithResultCh(1)
 		resultCh = append(resultCh, ch)
 		s.noResult(ch)
@@ -414,7 +414,7 @@ func (s *testTSOStreamSuite) TestTSOStreamCanceledWithPendingReq() {
 func (s *testTSOStreamSuite) TestTSOStreamFIFO() {
 	var resultChs []<-chan callbackInvocation
 	const count = 5
-	for i := 0; i < count; i++ {
+	for i := range count {
 		ch := s.mustProcessRequestWithResultCh(int64(i + 1))
 		resultChs = append(resultChs, ch)
 	}
@@ -423,7 +423,7 @@ func (s *testTSOStreamSuite) TestTSOStreamFIFO() {
 		s.noResult(ch)
 	}
 
-	for i := 0; i < count; i++ {
+	for i := range count {
 		s.inner.returnResult(int64((i+1)*10), int64(i), uint32(i+1))
 	}
 
@@ -505,7 +505,7 @@ func (s *testTSOStreamSuite) TestEstimatedLatency() {
 	reqStartTimeCh := make(chan time.Time, maxPendingRequestsInTSOStream)
 	// Limit concurrent requests to be less than the capacity of tsoStream.pendingRequests.
 	tokenCh := make(chan struct{}, maxPendingRequestsInTSOStream-1)
-	for i := 0; i < 40; i++ {
+	for range 40 {
 		tokenCh <- struct{}{}
 	}
 	// Return a result after 50ms delay for each requests
@@ -594,7 +594,7 @@ func TestRCFilter(t *testing.T) {
 	re.Equal(0.0, f.update(now, 0))
 	lastOutput := 0.0
 	// 10000 even samples in 1 second.
-	for i := 0; i < 10000; i++ {
+	for range 10000 {
 		now = now.Add(time.Microsecond * 100)
 		output := f.update(now, 1.0)
 		re.Greater(output, lastOutput)

pkg/autoscaling/prometheus_test.go

@@ -49,7 +49,7 @@ var podNameTemplate = map[ComponentType]string{
 func generatePodNames(component ComponentType) []string {
 	names := make([]string, 0, instanceCount)
 	pattern := podNameTemplate[component]
-	for i := 0; i < instanceCount; i++ {
+	for i := range instanceCount {
 		names = append(names, fmt.Sprintf(pattern, mockClusterName, i))
 	}
 	return names
@@ -119,7 +119,7 @@ func (c *normalClient) buildCPUMockData(component ComponentType) {
 	cpuQuotaQuery := cpuQuotaPromQLTemplate[component]
 
 	var results []result
-	for i := 0; i < instanceCount; i++ {
+	for i := range instanceCount {
 		results = append(results, result{
 			Value: []any{time.Now().Unix(), fmt.Sprintf("%f", mockResultValue)},
 			Metric: metric{
@@ -192,7 +192,7 @@ func TestRetrieveCPUMetrics(t *testing.T) {
 			options := NewQueryOptions(component, metric, addresses[:len(addresses)-1], time.Now(), mockDuration)
 			result, err := querier.Query(options)
 			re.NoError(err)
-			for i := 0; i < len(addresses)-1; i++ {
+			for i := range len(addresses) - 1 {
 				value, ok := result[addresses[i]]
 				re.True(ok)
 				re.Less(math.Abs(value-mockResultValue), 1e-6)

pkg/balancer/balancer_test.go

@@ -30,7 +30,7 @@ func TestBalancerPutAndDelete(t *testing.T) {
 		re.Equal(uint32(0), balancer.Next())
 		// test put
 		exists := make(map[uint32]struct{})
-		for i := 0; i < 100; i++ {
+		for range 100 {
 			num := rand.Uint32()
 			balancer.Put(num)
 			exists[num] = struct{}{}
@@ -77,12 +77,12 @@ func TestBalancerDuplicate(t *testing.T) {
 func TestRoundRobin(t *testing.T) {
 	re := require.New(t)
 	balancer := NewRoundRobin[uint32]()
-	for i := 0; i < 100; i++ {
+	for range 100 {
 		num := rand.Uint32()
 		balancer.Put(num)
 	}
 	statistics := make(map[uint32]int)
-	for i := 0; i < 1000; i++ {
+	for range 1000 {
 		statistics[balancer.Next()]++
 	}
 	min := 1000

pkg/btree/btree_generic_test.go

@@ -50,7 +50,7 @@ func perm(n int) (out []Int) {
 
 // rang returns an ordered list of Int items in the range [0, n).
 func rang(n int) (out []Int) {
-	for i := 0; i < n; i++ {
+	for i := range n {
 		out = append(out, Int(i))
 	}
 	return
@@ -101,10 +101,10 @@ func TestBTreeSizeInfo(t *testing.T) {
 		max, _ := tr.Max()
 		assertEq(t, "check max", tr.GetAt(tr.Len()-1), max)
 	}
-	for k := 0; k < treeSize; k++ {
+	for k := range treeSize {
 		assertEq(t, "get k-th", tr.GetAt(k), Int(k))
 	}
-	for x := Int(0); x < treeSize; x++ {
+	for x := range Int(treeSize) {
 		y, rk := tr.GetWithIndex(x)
 		assertEq(t, "get", y, x)
 		assertEq(t, "get rank", rk, int(x))
@@ -128,10 +128,10 @@ func TestBTreeSizeInfo(t *testing.T) {
 		max, _ := tr.Max()
 		assertEq(t, "after delete check max", tr.GetAt(tr.Len()-1), max)
 	}
-	for k := 0; k < treeSize/3; k++ {
+	for k := range treeSize / 3 {
 		assertEq(t, "after delete get k-th", tr.GetAt(k), Int(3*k))
 	}
-	for x := Int(0); x < treeSize; x++ {
+	for x := range Int(treeSize) {
 		y, rk := tr.GetWithIndex(x)
 		if x%3 == 0 {
 			assertEq(t, "after delete get", y, x)
@@ -169,7 +169,7 @@ func TestBTreeSizeInfo(t *testing.T) {
 func TestBTreeG(t *testing.T) {
 	tr := NewG[Int](*btreeDegree)
 	const treeSize = 10000
-	for i := 0; i < 10; i++ {
+	for range 10 {
 		if min, found := tr.Min(); found {
 			t.Fatalf("empty min, got %+v", min)
 		}
@@ -281,7 +281,7 @@ func TestDeleteMaxG(t *testing.T) {
 		got = append(got, v)
 	}
 	// Reverse our list.
-	for i := 0; i < len(got)/2; i++ {
+	for i := range len(got) / 2 {
 		got[i], got[len(got)-i-1] = got[len(got)-i-1], got[i]
 	}
 	if want := rang(100); !reflect.DeepEqual(got, want) {
@@ -786,7 +786,7 @@ func TestCloneConcurrentOperationsG(t *testing.T) {
 	}
 	t.Log("Removing half from first half")
 	toRemove := rang(cloneTestSize)[cloneTestSize/2:]
-	for i := 0; i < len(trees)/2; i++ {
+	for i := range len(trees) / 2 {
 		tree := trees[i]
 		wg.Add(1)
 		go func() {

pkg/cgroup/cgroup_cpu_test.go

@@ -67,7 +67,7 @@ func TestGetCgroupCPU(t *testing.T) {
 	re := require.New(t)
 	exit := make(chan struct{})
 	var wg sync.WaitGroup
-	for i := 0; i < 10; i++ {
+	for range 10 {
 		wg.Add(1)
 		go func() {
 			defer wg.Done()