Merge branch 'cherry-pick-083aaf1f' into 'release/0.19'

fix(sync): Исправлена ошибка синхронизации "received message larger than max"....

See merge request perxis/perxis-go!160

pkg/items/dummy.go

+package items
+
+import "context"
+
+type FindResultDummy struct {
+	Items []*Item
+	Total int
+	Error error
+}
+type Dummy struct {
+	Items
+	FindResult *FindResultDummy
+}
+
+func (d *Dummy) Find(_ context.Context, _, _, _ string, _ *Filter, _ ...*FindOptions) ([]*Item, int, error) {
+	return d.FindResult.Items, d.FindResult.Total, d.FindResult.Error
+}

pkg/items/pagination.go

@@ -128,6 +128,11 @@ func (b *BatchProcessor) Do(ctx context.Context, f func(batch []*Item) error) (i
 			return 0, err
 		}
 
+		// на случай, когда первый запрос вернул 0 элементов
+		if len(batch) == 0 {
+			break
+		}
+
 		if err = f(batch); err != nil {
 			return 0, err
 		}

pkg/items/pagination_test.go

+package items
+
+import (
+	"context"
+	"testing"
+
+	"git.perx.ru/perxis/perxis-go/pkg/environments"
+	"git.perx.ru/perxis/perxis-go/pkg/options"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestBatchProcessor(t *testing.T) {
+
+	itemssvc := &Dummy{FindResult: &FindResultDummy{Items: nil, Total: 0, Error: nil}}
+
+	b := &BatchProcessor{
+		Items:        itemssvc,
+		SpaceID:      "sp",
+		EnvID:        environments.DefaultEnvironment,
+		CollectionID: "col",
+		FindOptions: &FindOptions{
+			Regular:     true,
+			Hidden:      true,
+			Templates:   true,
+			FindOptions: *options.NewFindOptions(0, 10),
+		},
+		Filter: NewFilter("a > 5"),
+	}
+
+	var counter int
+	_, err := b.Do(context.Background(), func(batch []*Item) error { counter++; return nil })
+	require.NoError(t, err)
+	assert.Equal(t, 0, counter)
+}