func SetForTest[T any](t Failer, vv *T, v T) {
	old := *vv
	*vv = v
	t.Cleanup(func() {
		*vv = old
	})
}

// 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, oldset := os.LookupEnv(k)
	if err := os.Setenv(k, v); err != nil {
		t.Fatal(err)
	}
	t.Cleanup(func() {
		if oldset {

	"istio.io/istio/pkg/test/util/assert"
)

func TestBind(t *testing.T) {
	type Options struct {
		A, B, C string
		Env     string
		Bool    bool
	}
	opts := Options{
		B: "b-def",
	}
	test.SetEnvForTest(t, "TEST_ENV", "from-env")
	fs := pflag.NewFlagSet("test", pflag.ContinueOnError)
	Bind(fs, "a", "", "desc", &opts.A)
	Bind(fs, "bool", "", "desc", &opts.Bool)
	BindEnv(fs, "test-env", "", "desc", &opts.Env)

			setup: func(t test.Failer) {
				test.SetEnvForTest(t, features.EnableNativeSidecars.Name, "true")
			},
		},
		{
			in:   "gateway.yaml",
			want: "gateway.yaml.injected",
		},
		{
			in:   "gateway.yaml",
			want: "gateway.yaml.injected",
			setup: func(t test.Failer) {
				test.SetEnvForTest(t, features.EnableNativeSidecars.Name, "true")
			},
		},
		{