package main import ( "bytes" "testing" ) /* Helpers for writing unit tests */ type DummyTUN struct { name string mtu int packets chan []byte } func (tun *DummyTUN) Name() string { return tun.name } func (tun *DummyTUN) MTU() int { return tun.mtu } func (tun *DummyTUN) Write(d []byte) (int, error) { tun.packets <- d return len(d), nil } func (tun *DummyTUN) Read(d []byte) (int, error) { t := <-tun.packets copy(d, t) return len(t), nil } func CreateDummyTUN(name string) (TUNDevice, error) { var dummy DummyTUN dummy.mtu = 0 dummy.packets = make(chan []byte, 100) 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") device := NewDevice(tun, LogLevelError) device.SetPrivateKey(sk) return device }