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encoding_test.go
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package p9p
import (
"bytes"
"errors"
"reflect"
"testing"
"time"
)
func TestEncodeDecode(t *testing.T) {
codec := NewCodec()
for _, testcase := range []struct {
description string
target interface{}
marshaled []byte
}{
{
description: "uint8",
target: uint8('U'),
marshaled: []byte{0x55},
},
{
description: "uint16",
target: uint16(0x5544),
marshaled: []byte{0x44, 0x55},
},
{
description: "string",
target: "asdf",
marshaled: []byte{0x4, 0x0, 0x61, 0x73, 0x64, 0x66},
},
{
description: "StringSlice",
target: []string{"asdf", "qwer", "zxcv"},
marshaled: []byte{
0x3, 0x0, // len(target)
0x4, 0x0, 0x61, 0x73, 0x64, 0x66,
0x4, 0x0, 0x71, 0x77, 0x65, 0x72,
0x4, 0x0, 0x7a, 0x78, 0x63, 0x76},
},
{
description: "Qid",
target: Qid{
Type: QTDIR,
Version: 0x10203040,
Path: 0x1020304050607080},
marshaled: []byte{
byte(QTDIR), // qtype
0x40, 0x30, 0x20, 0x10, // version
0x80, 0x70, 0x60, 0x50, 0x40, 0x30, 0x20, 0x10, // path
},
},
// Dir
{
description: "TversionFcall",
target: &Fcall{
Type: Tversion,
Tag: 2255,
Message: MessageTversion{
MSize: uint32(1024),
Version: "9PTEST",
},
},
marshaled: []byte{
0x64, 0xcf, 0x8, 0x0, 0x4, 0x0, 0x0,
0x6, 0x0, 0x39, 0x50, 0x54, 0x45, 0x53, 0x54},
},
{
description: "RversionFcall",
target: &Fcall{
Type: Rversion,
Tag: 2255,
Message: MessageRversion{
MSize: uint32(1024),
Version: "9PTEST",
},
},
marshaled: []byte{
0x65, 0xcf, 0x8, 0x0, 0x4, 0x0, 0x0,
0x6, 0x0, 0x39, 0x50, 0x54, 0x45, 0x53, 0x54},
},
{
description: "TwalkFcall",
target: &Fcall{
Type: Twalk,
Tag: 5666,
Message: MessageTwalk{
Fid: 1010,
Newfid: 1011,
Wnames: []string{"a", "b", "c"},
},
},
marshaled: []byte{
0x6e, 0x22, 0x16, 0xf2, 0x3, 0x0, 0x0, 0xf3, 0x3, 0x0, 0x0,
0x3, 0x0, // len(wnames)
0x1, 0x0, 0x61, // "a"
0x1, 0x0, 0x62, // "b"
0x1, 0x0, 0x63}, // "c"
},
{
description: "RwalkFcall",
target: &Fcall{
Type: Rwalk,
Tag: 5556,
Message: MessageRwalk{
Qids: []Qid{
Qid{
Type: QTDIR,
Path: 1111,
Version: 11112,
},
Qid{Type: QTFILE,
Version: 1112,
Path: 11114},
},
},
},
marshaled: []byte{
0x6f, 0xb4, 0x15,
0x2, 0x0,
0x80, 0x68, 0x2b, 0x0, 0x0, 0x57, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x58, 0x4, 0x0, 0x0, 0x6a, 0x2b, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
},
{
description: "TopenFcall",
target: &Fcall{
Type: Topen,
Tag: 2256,
Message: MessageTopen{
Fid: Fid(285212672),
Mode: ORDWR,
},
},
marshaled: []byte{
0x70, 0xd0, 0x8, 0x00, 0x0, 0x0, 0x11, 0x02},
},
{
description: "RopenFcall",
target: &Fcall{
Type: Ropen,
Tag: 2257,
Message: MessageRopen{
Qid{Type: QTFILE,
Version: 1112,
Path: 11114},
7777,
},
},
marshaled: []byte{
0x71, 0xd1, 0x8,
0x0, 0x58, 0x4, 0x0, 0x0, 0x6a, 0x2b, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x61, 0x1e, 0x00, 0x00},
},
{
description: "EmptyRreadFcall",
target: &Fcall{
Type: Rread,
Tag: 5556,
Message: MessageRread{},
},
marshaled: []byte{
0x75, 0xb4, 0x15,
0x0, 0x0, 0x0, 0x0},
},
{
description: "EmptyTwriteFcall",
target: &Fcall{
Type: Twrite,
Tag: 5556,
Message: MessageTwrite{},
},
marshaled: []byte{
byte(Twrite), 0xb4, 0x15,
0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0},
},
{
description: "RreadFcall",
target: &Fcall{
Type: Rread,
Tag: 5556,
Message: MessageRread{
Data: []byte("a lot of byte data"),
},
},
marshaled: []byte{
0x75, 0xb4, 0x15,
0x12, 0x0, 0x0, 0x0,
0x61, 0x20, 0x6c, 0x6f, 0x74, 0x20, 0x6f, 0x66, 0x20, 0x62, 0x79, 0x74, 0x65, 0x20, 0x64, 0x61, 0x74, 0x61},
},
{
description: "RstatFcall",
target: &Fcall{
Type: Rstat,
Tag: 5556,
Message: MessageRstat{
Stat: Dir{
Type: ^uint16(0),
Dev: ^uint32(0),
Qid: Qid{
Type: QTDIR,
Version: ^uint32(0),
Path: ^uint64(0),
},
Mode: DMDIR | DMREAD,
AccessTime: time.Date(2006, 01, 02, 03, 04, 05, 0, time.UTC),
ModTime: time.Date(2006, 01, 02, 03, 04, 05, 0, time.UTC),
Length: ^uint64(0),
Name: "somedir",
UID: "uid",
GID: "gid",
MUID: "muid",
},
},
},
marshaled: []byte{
0x7d, 0xb4, 0x15,
0x42, 0x0, // TODO(stevvooe): Compute this Dir size. see
0x40, 0x0, // TODO(stevvooe): https://9p.io/magic/man2html/5/stat
0xff, 0xff, // type
0xff, 0xff, 0xff, 0xff, // dev
0x80, 0xff, 0xff, 0xff, 0xff, // qid.type, qid.version
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // qid.path
0x4, 0x0, 0x0, 0x80, // mode
0x25, 0x98, 0xb8, 0x43, // atime
0x25, 0x98, 0xb8, 0x43, // mtime
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // length
0x7, 0x0, 0x73, 0x6f, 0x6d, 0x65, 0x64, 0x69, 0x72,
0x3, 0x0, 0x75, 0x69, 0x64, // uid
0x3, 0x0, 0x67, 0x69, 0x64, // gid
0x4, 0x0, 0x6d, 0x75, 0x69, 0x64}, // muid
},
{
description: "TwstatFcall",
target: &Fcall{
Type: Twstat,
Tag: 5556,
Message: MessageTwstat{
Fid: Fid(285212672),
Stat: Dir{
Type: ^uint16(0),
Dev: ^uint32(0),
Qid: Qid{
Type: QTDIR,
Version: ^uint32(0),
Path: ^uint64(0),
},
Mode: DMDIR | DMREAD,
AccessTime: time.Date(2006, 01, 02, 03, 04, 05, 0, time.UTC),
ModTime: time.Date(2006, 01, 02, 03, 04, 05, 0, time.UTC),
Length: ^uint64(0),
Name: "somedir",
UID: "uid",
GID: "gid",
MUID: "muid",
},
},
},
marshaled: []byte{
0x7e, 0xb4, 0x15,
0x00, 0x0, 0x0, 0x11,
0x42, 0x0, // TODO(stevvooe): Compute this Dir size. see
0x40, 0x0, // TODO(stevvooe): https://9p.io/magic/man2html/5/stat
0xff, 0xff, // type
0xff, 0xff, 0xff, 0xff, // dev
0x80, 0xff, 0xff, 0xff, 0xff, // qid.type, qid.version
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // qid.path
0x4, 0x0, 0x0, 0x80, // mode
0x25, 0x98, 0xb8, 0x43, // atime
0x25, 0x98, 0xb8, 0x43, // mtime
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // length
0x7, 0x0, 0x73, 0x6f, 0x6d, 0x65, 0x64, 0x69, 0x72,
0x3, 0x0, 0x75, 0x69, 0x64, // uid
0x3, 0x0, 0x67, 0x69, 0x64, // gid
0x4, 0x0, 0x6d, 0x75, 0x69, 0x64}, // muid
},
{
description: "DirSlice",
target: []Dir{
{
Type: uint16(0),
Dev: uint32(0),
Qid: Qid{
Type: QTDIR,
Version: uint32(0),
Path: ^uint64(0),
},
Mode: DMDIR | DMREAD,
AccessTime: time.Date(2006, 01, 02, 03, 04, 05, 0, time.UTC),
ModTime: time.Date(2006, 01, 02, 03, 04, 05, 0, time.UTC),
Length: 0x88,
Name: ".",
UID: "501",
GID: "20",
MUID: "none",
},
{
Type: uint16(0),
Dev: uint32(0),
Qid: Qid{
Type: QTDIR,
Version: uint32(0),
Path: ^uint64(0),
},
Mode: DMDIR | DMREAD,
AccessTime: time.Date(2006, 01, 02, 03, 04, 05, 0, time.UTC),
ModTime: time.Date(2006, 01, 02, 03, 04, 05, 0, time.UTC),
Length: 0x63e,
Name: "..",
UID: "501",
GID: "20",
MUID: "none",
},
{
Type: uint16(0),
Dev: uint32(0),
Qid: Qid{
Type: QTDIR,
Version: uint32(0),
Path: ^uint64(0),
},
Mode: DMDIR | DMREAD,
AccessTime: time.Date(2006, 01, 02, 03, 04, 05, 0, time.UTC),
ModTime: time.Date(2006, 01, 02, 03, 04, 05, 0, time.UTC),
Length: 0x44,
Name: "hello",
UID: "501",
GID: "20",
MUID: "none",
},
{
Type: uint16(0),
Dev: uint32(0),
Qid: Qid{
Type: QTDIR,
Version: uint32(0),
Path: ^uint64(0),
},
Mode: DMDIR | DMREAD,
AccessTime: time.Date(2006, 01, 02, 03, 04, 05, 0, time.UTC),
ModTime: time.Date(2006, 01, 02, 03, 04, 05, 0, time.UTC),
Length: 0x44,
Name: "there",
UID: "501",
GID: "20",
MUID: "none",
},
},
marshaled: []byte{
0x39, 0x0, // size
0x0, 0x0, // type
0x0, 0x0, 0x0, 0x0, // dev
0x80, // qid.type == QTDIR
0x0, 0x0, 0x0, 0x0, // qid.vers
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // qid.path
0x4, 0x0, 0x0, 0x80, // mode
0x25, 0x98, 0xb8, 0x43, // atime
0x25, 0x98, 0xb8, 0x43, // mtime
0x88, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, // length
0x1, 0x0,
0x2e, // .
0x3, 0x0,
0x35, 0x30, 0x31, // 501
0x2, 0x0,
0x32, 0x30, // 20
0x4, 0x0,
0x6e, 0x6f, 0x6e, 0x65, // none
0x3a, 0x0,
0x0, 0x0, // type
0x0, 0x0, 0x0, 0x0, // dev
0x80, // qid.type == QTDIR
0x0, 0x0, 0x0, 0x0, // qid.vers
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // qid.path
0x4, 0x0, 0x0, 0x80, // mode
0x25, 0x98, 0xb8, 0x43, // atime
0x25, 0x98, 0xb8, 0x43, // mtime
0x3e, 0x6, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, // length
0x2, 0x0,
0x2e, 0x2e, // ..
0x3, 0x0,
0x35, 0x30, 0x31, // 501
0x2, 0x0,
0x32, 0x30, // 20
0x4, 0x0,
0x6e, 0x6f, 0x6e, 0x65, // none
0x3d, 0x0,
0x0, 0x0, // type
0x0, 0x0, 0x0, 0x0, // dev
0x80, // qid.type == QTDIR
0x0, 0x0, 0x0, 0x0, // qid.vers
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // qid.Path
0x4, 0x0, 0x0, 0x80, // mode
0x25, 0x98, 0xb8, 0x43, // atime
0x25, 0x98, 0xb8, 0x43, // mtime
0x44, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, // length
0x5, 0x0,
0x68, 0x65, 0x6c, 0x6c, 0x6f, // hello
0x3, 0x0,
0x35, 0x30, 0x31, // 501
0x2, 0x0,
0x32, 0x30, // 20
0x4, 0x0,
0x6e, 0x6f, 0x6e, 0x65, // none
0x3d, 0x0,
0x0, 0x0, // type
0x0, 0x0, 0x0, 0x0, // dev
0x80, // qid.type == QTDIR
0x0, 0x0, 0x0, 0x0, //qid.vers
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // qid.path
0x4, 0x0, 0x0, 0x80, // mode
0x25, 0x98, 0xb8, 0x43, // atime
0x25, 0x98, 0xb8, 0x43, // mtime
0x44, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, // length
0x5, 0x0,
0x74, 0x68, 0x65, 0x72, 0x65, // there
0x3, 0x0,
0x35, 0x30, 0x31, // 501
0x2, 0x0,
0x32, 0x30, // 20
0x4, 0x0,
0x6e, 0x6f, 0x6e, 0x65, // none
},
},
{
description: "RerrorFcall",
target: newErrorFcall(5556, errors.New("A serious error")),
marshaled: []byte{
0x6b, // Rerror
0xb4, 0x15, // Tag
0xf, 0x0, // String size.
0x41, 0x20, 0x73, 0x65, 0x72, 0x69, 0x6f, 0x75, 0x73, 0x20, 0x65, 0x72, 0x72, 0x6f, 0x72},
},
} {
t.Run(testcase.description, func(t *testing.T) {
p, err := codec.Marshal(testcase.target)
if err != nil {
t.Fatalf("error writing fcall: %v", err)
}
if !bytes.Equal(p, testcase.marshaled) {
t.Fatalf("unexpected bytes for fcall: \n%#v != \n%#v", p, testcase.marshaled)
}
if size9p(testcase.target) == 0 {
t.Fatalf("size of target should never be zero")
}
// check that size9p is working correctly
if int(size9p(testcase.target)) != len(testcase.marshaled) {
t.Fatalf("size not correct: %v != %v", int(size9p(testcase.target)), len(testcase.marshaled))
}
var v interface{}
targetType := reflect.TypeOf(testcase.target)
if targetType.Kind() == reflect.Ptr {
v = reflect.New(targetType.Elem()).Interface()
} else {
v = reflect.New(targetType).Interface()
}
if err := codec.Unmarshal(p, v); err != nil {
t.Fatalf("error reading: %v", err)
}
if targetType.Kind() != reflect.Ptr {
v = reflect.Indirect(reflect.ValueOf(v)).Interface()
}
if !reflect.DeepEqual(v, testcase.target) {
t.Fatalf("not equal: %v != %v (\n%#v\n%#v\n)",
v, testcase.target,
v, testcase.target)
}
})
}
}