fix lint and test

Author: Pearl1594

pkg/cloud/fake/fake.go

@@ -4,7 +4,7 @@ package fake
 
 import (
 	"context"
-	"fmt"
+	"errors"
 
 	"github.com/hashicorp/go-uuid"
 
@@ -80,7 +80,7 @@ func (f *fakeConnector) ListZonesID(_ context.Context) ([]string, error) {
 
 func (f *fakeConnector) GetVolumeByID(_ context.Context, volumeID string) (*cloud.Volume, error) {
 	if volumeID == "" {
-		return nil, fmt.Errorf("invalid volume ID: empty string")
+		return nil, errors.New("invalid volume ID: empty string")
 	}
 	vol, ok := f.volumesByID[volumeID]
 	if ok {
@@ -92,7 +92,7 @@ func (f *fakeConnector) GetVolumeByID(_ context.Context, volumeID string) (*clou
 
 func (f *fakeConnector) GetVolumeByName(_ context.Context, name string) (*cloud.Volume, error) {
 	if name == "" {
-		return nil, fmt.Errorf("invalid volume name: empty string")
+		return nil, errors.New("invalid volume name: empty string")
 	}
 	vol, ok := f.volumesByName[name]
 	if ok {
@@ -177,7 +177,7 @@ func (f *fakeConnector) DeleteSnapshot(ctx context.Context, snapshotID string) e
 
 func (f *fakeConnector) GetSnapshotByName(_ context.Context, name string) (*cloud.Snapshot, error) {
 	if name == "" {
-		return nil, fmt.Errorf("invalid snapshot name: empty string")
+		return nil, errors.New("invalid snapshot name: empty string")
 	}
 	if snap, ok := f.snapshotsByName[name]; ok {
 		return snap, nil

pkg/driver/controller.go

@@ -385,8 +385,27 @@ func (cs *controllerServer) CreateSnapshot(ctx context.Context, req *csi.CreateS
 }
 
 func (cs *controllerServer) ListSnapshots(ctx context.Context, req *csi.ListSnapshotsRequest) (*csi.ListSnapshotsResponse, error) {
-	// Stub implementation: returns an empty list
-	return &csi.ListSnapshotsResponse{Entries: []*csi.ListSnapshotsResponse_Entry{}}, nil
+	entries := []*csi.ListSnapshotsResponse_Entry{}
+
+	if req.GetSnapshotId() != "" {
+		snap, err := cs.connector.GetSnapshotByID(ctx, req.GetSnapshotId())
+		if err == nil && snap != nil {
+			t, _ := time.Parse("2006-01-02T15:04:05-0700", snap.CreatedAt)
+			ts := timestamppb.New(t)
+			entry := &csi.ListSnapshotsResponse_Entry{
+				Snapshot: &csi.Snapshot{
+					SnapshotId:     snap.ID,
+					SourceVolumeId: snap.VolumeID,
+					CreationTime:   ts,
+					ReadyToUse:     true,
+				},
+			}
+			entries = append(entries, entry)
+		}
+		return &csi.ListSnapshotsResponse{Entries: entries}, nil
+	}
+
+	return &csi.ListSnapshotsResponse{Entries: entries}, nil
 }
 
 func (cs *controllerServer) DeleteSnapshot(ctx context.Context, req *csi.DeleteSnapshotRequest) (*csi.DeleteSnapshotResponse, error) {