tests: Implement bench for List (#687)

* tests: Implement bench for List

Signed-off-by: Xuanwo <github@xuanwo.io>

* Update storager_bench_test.go

* tests: Fix format

Signed-off-by: Xuanwo <github@xuanwo.io>

tests/storage.go

@@ -11,6 +11,8 @@ type Storage struct {
 	defaultPairs DefaultStoragePairs
 	features     StorageFeatures
 
+	objects []*Object
+
 	UnimplementedCopier
 	UnimplementedFetcher
 	UnimplementedMover
@@ -53,7 +55,11 @@ func (s *Storage) fetch(ctx context.Context, path string, url string, opt pairSt
 }
 
 func (s *Storage) list(ctx context.Context, path string, opt pairStorageList) (oi *ObjectIterator, err error) {
-	panic("not implemented")
+	fn := NextObjectFunc(func(ctx context.Context, page *ObjectPage) error {
+		page.Data = s.objects
+		return nil
+	})
+	return NewObjectIterator(ctx, fn, nil), nil
 }
 
 func (s *Storage) listMultipart(ctx context.Context, o *Object, opt pairStorageListMultipart) (pi *PartIterator, err error) {

tests/storager_bench_test.go

@@ -1,6 +1,11 @@
 package tests
 
-import "testing"
+import (
+	"context"
+	"testing"
+
+	"github.com/beyondstorage/go-storage/v4/types"
+)
 
 func BenchmarkStorage_Stat(b *testing.B) {
 	s, err := NewStorager()
@@ -12,3 +17,25 @@ func BenchmarkStorage_Stat(b *testing.B) {
 		_, _ = s.Stat("abc")
 	}
 }
+
+func BenchmarkStorage_List(b *testing.B) {
+	ctx := context.TODO()
+
+	var ob []*types.Object
+	for i := 0; i < 1024; i++ {
+		ob = append(ob, &types.Object{})
+	}
+
+	s := &Storage{
+		objects: ob,
+	}
+
+	it, err := s.list(ctx, "", pairStorageList{})
+	if err != nil {
+		b.Fatal(err)
+	}
+
+	for i := 0; i < b.N; i++ {
+		_, _ = it.Next()
+	}
+}