Resource permissions: Make sure that list response includes the next page token (#111446)

make sure that list iterator returns a next page token

pkg/registry/apis/iam/resourcepermission/storage_backend.go

@@ -95,7 +95,7 @@ func (s *ResourcePermSqlBackend) ListIterator(ctx context.Context, req *resource
 	}
 
 	pagination := &common.Pagination{
-		Limit:    limit,
+		Limit:    limit + 1, // fetch one more to determine if there is a next page
 		Continue: token.offset,
 	}
 

pkg/registry/apis/iam/resourcepermission/storage_backend_test.go

@@ -580,6 +580,9 @@ func TestIntegration_ResourcePermSqlBackend_ListIterator(t *testing.T) {
 				continueToken = it.ContinueToken()
 				require.NoError(t, json.Unmarshal(it.Value(), &perm))
 				results = append(results, perm.Name)
+				if len(results) >= int(req.Limit) {
+					return nil
+				}
 			}
 			return nil
 		})
@@ -591,6 +594,9 @@ func TestIntegration_ResourcePermSqlBackend_ListIterator(t *testing.T) {
 				continueToken = it.ContinueToken()
 				require.NoError(t, json.Unmarshal(it.Value(), &perm))
 				results = append(results, perm.Name)
+				if len(results) >= int(req.Limit) {
+					return nil
+				}
 			}
 			return nil
 		})
@@ -603,6 +609,9 @@ func TestIntegration_ResourcePermSqlBackend_ListIterator(t *testing.T) {
 				continueToken = it.ContinueToken()
 				require.NoError(t, json.Unmarshal(it.Value(), &perm))
 				results = append(results, perm.Name)
+				if len(results) >= int(req.Limit) {
+					return nil
+				}
 			}
 			return nil
 		})