github.com/opencontainers/umoci@v0.4.8-0.20240508124516-656e4836fb0d/pkg/testutils/random_string.go (about)

     1  /*
     2   * umoci: Umoci Modifies Open Containers' Images
     3   * Copyright (C) 2016-2020 SUSE LLC
     4   *
     5   * Licensed under the Apache License, Version 2.0 (the "License");
     6   * you may not use this file except in compliance with the License.
     7   * You may obtain a copy of the License at
     8   *
     9   *    http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  
    18  package testutils
    19  
    20  import (
    21  	"math/rand"
    22  )
    23  
    24  // RandomString returns a pseudorandom alphabetical (mixed-case) string.
    25  func RandomString(n int) string {
    26  	const alpha = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
    27  	b := make([]byte, n)
    28  	for i := range b {
    29  		b[i] = alpha[rand.Intn(len(alpha))]
    30  	}
    31  	return string(b)
    32  }