s3: restore retries for minio tests

internal/backend/s3/s3_test.go

@@ -7,15 +7,18 @@ import (
 	"fmt"
 	"io"
 	"net"
+	"net/http"
 	"os"
 	"os/exec"
 	"path/filepath"
 	"testing"
 	"time"
 
+	"github.com/restic/restic/internal/backend/location"
 	"github.com/restic/restic/internal/backend/s3"
 	"github.com/restic/restic/internal/backend/test"
 	"github.com/restic/restic/internal/options"
+	"github.com/restic/restic/internal/restic"
 	rtest "github.com/restic/restic/internal/test"
 )
 
@@ -114,7 +117,18 @@ func newMinioTestSuite(t testing.TB) (*test.Suite[s3.Config], func()) {
 				return &cfg, nil
 			},
 
-			Factory: s3.NewFactory(),
+			Factory: location.NewHTTPBackendFactory("s3", s3.ParseConfig, location.NoPassword, func(ctx context.Context, cfg s3.Config, rt http.RoundTripper) (be restic.Backend, err error) {
+				for i := 0; i < 10; i++ {
+					be, err = s3.Create(ctx, cfg, rt)
+					if err != nil {
+						t.Logf("s3 open: try %d: error %v", i, err)
+						time.Sleep(500 * time.Millisecond)
+						continue
+					}
+					break
+				}
+				return be, err
+			}, s3.Open),
 		}, func() {
 			defer cancel()
 			defer cleanup()