tests: Extract e2e test utils

Consider creating generic testutils for both e2e and integration tests.

Signed-off-by: Marek Siarkowicz <siarkowicz@google.com>

tests/e2e/utils.go

@@ -0,0 +1,97 @@
+// Copyright 2023 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 (
+	"context"
+	"fmt"
+	"testing"
+	"time"
+
+	"go.uber.org/zap"
+	"golang.org/x/sync/errgroup"
+	"google.golang.org/grpc"
+
+	"go.etcd.io/etcd/client/pkg/v3/transport"
+	clientv3 "go.etcd.io/etcd/client/v3"
+	"go.etcd.io/etcd/pkg/v3/stringutil"
+	"go.etcd.io/etcd/tests/v3/framework/e2e"
+	"go.etcd.io/etcd/tests/v3/framework/integration"
+)
+
+func newClient(t *testing.T, entpoints []string, cfg e2e.ClientConfig) *clientv3.Client {
+	tlscfg, err := tlsInfo(t, cfg)
+	if err != nil {
+		t.Fatal(err)
+	}
+	ccfg := clientv3.Config{
+		Endpoints:   entpoints,
+		DialTimeout: 5 * time.Second,
+		DialOptions: []grpc.DialOption{grpc.WithBlock()},
+	}
+	if tlscfg != nil {
+		tls, err := tlscfg.ClientConfig()
+		if err != nil {
+			t.Fatal(err)
+		}
+		ccfg.TLS = tls
+	}
+	c, err := clientv3.New(ccfg)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() {
+		c.Close()
+	})
+	return c
+}
+
+func tlsInfo(t testing.TB, cfg e2e.ClientConfig) (*transport.TLSInfo, error) {
+	switch cfg.ConnectionType {
+	case e2e.ClientNonTLS, e2e.ClientTLSAndNonTLS:
+		return nil, nil
+	case e2e.ClientTLS:
+		if cfg.AutoTLS {
+			tls, err := transport.SelfCert(zap.NewNop(), t.TempDir(), []string{"localhost"}, 1)
+			if err != nil {
+				return nil, fmt.Errorf("failed to generate cert: %s", err)
+			}
+			return &tls, nil
+		} else {
+			return &integration.TestTLSInfo, nil
+		}
+	default:
+		return nil, fmt.Errorf("config %v not supported", cfg)
+	}
+}
+
+func fillEtcdWithData(ctx context.Context, c *clientv3.Client, keyCount int, valueSize uint) error {
+	g := errgroup.Group{}
+	concurrency := 10
+	keysPerRoutine := keyCount / concurrency
+	for i := 0; i < concurrency; i++ {
+		i := i
+		g.Go(func() error {
+			for j := 0; j < keysPerRoutine; j++ {
+				_, err := c.Put(ctx, fmt.Sprintf("%d", i*keysPerRoutine+j), stringutil.RandString(valueSize))
+				if err != nil {
+					return err
+				}
+			}
+			return nil
+		})
+	}
+	return g.Wait()
+}

tests/e2e/watch_delay_test.go

@@ -26,15 +26,10 @@ import (
 	"time"
 
 	"github.com/stretchr/testify/require"
-	"go.uber.org/zap"
 	"golang.org/x/sync/errgroup"
-	"google.golang.org/grpc"
 
-	"go.etcd.io/etcd/client/pkg/v3/transport"
 	clientv3 "go.etcd.io/etcd/client/v3"
-	"go.etcd.io/etcd/pkg/v3/stringutil"
 	"go.etcd.io/etcd/tests/v3/framework/e2e"
-	"go.etcd.io/etcd/tests/v3/framework/integration"
 )
 
 const (
@@ -180,25 +175,6 @@ func validateWatchDelay(t *testing.T, watch clientv3.WatchChan) {
 	}
 }
 
-func fillEtcdWithData(ctx context.Context, c *clientv3.Client, keyCount int, valueSize uint) error {
-	g := errgroup.Group{}
-	concurrency := 10
-	keysPerRoutine := keyCount / concurrency
-	for i := 0; i < concurrency; i++ {
-		i := i
-		g.Go(func() error {
-			for j := 0; j < keysPerRoutine; j++ {
-				_, err := c.Put(ctx, fmt.Sprintf("%d", i*keysPerRoutine+j), stringutil.RandString(valueSize))
-				if err != nil {
-					return err
-				}
-			}
-			return nil
-		})
-	}
-	return g.Wait()
-}
-
 func continuouslyExecuteGetAll(ctx context.Context, t *testing.T, g *errgroup.Group, c *clientv3.Client) {
 	mux := sync.RWMutex{}
 	size := 0
@@ -235,49 +211,3 @@ func continuouslyExecuteGetAll(ctx context.Context, t *testing.T, g *errgroup.Gr
 		return nil
 	})
 }
-
-func newClient(t *testing.T, entpoints []string, cfg e2e.ClientConfig) *clientv3.Client {
-	tlscfg, err := tlsInfo(t, cfg)
-	if err != nil {
-		t.Fatal(err)
-	}
-	ccfg := clientv3.Config{
-		Endpoints:   entpoints,
-		DialTimeout: 5 * time.Second,
-		DialOptions: []grpc.DialOption{grpc.WithBlock()},
-	}
-	if tlscfg != nil {
-		tls, err := tlscfg.ClientConfig()
-		if err != nil {
-			t.Fatal(err)
-		}
-		ccfg.TLS = tls
-	}
-	c, err := clientv3.New(ccfg)
-	if err != nil {
-		t.Fatal(err)
-	}
-	t.Cleanup(func() {
-		c.Close()
-	})
-	return c
-}
-
-func tlsInfo(t testing.TB, cfg e2e.ClientConfig) (*transport.TLSInfo, error) {
-	switch cfg.ConnectionType {
-	case e2e.ClientNonTLS, e2e.ClientTLSAndNonTLS:
-		return nil, nil
-	case e2e.ClientTLS:
-		if cfg.AutoTLS {
-			tls, err := transport.SelfCert(zap.NewNop(), t.TempDir(), []string{"localhost"}, 1)
-			if err != nil {
-				return nil, fmt.Errorf("failed to generate cert: %s", err)
-			}
-			return &tls, nil
-		} else {
-			return &integration.TestTLSInfo, nil
-		}
-	default:
-		return nil, fmt.Errorf("config %v not supported", cfg)
-	}
-}