tests: remaining errors.Is conversions

tests/e2e/ctl_v3_member_test.go

@@ -17,6 +17,7 @@ package e2e
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 	"reflect"
@@ -193,7 +194,7 @@ func getMemberList(cx ctlCtx, serializable bool) (etcdserverpb.MemberListRespons
 
 	resp := etcdserverpb.MemberListResponse{}
 	dec := json.NewDecoder(strings.NewReader(txt))
-	if err := dec.Decode(&resp); err == io.EOF {
+	if err := dec.Decode(&resp); errors.Is(err, io.EOF) {
 		return etcdserverpb.MemberListResponse{}, err
 	}
 	return resp, nil
@@ -221,7 +222,7 @@ func memberListWithHexTest(cx ctlCtx) {
 	}
 	hexResp := etcdserverpb.MemberListResponse{}
 	dec := json.NewDecoder(strings.NewReader(txt))
-	if err := dec.Decode(&hexResp); err == io.EOF {
+	if err := dec.Decode(&hexResp); errors.Is(err, io.EOF) {
 		cx.t.Fatalf("memberListWithHexTest error (%v)", err)
 	}
 	num := len(resp.Members)

tests/e2e/ctl_v3_snapshot_test.go

@@ -17,6 +17,7 @@ package e2e
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 	"os"
@@ -156,7 +157,7 @@ func getSnapshotStatus(cx ctlCtx, fpath string) (snapshot.Status, error) {
 
 	resp := snapshot.Status{}
 	dec := json.NewDecoder(strings.NewReader(txt))
-	if err := dec.Decode(&resp); err == io.EOF {
+	if err := dec.Decode(&resp); errors.Is(err, io.EOF) {
 		return snapshot.Status{}, err
 	}
 	return resp, nil

tests/integration/clientv3/concurrency/example_mutex_test.go

@@ -16,6 +16,7 @@ package concurrency_test
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"log"
 
@@ -64,7 +65,7 @@ func ExampleMutex_TryLock() {
 			if err = m2.TryLock(context.TODO()); err == nil {
 				log.Fatal("should not acquire lock")
 			}
-			if err == concurrency.ErrLocked {
+			if errors.Is(err, concurrency.ErrLocked) {
 				fmt.Println("cannot acquire lock for s2, as already locked in another session")
 			}
 

tests/integration/clientv3/connectivity/black_hole_test.go

@@ -18,6 +18,7 @@ package connectivity_test
 
 import (
 	"context"
+	"errors"
 	"testing"
 	"time"
 
@@ -113,7 +114,7 @@ func TestBalancerUnderBlackholeKeepAliveWatch(t *testing.T) {
 func TestBalancerUnderBlackholeNoKeepAlivePut(t *testing.T) {
 	testBalancerUnderBlackholeNoKeepAlive(t, func(cli *clientv3.Client, ctx context.Context) error {
 		_, err := cli.Put(ctx, "foo", "bar")
-		if clientv3test.IsClientTimeout(err) || clientv3test.IsServerCtxTimeout(err) || err == rpctypes.ErrTimeout {
+		if clientv3test.IsClientTimeout(err) || clientv3test.IsServerCtxTimeout(err) || errors.Is(err, rpctypes.ErrTimeout) {
 			return errExpected
 		}
 		return err
@@ -123,7 +124,7 @@ func TestBalancerUnderBlackholeNoKeepAlivePut(t *testing.T) {
 func TestBalancerUnderBlackholeNoKeepAliveDelete(t *testing.T) {
 	testBalancerUnderBlackholeNoKeepAlive(t, func(cli *clientv3.Client, ctx context.Context) error {
 		_, err := cli.Delete(ctx, "foo")
-		if clientv3test.IsClientTimeout(err) || clientv3test.IsServerCtxTimeout(err) || err == rpctypes.ErrTimeout {
+		if clientv3test.IsClientTimeout(err) || clientv3test.IsServerCtxTimeout(err) || errors.Is(err, rpctypes.ErrTimeout) {
 			return errExpected
 		}
 		return err
@@ -136,7 +137,7 @@ func TestBalancerUnderBlackholeNoKeepAliveTxn(t *testing.T) {
 			If(clientv3.Compare(clientv3.Version("foo"), "=", 0)).
 			Then(clientv3.OpPut("foo", "bar")).
 			Else(clientv3.OpPut("foo", "baz")).Commit()
-		if clientv3test.IsClientTimeout(err) || clientv3test.IsServerCtxTimeout(err) || err == rpctypes.ErrTimeout {
+		if clientv3test.IsClientTimeout(err) || clientv3test.IsServerCtxTimeout(err) || errors.Is(err, rpctypes.ErrTimeout) {
 			return errExpected
 		}
 		return err
@@ -146,7 +147,7 @@ func TestBalancerUnderBlackholeNoKeepAliveTxn(t *testing.T) {
 func TestBalancerUnderBlackholeNoKeepAliveLinearizableGet(t *testing.T) {
 	testBalancerUnderBlackholeNoKeepAlive(t, func(cli *clientv3.Client, ctx context.Context) error {
 		_, err := cli.Get(ctx, "a")
-		if clientv3test.IsClientTimeout(err) || clientv3test.IsServerCtxTimeout(err) || err == rpctypes.ErrTimeout {
+		if clientv3test.IsClientTimeout(err) || clientv3test.IsServerCtxTimeout(err) || errors.Is(err, rpctypes.ErrTimeout) {
 			return errExpected
 		}
 		return err
@@ -207,7 +208,7 @@ func testBalancerUnderBlackholeNoKeepAlive(t *testing.T, op func(*clientv3.Clien
 		cancel()
 		if err == nil {
 			break
-		} else if err == errExpected {
+		} else if errors.Is(err, errExpected) {
 			t.Logf("#%d: current error %v", i, err)
 		} else {
 			t.Errorf("#%d: failed with error %v", i, err)

tests/integration/clientv3/connectivity/network_partition_test.go

@@ -35,7 +35,7 @@ var errExpected = errors.New("expected error")
 
 func isErrorExpected(err error) bool {
 	return clientv3test.IsClientTimeout(err) || clientv3test.IsServerCtxTimeout(err) ||
-		err == rpctypes.ErrTimeout || err == rpctypes.ErrTimeoutDueToLeaderFail
+		errors.Is(err, rpctypes.ErrTimeout) || errors.Is(err, rpctypes.ErrTimeoutDueToLeaderFail)
 }
 
 // TestBalancerUnderNetworkPartitionPut tests when one member becomes isolated,
@@ -145,7 +145,7 @@ func testBalancerUnderNetworkPartition(t *testing.T, op func(*clientv3.Client, c
 		if err == nil {
 			break
 		}
-		if err != errExpected {
+		if !errors.Is(err, errExpected) {
 			t.Errorf("#%d: expected '%v', got '%v'", i, errExpected, err)
 		}
 		// give enough time for endpoint switch
@@ -267,7 +267,7 @@ func testBalancerUnderNetworkPartitionWatch(t *testing.T, isolateLeader bool) {
 		if len(ev.Events) != 0 {
 			t.Fatal("expected no event")
 		}
-		if err = ev.Err(); err != rpctypes.ErrNoLeader {
+		if err = ev.Err(); !errors.Is(err, rpctypes.ErrNoLeader) {
 			t.Fatalf("expected %v, got %v", rpctypes.ErrNoLeader, err)
 		}
 	case <-time.After(integration2.RequestWaitTimeout): // enough time to detect leader lost
@@ -313,7 +313,7 @@ func TestDropReadUnderNetworkPartition(t *testing.T) {
 	ctx, cancel := context.WithTimeout(context.TODO(), 10*time.Second)
 	_, err = kvc.Get(ctx, "a")
 	cancel()
-	if err != rpctypes.ErrLeaderChanged {
+	if !errors.Is(err, rpctypes.ErrLeaderChanged) {
 		t.Fatalf("expected %v, got %v", rpctypes.ErrLeaderChanged, err)
 	}
 
@@ -322,7 +322,7 @@ func TestDropReadUnderNetworkPartition(t *testing.T) {
 		_, err = kvc.Get(ctx, "a")
 		cancel()
 		if err != nil {
-			if err == rpctypes.ErrTimeout {
+			if errors.Is(err, rpctypes.ErrTimeout) {
 				<-time.After(time.Second)
 				i++
 				continue

tests/integration/clientv3/connectivity/server_shutdown_test.go

@@ -17,6 +17,7 @@ package connectivity_test
 import (
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
 	"testing"
 	"time"
@@ -101,7 +102,7 @@ func TestBalancerUnderServerShutdownWatch(t *testing.T) {
 		if err == nil {
 			break
 		}
-		if clientv3test.IsClientTimeout(err) || clientv3test.IsServerCtxTimeout(err) || err == rpctypes.ErrTimeout || err == rpctypes.ErrTimeoutDueToLeaderFail {
+		if clientv3test.IsClientTimeout(err) || clientv3test.IsServerCtxTimeout(err) || errors.Is(err, rpctypes.ErrTimeout) || errors.Is(err, rpctypes.ErrTimeoutDueToLeaderFail) {
 			continue
 		}
 		t.Fatal(err)

tests/integration/clientv3/experimental/recipes/v3_double_barrier_test.go

@@ -16,6 +16,7 @@ package recipes_test
 
 import (
 	"context"
+	"errors"
 	"sync"
 	"testing"
 	"time"
@@ -149,7 +150,7 @@ func TestDoubleBarrierTooManyClients(t *testing.T) {
 	// no any other client can enter the barrier.
 	wgEntered.Wait()
 	t.Log("Try to enter into double barrier")
-	if err = b.Enter(); err != recipe.ErrTooManyClients {
+	if err = b.Enter(); !errors.Is(err, recipe.ErrTooManyClients) {
 		t.Errorf("Unexcepted error, expected: ErrTooManyClients, got: %v", err)
 	}
 

tests/integration/clientv3/experimental/recipes/v3_lock_test.go

@@ -16,6 +16,7 @@ package recipes_test
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"math/rand"
 	"sync"
@@ -139,7 +140,7 @@ func testMutexTryLock(t *testing.T, lockers int, chooseClient func() *clientv3.C
 				case <-ctx.Done():
 					t.Errorf("Thread: %v, Context failed: %v", i, err)
 				}
-			} else if err == concurrency.ErrLocked {
+			} else if errors.Is(err, concurrency.ErrLocked) {
 				select {
 				case notlockedC <- m:
 				case <-ctx.Done():

tests/integration/clientv3/lease/leasing_test.go

@@ -16,6 +16,7 @@ package lease_test
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"math/rand"
 	"reflect"
@@ -895,7 +896,7 @@ func TestLeasingTxnCancel(t *testing.T) {
 		time.Sleep(100 * time.Millisecond)
 		cancel()
 	}()
-	if _, err := lkv2.Txn(ctx).Then(clientv3.OpPut("k", "v")).Commit(); err != context.Canceled {
+	if _, err := lkv2.Txn(ctx).Then(clientv3.OpPut("k", "v")).Commit(); !errors.Is(err, context.Canceled) {
 		t.Fatalf("expected %v, got %v", context.Canceled, err)
 	}
 }
@@ -2017,7 +2018,7 @@ func TestLeasingSessionExpireCancel(t *testing.T) {
 
 			select {
 			case err := <-errc:
-				if err != ctx.Err() {
+				if !errors.Is(err, ctx.Err()) {
 					t.Errorf("#%d: expected %v of server unavailable, got %v", i, ctx.Err(), err)
 				}
 			case <-time.After(5 * time.Second):
@@ -2048,7 +2049,7 @@ func waitForExpireAck(t *testing.T, kv clientv3.KV) {
 		ctx, cancel := context.WithTimeout(context.TODO(), time.Second)
 		_, err := kv.Get(ctx, "abc")
 		cancel()
-		if err == ctx.Err() {
+		if errors.Is(err, ctx.Err()) {
 			return
 		} else if err != nil {
 			t.Logf("current error: %v", err)

tests/integration/clientv3/maintenance_test.go

@@ -18,6 +18,7 @@ import (
 	"bytes"
 	"context"
 	"crypto/sha256"
+	"errors"
 	"fmt"
 	"io"
 	"math"
@@ -135,7 +136,7 @@ func TestMaintenanceMoveLeader(t *testing.T) {
 
 	cli := clus.Client(targetIdx)
 	_, err := cli.MoveLeader(context.Background(), target)
-	if err != rpctypes.ErrNotLeader {
+	if !errors.Is(err, rpctypes.ErrNotLeader) {
 		t.Fatalf("error expected %v, got %v", rpctypes.ErrNotLeader, err)
 	}
 
@@ -186,7 +187,7 @@ func TestMaintenanceSnapshotCancel(t *testing.T) {
 
 	cancel()
 	_, err = io.Copy(io.Discard, rc1)
-	if err != context.Canceled {
+	if !errors.Is(err, context.Canceled) {
 		t.Errorf("expected %v, got %v", context.Canceled, err)
 	}
 }
@@ -303,7 +304,7 @@ func testMaintenanceSnapshotErrorInflight(t *testing.T, snapshot func(context.Co
 		close(donec)
 	}()
 	_, err = io.Copy(io.Discard, rc1)
-	if err != nil && err != context.Canceled {
+	if err != nil && !errors.Is(err, context.Canceled) {
 		t.Errorf("expected %v, got %v", context.Canceled, err)
 	}
 	<-donec

tests/integration/clientv3/ordering_kv_test.go

@@ -89,7 +89,7 @@ func TestDetectKvOrderViolation(t *testing.T) {
 	t.Logf("Quering m2 after restart")
 	v, err = orderingKv.Get(ctx, "foo", clientv3.WithSerializable())
 	t.Logf("Quering m2 returned: v:%v err:%v ", v, err)
-	if err != errOrderViolation {
+	if !errors.Is(err, errOrderViolation) {
 		t.Fatalf("expected %v, got err:%v v:%v", errOrderViolation, err, v)
 	}
 }
@@ -155,7 +155,7 @@ func TestDetectTxnOrderViolation(t *testing.T) {
 	cli.SetEndpoints(clus.Members[2].GRPCURL)
 	time.Sleep(2 * time.Second) // FIXME: Figure out how pause SetEndpoints sufficiently that this is not needed
 	_, err = orderingKv.Get(ctx, "foo", clientv3.WithSerializable())
-	if err != errOrderViolation {
+	if !errors.Is(err, errOrderViolation) {
 		t.Fatalf("expected %v, got %v", errOrderViolation, err)
 	}
 	orderingTxn = orderingKv.Txn(ctx)
@@ -164,7 +164,7 @@ func TestDetectTxnOrderViolation(t *testing.T) {
 	).Then(
 		clientv3.OpGet("foo", clientv3.WithSerializable()),
 	).Commit()
-	if err != errOrderViolation {
+	if !errors.Is(err, errOrderViolation) {
 		t.Fatalf("expected %v, got %v", errOrderViolation, err)
 	}
 }

tests/integration/clientv3/ordering_util_test.go

@@ -16,6 +16,7 @@ package clientv3test
 
 import (
 	"context"
+	"errors"
 	"testing"
 	"time"
 
@@ -78,7 +79,7 @@ func TestEndpointSwitchResolvesViolation(t *testing.T) {
 	cli.SetEndpoints(clus.Members[2].GRPCURL)
 	time.Sleep(1 * time.Second) // give enough time for the operation
 	_, err = orderingKv.Get(ctx, "foo", clientv3.WithSerializable())
-	if err != ordering.ErrNoGreaterRev {
+	if !errors.Is(err, ordering.ErrNoGreaterRev) {
 		t.Fatal("While speaking to partitioned leader, we should get ErrNoGreaterRev error")
 	}
 
@@ -156,7 +157,7 @@ func TestUnresolvableOrderViolation(t *testing.T) {
 	time.Sleep(1 * time.Second) // give enough time for operation
 
 	_, err = OrderingKv.Get(ctx, "foo", clientv3.WithSerializable())
-	if err != ordering.ErrNoGreaterRev {
+	if !errors.Is(err, ordering.ErrNoGreaterRev) {
 		t.Fatalf("expected %v, got %v", ordering.ErrNoGreaterRev, err)
 	}
 }

tests/integration/clientv3/txn_test.go

@@ -16,6 +16,7 @@ package clientv3test
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"testing"
 	"time"
@@ -36,7 +37,7 @@ func TestTxnError(t *testing.T) {
 	ctx := context.TODO()
 
 	_, err := kv.Txn(ctx).Then(clientv3.OpPut("foo", "bar1"), clientv3.OpPut("foo", "bar2")).Commit()
-	if err != rpctypes.ErrDuplicateKey {
+	if !errors.Is(err, rpctypes.ErrDuplicateKey) {
 		t.Fatalf("expected %v, got %v", rpctypes.ErrDuplicateKey, err)
 	}
 
@@ -45,7 +46,7 @@ func TestTxnError(t *testing.T) {
 		ops[i] = clientv3.OpPut(fmt.Sprintf("foo%d", i), "")
 	}
 	_, err = kv.Txn(ctx).Then(ops...).Commit()
-	if err != rpctypes.ErrTooManyOps {
+	if !errors.Is(err, rpctypes.ErrTooManyOps) {
 		t.Fatalf("expected %v, got %v", rpctypes.ErrTooManyOps, err)
 	}
 }