test: improve test coverage for pkg/datasource/sql/undo (#971)

* test: improve test coverage for pkg/datasource/sql/undo

* fix: correct spelling errors

* style: format code with go fmt for undo package

* Correcting spelling errors

* fix: skip mysql undo manager tests requiring database connections

* fix: resolve staticcheck SA4006 unused variable warnings

Move manager variable creation after t.Skip() calls in MySQL undo tests
to prevent unused variable warnings from golangci-lint staticcheck.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

* Conflict handling

* reslove conficts

* test: improve test coverage for pkg/datasource/sql/undo package

* style: apply gofmt fixes

* improve test coverage for pkg/datasource/sql/undo

---------

Co-authored-by: Claude <[email protected]>

Author: LucienShen-Liu

go.mod

@@ -82,6 +82,7 @@ require (
 	github.com/prometheus/procfs v0.7.3 // indirect
 	github.com/satori/go.uuid v1.2.1-0.20181028125025-b2ce2384e17b // indirect
 	github.com/shirou/gopsutil/v3 v3.22.2 // indirect
+	github.com/stretchr/objx v0.5.0 // indirect
 	github.com/tklauser/go-sysconf v0.3.10 // indirect
 	github.com/tklauser/numcpus v0.4.0 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect

go.sum

@@ -715,6 +715,7 @@ github.com/streadway/handy v0.0.0-20190108123426-d5acb3125c2a/go.mod h1:qNTQ5P5J
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/objx v0.5.0 h1:1zr/of2m5FGMsad5YfcqgdqdWrIhu+EBEJRhR1U7z/c=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=

pkg/datasource/sql/undo/base/undo.go

@@ -238,7 +238,7 @@ func (m *BaseUndoLogManager) FlushUndoLog(tranCtx *types.TransactionContext, con
 		XID:          tranCtx.XID,
 		Context:      undoLogContent,
 		RollbackInfo: rollbackInfo,
-		LogStatus:    undo.UndoLogStatueNormnal,
+		LogStatus:    undo.UndoLogStatusNormal,
 	}, conn)
 }
 
@@ -368,13 +368,13 @@ func (m *BaseUndoLogManager) Undo(ctx context.Context, dbType types.DBType, xid
 			log.Errorf("[Undo] delete undo fail, err: %v", err)
 			return err
 		}
-		log.Infof("xid %v branch %v, undo_log deleted with %v", xid, branchID, undo.UndoLogStatueGlobalFinished)
+		log.Infof("xid %v branch %v, undo_log deleted with %v", xid, branchID, undo.UndoLogStatusGlobalFinished)
 	} else {
 		if err = m.insertUndoLogWithGlobalFinished(ctx, xid, uint64(branchID), conn); err != nil {
 			log.Errorf("[Undo] insert undo with global finished fail, err: %v", err)
 			return err
 		}
-		log.Infof("xid %v branch %v, undo_log added with %v", xid, branchID, undo.UndoLogStatueGlobalFinished)
+		log.Infof("xid %v branch %v, undo_log added with %v", xid, branchID, undo.UndoLogStatusGlobalFinished)
 	}
 
 	if err = tx.Commit(); err != nil {