knative.dev/pkg@v0.0.0-20260602142205-ac97e43f6622/test/helpers/error.go (about)

     1  /*
     2  Copyright 2019 The Knative Authors
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  // error.go helps with error handling
    18  
    19  package helpers
    20  
    21  import (
    22  	"errors"
    23  	"strings"
    24  )
    25  
    26  // CombineErrors combines slice of errors and return a single error
    27  func CombineErrors(errs []error) error {
    28  	if len(errs) == 0 {
    29  		return nil
    30  	}
    31  	msgs := make([]string, 0)
    32  	for _, err := range errs {
    33  		if err != nil {
    34  			msgs = append(msgs, err.Error())
    35  		}
    36  	}
    37  	if len(msgs) == 0 {
    38  		return nil
    39  	}
    40  	return errors.New(strings.Join(msgs, "\n"))
    41  }