// Copyright 2015 The Chihaya Authors. All rights reserved.
// Use of this source code is governed by the BSD 2-Clause license,
// which can be found in the LICENSE file.

package udp

import (
	"bytes"
	"net"
	"testing"
)

func TestInitReturnsNoError(t *testing.T) {
	if err := InitConnectionIDEncryption(); err != nil {
		t.Error("InitConnectionIDEncryption returned", err)
	}
}

func testGenerateConnectionID(t *testing.T, ip net.IP) {
	InitConnectionIDEncryption()

	id1 := GenerateConnectionID(ip)
	id2 := GenerateConnectionID(ip)

	if !bytes.Equal(id1, id2) {
		t.Errorf("Connection ID mismatch: %x != %x", id1, id2)
	}

	if len(id1) != 8 {
		t.Errorf("Connection ID had length: %d != 8", len(id1))
	}

	if bytes.Count(id1, []byte{0}) == 8 {
		t.Errorf("Connection ID was 0")
	}
}

func TestGenerateConnectionIDIPv4(t *testing.T) {
	testGenerateConnectionID(t, net.ParseIP("192.168.1.123").To4())
}

func TestGenerateConnectionIDIPv6(t *testing.T) {
	testGenerateConnectionID(t, net.ParseIP("1:2:3:4::5:6"))
}