psiphon-tunnel-core/psiphon/common/utils_test.go

/*
 * Copyright (c) 2014, Psiphon Inc.
 * All rights reserved.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package common

import (
	"testing"
	"time"
)

func TestMakeRandomPeriod(t *testing.T) {
	min := 1 * time.Nanosecond
	max := 10000 * time.Nanosecond

	res1, err := MakeRandomPeriod(min, max)

	if err != nil {
		t.Error("MakeRandomPeriod failed: %s", err)
	}

	if res1 < min {
		t.Error("duration should not be less than min")
	}

	if res1 > max {
		t.Error("duration should not be more than max")
	}

	res2, err := MakeRandomPeriod(min, max)

	if err != nil {
		t.Error("MakeRandomPeriod failed: %s", err)
	}

	if res1 == res2 {
		t.Error("duration should have randomness difference between calls")
	}
}