add unit test

cdc/capture/capture_test.go

@@ -0,0 +1,79 @@
+// Copyright 2021 PingCAP, Inc.
+//
+// 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,
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package capture
+
+import (
+	"context"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/pingcap/tiflow/pkg/etcd"
+	"github.com/stretchr/testify/require"
+	"go.etcd.io/etcd/clientv3"
+	"go.etcd.io/etcd/pkg/logutil"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/backoff"
+)
+
+func TestReset(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+
+	// init etcd mocker
+	clientURL, etcdServer, err := etcd.SetupEmbedEtcd(t.TempDir())
+	require.Nil(t, err)
+	logConfig := logutil.DefaultZapLoggerConfig
+	logConfig.Level = zap.NewAtomicLevelAt(zapcore.ErrorLevel)
+
+	etcdCli, err := clientv3.New(clientv3.Config{
+		Endpoints:   []string{clientURL.String()},
+		Context:     ctx,
+		LogConfig:   &logConfig,
+		DialTimeout: 3 * time.Second,
+		DialOptions: []grpc.DialOption{
+			grpc.WithBlock(),
+			grpc.WithConnectParams(grpc.ConnectParams{
+				Backoff: backoff.Config{
+					BaseDelay:  time.Second,
+					Multiplier: 1.1,
+					Jitter:     0.1,
+					MaxDelay:   3 * time.Second,
+				},
+				MinConnectTimeout: 3 * time.Second,
+			}),
+		},
+	})
+	require.NoError(t, err)
+	client := etcd.NewCDCEtcdClient(context.TODO(), etcdCli)
+
+	cp := NewCapture4Test(nil)
+	cp.EtcdClient = &client
+
+	// simulate network isolation scenarios
+	etcdServer.Close()
+	wg := sync.WaitGroup{}
+	wg.Add(1)
+	go func() {
+		err = cp.reset(ctx)
+		require.Regexp(t, ".*context canceled.*", err)
+		wg.Done()
+	}()
+	time.Sleep(100 * time.Millisecond)
+	info := cp.Info()
+	require.NotNil(t, info)
+	cancel()
+	wg.Wait()
+}

cdc/capture/main_test.go

@@ -0,0 +1,31 @@
+// Copyright 2022 PingCAP, Inc.
+//
+// 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,
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package capture
+
+import (
+	"testing"
+
+	"github.com/pingcap/tiflow/pkg/leakutil"
+	"go.uber.org/goleak"
+)
+
+func TestMain(m *testing.M) {
+	opts := []goleak.Option{
+		// TODO: temporarily ignore leaking goroutines
+		goleak.IgnoreTopFunction("google.golang.org/grpc.(*ccBalancerWrapper).watcher"),
+		goleak.IgnoreTopFunction("google.golang.org/grpc.(*addrConn).resetTransport"),
+	}
+
+	leakutil.SetUpLeakTest(m, opts...)
+}