github.com/cloudfoundry/libcfbuildpack@v1.91.23/internal/replace_args.go (about)

     1  /*
     2   * Copyright 2018-2020 the original author or 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   *      https://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  package internal
    18  
    19  import (
    20  	"os"
    21  	"testing"
    22  )
    23  
    24  // ReplaceArgs replaces the current command line arguments (os.Args) with a new collection of values.  Returns a
    25  // function suitable for use with defer in order to reset the previous values
    26  //
    27  //  defer ReplaceArgs(t, "alpha")()
    28  func ReplaceArgs(t *testing.T, args ...string) func() {
    29  	t.Helper()
    30  
    31  	previous := os.Args
    32  	os.Args = args
    33  
    34  	return func() { os.Args = previous }
    35  }