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//go:build !go1.17
// +build !go1.17
package testutil
import (
"os"
"testing"
)
// Based on https://github.com/frankban/quicktest/blob/577841610793d24f99e31cc2c0ef3a541fefd7c7/patch.go#L34-L64
// Licensed under the MIT license
// Copyright (c) 2017 Canonical Ltd.
// Setenv sets an environment variable to a temporary value for the
// duration of the test.
//
// At the end of the test (see "Deferred execution" in the package docs), the
// environment variable is returned to its original value.
func Setenv(t *testing.T, name, val string) {
setenv(t, name, val, true)
}
// setenv sets or unsets an environment variable to a temporary value for the
// duration of the test
func setenv(t *testing.T, name, val string, valOK bool) {
oldVal, oldOK := os.LookupEnv(name)
if valOK {
os.Setenv(name, val)
} else {
os.Unsetenv(name)
}
t.Cleanup(func() {
if oldOK {
os.Setenv(name, oldVal)
} else {
os.Unsetenv(name)
}
})
}
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