clientv3/integration: move isServerCtxTimeout to server_shutdown_test.go

Tests with cluster_proxy tags were failing, since isServerCtxTimeout
was defined with "+build !cluster_proxy".

Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>

clientv3/integration/network_partition_test.go

@@ -19,7 +19,6 @@ package integration
 import (
 	"context"
 	"errors"
-	"strings"
 	"testing"
 	"time"
 
@@ -27,8 +26,6 @@ import (
 	"github.com/coreos/etcd/etcdserver/api/v3rpc/rpctypes"
 	"github.com/coreos/etcd/integration"
 	"github.com/coreos/etcd/pkg/testutil"
-	"google.golang.org/grpc/codes"
-	"google.golang.org/grpc/status"
 )
 
 var errExpected = errors.New("expected error")
@@ -92,18 +89,6 @@ func TestBalancerUnderNetworkPartitionLinearizableGetWithShortTimeout(t *testing
 	}, time.Second)
 }
 
-// e.g. due to clock drifts in server-side,
-// client context times out first in server-side
-// while original client-side context is not timed out yet
-func isServerCtxTimeout(err error) bool {
-	if err == nil {
-		return false
-	}
-	ev, _ := status.FromError(err)
-	code := ev.Code()
-	return code == codes.DeadlineExceeded && strings.Contains(err.Error(), "context deadline exceeded")
-}
-
 func TestBalancerUnderNetworkPartitionSerializableGet(t *testing.T) {
 	testBalancerUnderNetworkPartition(t, func(cli *clientv3.Client, ctx context.Context) error {
 		_, err := cli.Get(ctx, "a", clientv3.WithSerializable())

clientv3/integration/server_shutdown_test.go

@@ -17,6 +17,7 @@ package integration
 import (
 	"bytes"
 	"context"
+	"strings"
 	"testing"
 	"time"
 
@@ -24,6 +25,9 @@ import (
 	"github.com/coreos/etcd/etcdserver/api/v3rpc/rpctypes"
 	"github.com/coreos/etcd/integration"
 	"github.com/coreos/etcd/pkg/testutil"
+
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
 )
 
 // TestBalancerUnderServerShutdownWatch expects that watch client
@@ -235,3 +239,15 @@ func testBalancerUnderServerShutdownImmutable(t *testing.T, op func(*clientv3.Cl
 		t.Errorf("failed to finish range request in time %v (timeout %v)", err, timeout)
 	}
 }
+
+// e.g. due to clock drifts in server-side,
+// client context times out first in server-side
+// while original client-side context is not timed out yet
+func isServerCtxTimeout(err error) bool {
+	if err == nil {
+		return false
+	}
+	ev, _ := status.FromError(err)
+	code := ev.Code()
+	return code == codes.DeadlineExceeded && strings.Contains(err.Error(), "context deadline exceeded")
+}