t.Fatalf("got %v; want %v", b[:n], data[:])
	}
}

func TestUnixgramZeroBytePayload(t *testing.T) {
	if !testableNetwork("unixgram") {
		t.Skip("unixgram test")
	}

	c1 := newLocalPacketListener(t, "unixgram")
	defer os.Remove(c1.LocalAddr().String())
	defer c1.Close()

	c2, err := Dial("unixgram", c1.LocalAddr().String())
	if err != nil {
		t.Fatal(err)
	}
	defer os.Remove(c2.LocalAddr().String())
	defer c2.Close()

// BUG(mikio): On Windows, methods and functions related to UnixConn
// and UnixListener don't work for "unixgram" and "unixpacket".

// UnixAddr represents the address of a Unix domain socket end point.
type UnixAddr struct {
	Name string
	Net  string
}

// Network returns the address's network name, "unix", "unixgram" or
// "unixpacket".
func (a *UnixAddr) Network() string {
	return a.Net
}

	var packetConnTests = []struct {
		net   string
		addr1 string
		addr2 string
	}{
		{"udp", "127.0.0.1:0", "127.0.0.1:0"},
		{"unixgram", testUnixAddr(t), testUnixAddr(t)},
	}

	closer := func(c PacketConn, net, addr1, addr2 string) {
		c.Close()
		switch net {
		case "unixgram":
			os.Remove(addr1)
			os.Remove(addr2)
		}
	}

	for _, tt := range packetConnTests {

	}
}

func TestUnixConnSpecificMethods(t *testing.T) {
	if !testableNetwork("unixgram") {
		t.Skip("unixgram test")
	}

	addr1, addr2, addr3 := testUnixAddr(t), testUnixAddr(t), testUnixAddr(t)

	a1, err := ResolveUnixAddr("unixgram", addr1)
	if err != nil {
		t.Fatal(err)
	}
	c1, err := DialUnix("unixgram", a1, nil)
	if err != nil {
		t.Fatal(err)
	}
	defer c1.Close()

		{saddr: "@nettest/go/unixgram/server", caddr: "@nettest/go/unixgram/client"},
	}

	for i, tt := range unixgramServerTests {
		i, tt := i, tt
		t.Run(fmt.Sprint(i), func(t *testing.T) {
			if !testableListenArgs("unixgram", tt.saddr, "") {
				t.Skipf("skipping unixgram %s<-%s test", tt.saddr, tt.caddr)
			}
			t.Logf("unixgram %s<-%s", tt.saddr, tt.caddr)

		switch runtime.GOOS {
		case "fuchsia", "hurd", "js", "nacl", "plan9", "wasip1":
			return false
		default:
			if os.Getuid() != 0 {
				return false
			}
		}
	case "unix", "unixgram":
		switch runtime.GOOS {
		case "android", "fuchsia", "hurd", "ios", "js", "nacl", "plan9", "wasip1", "windows":
			return false
		case "aix":
			return unixStrmDgramEnabled()
		}
	case "unixpacket":

		wg.Wait()
		if !reflect.DeepEqual(ln2.Addr(), addr) {
			t.Fatalf("got %#v; want %#v", ln2.Addr(), addr)
		}
	}
}

var filePacketConnTests = []struct {
	network string
}{
	{"udp"},
	{"unixgram"},
}

func TestFilePacketConn(t *testing.T) {
	switch runtime.GOOS {
	case "plan9", "windows", "js", "wasip1":
		t.Skipf("not supported on %s", runtime.GOOS)
	}

	var sotype int
	switch net {
	case "unix":
		sotype = syscall.SOCK_STREAM
	case "unixgram":
		sotype = syscall.SOCK_DGRAM
	case "unixpacket":
		sotype = syscall.SOCK_SEQPACKET
	default:
		return nil, UnknownNetworkError(net)
	}

	switch mode {
	case "dial":

	switch net {
	case "ip+nopriv":
	case "ip", "ip4", "ip6":
		switch runtime.GOOS {
		case "plan9":
			return false
		default:
			if os.Getuid() != 0 {
				return false
			}
		}
	case "unix", "unixgram":
		switch runtime.GOOS {
		case "android", "ios", "plan9", "windows":
			return false
		case "aix":
			return unixEnabledOnAIX
		}
	case "unixpacket":
		switch runtime.GOOS {

		ch <- err
		return
	}
	if peer == nil { // for connected-mode sockets
		switch c.LocalAddr().Network() {
		case "udp":
			peer, err = ResolveUDPAddr("udp", string(b[:n]))
		case "unixgram":
			peer, err = ResolveUnixAddr("unixgram", string(b[:n]))
		}
		if err != nil {
			ch <- err
			return
		}
	}
	if _, err := c.WriteTo(b[:n], peer); err != nil {
		if perr := parseWriteError(err); perr != nil {