pkg/test/util.go

// Copyright Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package test

import (
	"os"
	"time"
)

// SetEnvForTest sets an environment variable for the duration of a test, then resets it once the test is complete.
func SetEnvForTest(t Failer, k, v string) {
	old := os.Getenv(k)
	if err := os.Setenv(k, v); err != nil {
		t.Fatal(err)
	}
	t.Cleanup(func() {
		if err := os.Setenv(k, old); err != nil {
			t.Fatal(err)
		}
	})
}

// SetStringForTest sets a variable for the duration of a test, then resets it once the test is complete.
func SetStringForTest(t Failer, vv *string, v string) {
	old := *vv
	*vv = v
	t.Cleanup(func() {
		*vv = old
	})
}

// SetBoolForTest sets a variable for the duration of a test, then resets it once the test is complete.
func SetBoolForTest(t Failer, vv *bool, v bool) {
	old := *vv
	*vv = v
	t.Cleanup(func() {
		*vv = old
	})
}

// SetFloatForTest sets a variable for the duration of a test, then resets it once the test is complete.
func SetFloatForTest(t Failer, vv *float64, v float64) {
	old := *vv
	*vv = v
	t.Cleanup(func() {
		*vv = old
	})
}

// SetDurationForTest sets a variable for the duration of a test, then resets it once the test is complete.
func SetDurationForTest(t Failer, vv *time.Duration, v time.Duration) {
	old := *vv
	*vv = v
	t.Cleanup(func() {
		*vv = old
	})
}