aboutsummaryrefslogtreecommitdiffstats
path: root/helper_test.go
blob: edbe06c91a9be9df83e77592ceda678ed3e27fc8 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
/* SPDX-License-Identifier: GPL-2.0
 *
 * Copyright (C) 2017-2018 WireGuard LLC. All Rights Reserved.
 */

package main

import (
	"bytes"
	"errors"
	"git.zx2c4.com/wireguard-go/tun"
	"os"
	"testing"
)

/* Helpers for writing unit tests
 */

type DummyTUN struct {
	name    string
	mtu     int
	packets chan []byte
	events  chan tun.TUNEvent
}

func (tun *DummyTUN) File() *os.File {
	return nil
}

func (tun *DummyTUN) Name() (string, error) {
	return tun.name, nil
}

func (tun *DummyTUN) MTU() (int, error) {
	return tun.mtu, nil
}

func (tun *DummyTUN) Write(d []byte, offset int) (int, error) {
	tun.packets <- d[offset:]
	return len(d), nil
}

func (tun *DummyTUN) Close() error {
	close(tun.events)
	close(tun.packets)
	return nil
}

func (tun *DummyTUN) Events() chan tun.TUNEvent {
	return tun.events
}

func (tun *DummyTUN) Read(d []byte, offset int) (int, error) {
	t, ok := <-tun.packets
	if !ok {
		return 0, errors.New("device closed")
	}
	copy(d[offset:], t)
	return len(t), nil
}

func CreateDummyTUN(name string) (tun.TUNDevice, error) {
	var dummy DummyTUN
	dummy.mtu = 0
	dummy.packets = make(chan []byte, 100)
	dummy.events = make(chan tun.TUNEvent, 10)
	return &dummy, nil
}

func assertNil(t *testing.T, err error) {
	if err != nil {
		t.Fatal(err)
	}
}

func assertEqual(t *testing.T, a []byte, b []byte) {
	if bytes.Compare(a, b) != 0 {
		t.Fatal(a, "!=", b)
	}
}

func randDevice(t *testing.T) *Device {
	sk, err := newPrivateKey()
	if err != nil {
		t.Fatal(err)
	}
	tun, _ := CreateDummyTUN("dummy")
	logger := NewLogger(LogLevelError, "")
	device := NewDevice(tun, logger)
	device.SetPrivateKey(sk)
	return device
}