lightning: move TestCheckRequirementsTiFlash out of local package

br/pkg/lightning/backend/local/BUILD.bazel

@@ -88,6 +88,7 @@ go_test(
         "engine_test.go",
         "iterator_test.go",
         "key_adapter_test.go",
+        "local_check_test.go",
         "local_test.go",
         "localhelper_test.go",
     ],

br/pkg/lightning/backend/local/local.go

@@ -279,6 +279,9 @@ func checkTiDBVersion(_ context.Context, versionStr string, requiredMinVersion,
 
 var tiFlashReplicaQuery = "SELECT TABLE_SCHEMA, TABLE_NAME FROM information_schema.TIFLASH_REPLICA WHERE REPLICA_COUNT > 0;"
 
+// TiFlashReplicaQueryForTest is only used for tests.
+var TiFlashReplicaQueryForTest = tiFlashReplicaQuery
+
 type tblName struct {
 	schema string
 	name   string
@@ -299,6 +302,9 @@ func (t tblNames) String() string {
 	return b.String()
 }
 
+// CheckTiFlashVersionForTest is only used for tests.
+var CheckTiFlashVersionForTest = checkTiFlashVersion
+
 // check TiFlash replicas.
 // local backend doesn't support TiFlash before tidb v4.0.5
 func checkTiFlashVersion(ctx context.Context, g glue.Glue, checkCtx *backend.CheckCtx, tidbVersion semver.Version) error {

br/pkg/lightning/backend/local/local_check_test.go

@@ -0,0 +1,77 @@
+// 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,
+// 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 local_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/coreos/go-semver/semver"
+	"github.com/golang/mock/gomock"
+	"github.com/pingcap/tidb/br/pkg/lightning/backend"
+	"github.com/pingcap/tidb/br/pkg/lightning/backend/local"
+	"github.com/pingcap/tidb/br/pkg/lightning/mydump"
+	"github.com/pingcap/tidb/br/pkg/mock"
+	"github.com/stretchr/testify/require"
+)
+
+func TestCheckRequirementsTiFlash(t *testing.T) {
+	controller := gomock.NewController(t)
+	defer controller.Finish()
+	glue := mock.NewMockGlue(controller)
+	exec := mock.NewMockSQLExecutor(controller)
+	ctx := context.Background()
+
+	dbMetas := []*mydump.MDDatabaseMeta{
+		{
+			Name: "test",
+			Tables: []*mydump.MDTableMeta{
+				{
+					DB:        "test",
+					Name:      "t1",
+					DataFiles: []mydump.FileInfo{{}},
+				},
+				{
+					DB:        "test",
+					Name:      "tbl",
+					DataFiles: []mydump.FileInfo{{}},
+				},
+			},
+		},
+		{
+			Name: "test1",
+			Tables: []*mydump.MDTableMeta{
+				{
+					DB:        "test1",
+					Name:      "t",
+					DataFiles: []mydump.FileInfo{{}},
+				},
+				{
+					DB:        "test1",
+					Name:      "tbl",
+					DataFiles: []mydump.FileInfo{{}},
+				},
+			},
+		},
+	}
+	checkCtx := &backend.CheckCtx{DBMetas: dbMetas}
+
+	glue.EXPECT().GetSQLExecutor().Return(exec)
+	exec.EXPECT().QueryStringsWithLog(ctx, local.TiFlashReplicaQueryForTest, gomock.Any(), gomock.Any()).
+		Return([][]string{{"db", "tbl"}, {"test", "t1"}, {"test1", "tbl"}}, nil)
+
+	err := local.CheckTiFlashVersionForTest(ctx, glue, checkCtx, *semver.New("4.0.2"))
+	require.Regexp(t, "^lightning local backend doesn't support TiFlash in this TiDB version. conflict tables: \\[`test`.`t1`, `test1`.`tbl`\\]", err.Error())
+}

br/pkg/lightning/backend/local/local_test.go

@@ -30,9 +30,7 @@ import (
 	"testing"
 
 	"github.com/cockroachdb/pebble"
-	"github.com/coreos/go-semver/semver"
 	"github.com/docker/go-units"
-	"github.com/golang/mock/gomock"
 	"github.com/google/uuid"
 	"github.com/pingcap/errors"
 	"github.com/pingcap/failpoint"
@@ -44,9 +42,7 @@ import (
 	"github.com/pingcap/tidb/br/pkg/lightning/backend/kv"
 	"github.com/pingcap/tidb/br/pkg/lightning/common"
 	"github.com/pingcap/tidb/br/pkg/lightning/log"
-	"github.com/pingcap/tidb/br/pkg/lightning/mydump"
 	"github.com/pingcap/tidb/br/pkg/membuf"
-	"github.com/pingcap/tidb/br/pkg/mock"
 	"github.com/pingcap/tidb/br/pkg/pdutil"
 	"github.com/pingcap/tidb/br/pkg/restore/split"
 	"github.com/pingcap/tidb/br/pkg/utils"
@@ -653,55 +649,6 @@ func TestLocalIngestLoop(t *testing.T) {
 	require.Equal(t, atomic.LoadInt32(&maxMetaSeq), f.finishedMetaSeq.Load())
 }
 
-func TestCheckRequirementsTiFlash(t *testing.T) {
-	controller := gomock.NewController(t)
-	defer controller.Finish()
-	glue := mock.NewMockGlue(controller)
-	exec := mock.NewMockSQLExecutor(controller)
-	ctx := context.Background()
-
-	dbMetas := []*mydump.MDDatabaseMeta{
-		{
-			Name: "test",
-			Tables: []*mydump.MDTableMeta{
-				{
-					DB:        "test",
-					Name:      "t1",
-					DataFiles: []mydump.FileInfo{{}},
-				},
-				{
-					DB:        "test",
-					Name:      "tbl",
-					DataFiles: []mydump.FileInfo{{}},
-				},
-			},
-		},
-		{
-			Name: "test1",
-			Tables: []*mydump.MDTableMeta{
-				{
-					DB:        "test1",
-					Name:      "t",
-					DataFiles: []mydump.FileInfo{{}},
-				},
-				{
-					DB:        "test1",
-					Name:      "tbl",
-					DataFiles: []mydump.FileInfo{{}},
-				},
-			},
-		},
-	}
-	checkCtx := &backend.CheckCtx{DBMetas: dbMetas}
-
-	glue.EXPECT().GetSQLExecutor().Return(exec)
-	exec.EXPECT().QueryStringsWithLog(ctx, tiFlashReplicaQuery, gomock.Any(), gomock.Any()).
-		Return([][]string{{"db", "tbl"}, {"test", "t1"}, {"test1", "tbl"}}, nil)
-
-	err := checkTiFlashVersion(ctx, glue, checkCtx, *semver.New("4.0.2"))
-	require.Regexp(t, "^lightning local backend doesn't support TiFlash in this TiDB version. conflict tables: \\[`test`.`t1`, `test1`.`tbl`\\]", err.Error())
-}
-
 func makeRanges(input []string) []Range {
 	ranges := make([]Range, 0, len(input)/2)
 	for i := 0; i < len(input)-1; i += 2 {