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gsm_test.go
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// SPDX-License-Identifier: MIT
//
// Copyright © 2018 Kent Gibson <[email protected]>.
//
// Test suite for GSM module.
//
// Note that these tests provide a mockModem which does not attempt to emulate
// a serial modem, but which provides responses required to exercise gsm.go So,
// while the commands may follow the structure of the AT protocol they most
// certainly are not AT commands - just patterns that elicit the behaviour
// required for the test.
package gsm_test
import (
"encoding/hex"
"fmt"
"io"
"strconv"
"testing"
"time"
"github.com/pkg/errors"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/warthog618/modem/at"
"github.com/warthog618/modem/gsm"
"github.com/warthog618/modem/trace"
"github.com/warthog618/sms"
"github.com/warthog618/sms/encoding/pdumode"
"github.com/warthog618/sms/encoding/semioctet"
"github.com/warthog618/sms/encoding/tpdu"
"github.com/warthog618/sms/encoding/ucs2"
)
var debug = false // set to true to enable tracing of the flow to the mockModem.
const (
sub = "\x1a"
esc = "\x1b"
)
func TestNew(t *testing.T) {
mm := mockModem{cmdSet: nil, echo: false, r: make(chan []byte, 10)}
defer teardownModem(&mm)
a := at.New(&mm)
patterns := []struct {
name string
options []gsm.Option
success bool
}{
{
"default",
nil,
true,
},
{
"WithPDUMode",
[]gsm.Option{gsm.WithPDUMode},
true,
},
{
"WithTextMode",
[]gsm.Option{gsm.WithTextMode},
true,
},
{
"WithNumericErrors",
[]gsm.Option{gsm.WithNumericErrors},
true,
},
{
"WithTextualErrors",
[]gsm.Option{gsm.WithTextualErrors},
true,
},
}
for _, p := range patterns {
f := func(t *testing.T) {
g := gsm.New(a, p.options...)
if p.success {
assert.NotNil(t, g)
} else {
assert.Nil(t, g)
}
}
t.Run(p.name, f)
}
}
func TestInit(t *testing.T) {
// mocked
cmdSet := map[string][]string{
// for init (AT)
esc + "\r\n\r\n": {"\r\n"},
"ATZ\r\n": {"OK\r\n"},
"ATE0\r\n": {"OK\r\n"},
// for init (GSM)
"AT+CMEE=2\r\n": {"OK\r\n"},
"AT+CMEE=1\r\n": {"OK\r\n"},
"AT+CMGF=1\r\n": {"OK\r\n"},
"AT+GCAP\r\n": {"+GCAP: +CGSM,+DS,+ES\r\n", "OK\r\n"},
}
patterns := []struct {
name string
options []at.InitOption
residual []byte
key string
value []string
gopts []gsm.Option
err error
}{
{
"vanilla",
nil,
nil,
"",
nil,
[]gsm.Option{gsm.WithTextMode},
nil,
},
{
"residual OKs",
nil,
[]byte("\r\nOK\r\nOK\r\n"),
"",
nil,
[]gsm.Option{gsm.WithTextMode},
nil,
},
{
"residual ERRORs",
nil,
[]byte("\r\nERROR\r\nERROR\r\n"),
"",
nil,
[]gsm.Option{gsm.WithTextMode},
nil,
},
{
"cruft",
nil,
nil,
"AT+GCAP\r\n",
[]string{"cruft\r\n", "+GCAP: +CGSM,+DS,+ES\r\n", "OK\r\n"},
[]gsm.Option{gsm.WithTextMode},
nil,
},
{
"CMEE textual error",
nil,
nil,
"AT+CMEE=2\r\n",
[]string{"ERROR\r\n"},
[]gsm.Option{gsm.WithTextMode},
at.ErrError,
},
{
"CMEE numeric error",
nil,
nil,
"AT+CMEE=1\r\n",
[]string{"ERROR\r\n"},
[]gsm.Option{gsm.WithTextMode, gsm.WithNumericErrors},
at.ErrError,
},
{
"GCAP error",
nil,
nil,
"AT+GCAP\r\n",
[]string{"ERROR\r\n"},
[]gsm.Option{gsm.WithTextMode},
at.ErrError,
},
{
"not GSM capable",
nil,
nil,
"AT+GCAP\r\n",
[]string{"+GCAP: +DS,+ES\r\n", "OK\r\n"},
[]gsm.Option{gsm.WithTextMode},
gsm.ErrNotGSMCapable,
},
{
"AT init failure",
nil,
nil,
"ATZ\r\n",
[]string{"ERROR\r\n"},
[]gsm.Option{gsm.WithTextMode},
fmt.Errorf("ATZ returned error: %w", at.ErrError),
},
{
"timeout",
[]at.InitOption{at.WithTimeout(0)},
nil,
"",
nil,
[]gsm.Option{gsm.WithPDUMode},
at.ErrDeadlineExceeded,
},
{
"unsupported PDU mode",
nil,
nil,
"",
nil,
[]gsm.Option{gsm.WithPDUMode},
at.ErrError,
},
{
"PDU mode",
nil,
nil,
"AT+CMGF=0\r\n",
[]string{"OK\r\n"},
[]gsm.Option{gsm.WithPDUMode},
nil,
},
}
for _, p := range patterns {
f := func(t *testing.T) {
mm := mockModem{
cmdSet: cmdSet,
echo: false,
r: make(chan []byte, 10),
readDelay: time.Millisecond,
}
defer teardownModem(&mm)
a := at.New(&mm)
g := gsm.New(a, p.gopts...)
require.NotNil(t, g)
var oldvalue []string
if p.residual != nil {
mm.r <- p.residual
}
if p.key != "" {
oldvalue = cmdSet[p.key]
cmdSet[p.key] = p.value
}
err := g.Init(p.options...)
if oldvalue != nil {
cmdSet[p.key] = oldvalue
}
assert.Equal(t, p.err, err)
}
t.Run(p.name, f)
}
}
func TestSendShortMessage(t *testing.T) {
// mocked
cmdSet := map[string][]string{
"AT+CMGS=\"+123456789\"\r": {"\n>"},
"AT+CMGS=23\r": {"\n>"},
"test message" + sub: {"\r\n", "+CMGS: 42\r\n", "\r\nOK\r\n"},
"cruft test message" + sub: {"\r\n", "pad\r\n", "+CMGS: 43\r\n", "\r\nOK\r\n"},
"000101099121436587f900000cf4f29c0e6a97e7f3f0b90c" + sub: {"\r\n", "+CMGS: 44\r\n", "\r\nOK\r\n"},
"malformed test message" + sub: {"\r\n", "pad\r\n", "\r\nOK\r\n"},
}
patterns := []struct {
name string
options []at.CommandOption
goptions []gsm.Option
number string
message string
err error
mr string
}{
{
"ok",
nil,
[]gsm.Option{gsm.WithTextMode},
"+123456789",
"test message",
nil,
"42",
},
{
"error",
nil,
[]gsm.Option{gsm.WithTextMode},
"+1234567890",
"test message",
at.ErrError,
"",
},
{
"cruft",
nil,
[]gsm.Option{gsm.WithTextMode},
"+123456789",
"cruft test message",
nil,
"43",
},
{
"malformed",
nil,
[]gsm.Option{gsm.WithTextMode},
"+123456789",
"malformed test message",
gsm.ErrMalformedResponse,
"",
},
{
"timeout",
[]at.CommandOption{at.WithTimeout(0)},
nil,
"+123456789",
"test message",
at.ErrDeadlineExceeded,
"",
},
{
"pduMode",
nil,
[]gsm.Option{gsm.WithPDUMode},
"+123456789",
"test message",
nil,
"44",
},
{
"overlength",
nil,
nil,
"+123456789",
"a very long test message that will not fit within one SMS PDU as it is just too long for one PDU even with GSM encoding, though you can fit more in one PDU than you may initially expect",
gsm.ErrOverlength,
"",
},
{
"encode error",
nil,
[]gsm.Option{
gsm.WithEncoderOption(sms.WithTemplateOption(tpdu.DCS(0x80))),
},
"+123456789",
"test message",
sms.ErrDcsConflict,
"",
},
{
"marshal error",
nil,
[]gsm.Option{gsm.WithPDUMode, gsm.WithEncoderOption(sms.AsUCS2)},
"+123456789",
"an odd length string!",
tpdu.EncodeError("SmsSubmit.ud.sm", tpdu.ErrOddUCS2Length),
"",
},
}
for _, p := range patterns {
f := func(t *testing.T) {
g, mm := setupModem(t, cmdSet, p.goptions...)
defer teardownModem(mm)
mr, err := g.SendShortMessage(p.number, p.message, p.options...)
assert.Equal(t, p.err, err)
assert.Equal(t, p.mr, mr)
}
t.Run(p.name, f)
}
}
func TestSendLongMessage(t *testing.T) {
// mocked
cmdSet := map[string][]string{
"AT+CMGS=23\r": {"\n>"},
"AT+CMGS=152\r": {"\n>"},
"AT+CMGS=47\r": {"\n>"},
"AT+CMGS=32\r": {"\r\n", "pad\r\n", "\r\nOK\r\n"},
"000101099121436587f900000cf4f29c0e6a97e7f3f0b90c" + sub: {"\r\n", "+CMGS: 42\r\n", "\r\nOK\r\n"},
"004101099121436587f90000a0050003010201c2207b599e07b1dfee33885e9ed341edf27c1e3e97417474980ebaa7d96c90fb4d0799d374d03d4d47a7dda0b7bb0c9a36a72028b10a0acf41693a283d07a9eb733a88fe7e83d86ff719647ecb416f771904255641657bd90dbaa7e968d071da0495dde33739ed3eb34074f4bb7e4683f2ef3a681c7683cc693aa8fd9697416937e8ed2e83a0" + sub: {"\r\n", "+CMGS: 43\r\n", "\r\nOK\r\n"},
"004102099121436587f90000270500030102028855101d1d7683f2ef3aa81dce83d2ee343d1d66b3f3a0321e5e1ed301" + sub: {"\r\n", "+CMGS: 44\r\n", "\r\nOK\r\n"},
}
patterns := []struct {
name string
options []at.CommandOption
goptions []gsm.Option
number string
message string
err error
mr []string
}{
{
"text mode",
nil,
[]gsm.Option{gsm.WithTextMode},
"+123456789",
"test message",
gsm.ErrWrongMode,
nil,
},
{
"error",
nil,
nil,
"+1234567890",
"test message",
at.ErrError,
nil,
},
{
"malformed",
nil,
nil,
"+123456789",
"malformed test message",
gsm.ErrMalformedResponse,
nil,
},
{
"timeout",
[]at.CommandOption{at.WithTimeout(0)},
nil,
"+123456789",
"test message",
at.ErrDeadlineExceeded,
nil,
},
{
"one pdu",
nil,
nil,
"+123456789",
"test message",
nil,
[]string{"42"},
},
{
"two pdu",
nil,
nil,
"+123456789",
"a very long test message that will not fit within one SMS PDU as it is just too long for one PDU even with GSM encoding, though you can fit more in one PDU than you may initially expect",
nil,
[]string{"43", "44"},
},
{
"encode error",
nil,
[]gsm.Option{
gsm.WithPDUMode,
gsm.WithEncoderOption(sms.WithTemplateOption(tpdu.DCS(0x80))),
},
"+123456789",
"test message",
sms.ErrDcsConflict,
nil,
},
{
"marshal error",
nil,
[]gsm.Option{gsm.WithEncoderOption(sms.AsUCS2)},
"+123456789",
"an odd length string!",
tpdu.EncodeError("SmsSubmit.ud.sm", tpdu.ErrOddUCS2Length),
nil,
},
}
for _, p := range patterns {
f := func(t *testing.T) {
g, mm := setupModem(t, cmdSet, p.goptions...)
defer teardownModem(mm)
mr, err := g.SendLongMessage(p.number, p.message, p.options...)
assert.Equal(t, p.err, err)
assert.Equal(t, p.mr, mr)
}
t.Run(p.name, f)
}
}
func TestSendPDU(t *testing.T) {
// mocked
cmdSet := map[string][]string{
"AT+CMGS=6\r": {"\n>"},
"00010203040506" + sub: {"\r\n", "+CMGS: 42\r\n", "\r\nOK\r\n"},
"00110203040506" + sub: {"\r\n", "pad\r\n", "+CMGS: 43\r\n", "\r\nOK\r\n"},
"00210203040506" + sub: {"\r\n", "pad\r\n", "\r\nOK\r\n"},
}
patterns := []struct {
name string
options []at.CommandOption
tpdu []byte
err error
mr string
}{
{
"ok",
nil,
[]byte{1, 2, 3, 4, 5, 6},
nil,
"42",
},
{
"error",
nil,
[]byte{1},
at.ErrError,
"",
},
{
"cruft",
nil,
[]byte{0x11, 2, 3, 4, 5, 6},
nil,
"43",
},
{
"malformed",
nil,
[]byte{0x21, 2, 3, 4, 5, 6},
gsm.ErrMalformedResponse,
"",
},
{
"timeout",
[]at.CommandOption{at.WithTimeout(0)},
[]byte{1, 2, 3, 4, 5, 6},
at.ErrDeadlineExceeded,
"",
},
}
g, mm := setupModem(t, cmdSet, gsm.WithPDUMode)
defer teardownModem(mm)
for _, p := range patterns {
f := func(t *testing.T) {
mr, err := g.SendPDU(p.tpdu, p.options...)
assert.Equal(t, p.err, err)
assert.Equal(t, p.mr, mr)
}
t.Run(p.name, f)
}
// wrong mode
g, mm = setupModem(t, cmdSet, gsm.WithTextMode)
defer teardownModem(mm)
p := patterns[0]
omr, oerr := g.SendPDU(p.tpdu)
assert.Equal(t, gsm.ErrWrongMode, oerr)
assert.Equal(t, "", omr)
}
func TestStartMessageRx(t *testing.T) {
cmdSet := map[string][]string{
"AT+CNMA\r\n": {"\r\nOK\r\n"},
}
g, mm := setupModem(t, cmdSet, gsm.WithTextMode)
teardownModem(mm)
msgChan := make(chan gsm.Message, 3)
errChan := make(chan error, 3)
mh := func(msg gsm.Message) {
msgChan <- msg
}
eh := func(err error) {
errChan <- err
}
// wrong mode
err := g.StartMessageRx(mh, eh)
require.Equal(t, gsm.ErrWrongMode, err)
g, mm = setupModem(t, cmdSet)
defer teardownModem(mm)
// fails CNMA
err = g.StartMessageRx(mh, eh)
require.Equal(t, at.ErrError, err)
cmdSet["AT+CNMI=1,2,0,0,0\r\n"] = []string{"\r\nOK\r\n"}
cmdSet["AT+CSMS=1\r\n"] = []string{"\r\nOK\r\n"}
// pass
err = g.StartMessageRx(mh, eh)
require.Nil(t, err)
// already exists
err = g.StartMessageRx(mh, eh)
require.Equal(t, at.ErrIndicationExists, err)
// CMT patterns to exercise cmtHandler
patterns := []struct {
rx string
msg gsm.Message
err error
}{
{
"+CMT: ,24\r\n00040B911234567890F000000250100173832305C8329BFD06\r\n",
gsm.Message{
Number: "+21436587090",
Message: "Hello",
SCTS: tpdu.Timestamp{
Time: time.Date(2020, time.May, 1, 10, 37, 38, 0, time.FixedZone("any", 8*3600))},
},
nil,
},
{
"+CMT: ,2X\r\n00040B911234567JUNK000000250100173832305C8329BFD06\r\n",
gsm.Message{Message: "no message received"},
gsm.ErrUnmarshal{
Info: []string{
"+CMT: ,2X",
"00040B911234567JUNK000000250100173832305C8329BFD06",
},
Err: &strconv.NumError{Func: "Atoi", Num: "2X", Err: strconv.ErrSyntax},
},
},
{
"+CMT: ,27\r\n004400000000101010000000000f050003030206906174181d468701\r\n",
gsm.Message{Message: "no message received"},
gsm.ErrCollect{
TPDU: tpdu.TPDU{
FirstOctet: 0x44,
SCTS: tpdu.Timestamp{
Time: time.Date(2001, time.January, 1, 0, 0, 0, 0, time.UTC)},
UDH: tpdu.UserDataHeader{
tpdu.InformationElement{ID: 0, Data: []byte{3, 2, 6}},
},
UD: []byte("Hahahaha"),
},
Err: sms.ErrReassemblyInconsistency,
},
},
{
"+CMT: ,19\r\n0004000000081010100000000006d83dde01d83d\r\n",
gsm.Message{Message: "no message received"},
gsm.ErrDecode{
TPDUs: []*tpdu.TPDU{
{
FirstOctet: 4,
DCS: 0x08,
SCTS: tpdu.Timestamp{
Time: time.Date(2001, time.January, 1, 0, 0, 0, 0, time.FixedZone("any", 0))},
UD: []byte{0xd8, 0x3d, 0xde, 0x01, 0xd8, 0x3d},
},
},
Err: ucs2.ErrDanglingSurrogate([]byte{0xd8, 0x3d}),
},
},
}
for _, p := range patterns {
mm.r <- []byte(p.rx)
select {
case msg := <-msgChan:
assert.Equal(t, p.msg.Number, msg.Number)
assert.Equal(t, p.msg.Message, msg.Message)
assert.Equal(t, p.msg.SCTS.Unix(), msg.SCTS.Unix())
case err := <-errChan:
require.IsType(t, p.err, err)
switch v := err.(type) {
case gsm.ErrCollect:
xerr := p.err.(gsm.ErrCollect)
assert.Equal(t, xerr.TPDU, v.TPDU)
assert.Equal(t, xerr.Err, v.Err)
case gsm.ErrDecode:
xerr := p.err.(gsm.ErrDecode)
assert.Equal(t, xerr.Err, v.Err)
case gsm.ErrUnmarshal:
xerr := p.err.(gsm.ErrUnmarshal)
assert.Equal(t, xerr.Info, v.Info)
assert.Equal(t, xerr.Err, v.Err)
}
case <-time.After(100 * time.Millisecond):
t.Errorf("no notification received")
}
}
}
func TestStartMessageRxOptions(t *testing.T) {
cmdSet := map[string][]string{
"AT+CSMS=1\r\n": {"\r\nOK\r\n"},
"AT+CNMI=1,2,0,0,0\r\n": {"\r\nOK\r\n"},
"AT+CNMI=1,2,0,0,1\r\n": {"\r\nOK\r\n"},
"AT+CNMA\r\n": {"\r\nOK\r\n"},
}
msgChan := make(chan gsm.Message, 3)
errChan := make(chan error, 3)
mh := func(msg gsm.Message) {
msgChan <- msg
}
eh := func(err error) {
errChan <- err
}
mc := mockCollector{
errChan: errChan,
err: errors.New("mock collector expiry"),
}
sfs := tpdu.TPDU{
FirstOctet: tpdu.FoUDHI,
OA: tpdu.Address{Addr: "1234", TOA: 0x91},
SCTS: tpdu.Timestamp{
Time: time.Date(2017, time.August, 31, 11, 21, 54, 0, time.FixedZone("any", 8*3600)),
},
UDH: tpdu.UserDataHeader{
tpdu.InformationElement{ID: 0, Data: []byte{2, 2, 1}},
},
UD: []byte("a short first segment"),
}
sfsb, _ := sfs.MarshalBinary()
sfsh := hex.EncodeToString(sfsb)
sfsi := fmt.Sprintf("+CMT: ,%d\r\n00%s\r\n", len(sfsh)/2, sfsh)
patterns := []struct {
name string
options []gsm.RxOption
err error
expire bool
}{
{
"default",
nil,
nil,
false,
},
{
"timeout",
[]gsm.RxOption{gsm.WithReassemblyTimeout(time.Microsecond)},
gsm.ErrReassemblyTimeout{TPDUs: []*tpdu.TPDU{&sfs, nil}},
true,
},
{
"collector",
[]gsm.RxOption{gsm.WithCollector(mc)},
mc.err,
true,
},
{
"initCmds",
[]gsm.RxOption{gsm.WithInitCmds("+CNMI=1,2,0,0,1")},
nil,
false,
},
}
for _, p := range patterns {
f := func(t *testing.T) {
g, mm := setupModem(t, cmdSet)
defer teardownModem(mm)
err := g.StartMessageRx(mh, eh, p.options...)
require.Nil(t, err)
mm.r <- []byte(sfsi)
select {
case msg := <-msgChan:
t.Errorf("received message: %v", msg)
case err := <-errChan:
require.IsType(t, p.err, err)
if _, ok := err.(gsm.ErrReassemblyTimeout); !ok {
assert.Equal(t, p.err, err)
} else {
assert.Equal(t, p.err.Error(), err.Error())
}
case <-time.After(100 * time.Millisecond):
assert.False(t, p.expire)
}
}
t.Run(p.name, f)
}
}
func TestStopMessageRx(t *testing.T) {
cmdSet := map[string][]string{
"AT+CSMS=1\r\n": {"\r\nOK\r\n"},
"AT+CNMI=1,2,0,0,0\r\n": {"\r\nOK\r\n"},
"AT+CNMI=0,0,0,0,0\r\n": {"\r\nOK\r\n"},
"AT+CNMA\r\n": {"\r\nOK\r\n"},
}
g, mm := setupModem(t, cmdSet)
mm.echo = false
defer teardownModem(mm)
msgChan := make(chan gsm.Message, 3)
errChan := make(chan error, 3)
mh := func(msg gsm.Message) {
msgChan <- msg
}
eh := func(err error) {
errChan <- err
}
err := g.StartMessageRx(mh, eh)
require.Nil(t, err)
mm.r <- []byte("+CMT: ,24\r\n00040B911234567890F000000250100173832305C8329BFD06\r\n")
select {
case <-msgChan:
case <-time.After(100 * time.Millisecond):
t.Errorf("no notification received")
}
// stop
g.StopMessageRx()
// would return a msg
mm.r <- []byte("+CMT: ,24\r\n00040B911234567890F000000250100173832305C8329BFD06\r\n")
select {
case msg := <-msgChan:
t.Errorf("msg received: %v", msg)
case err := <-errChan:
t.Errorf("error received: %v", err)
case <-time.After(100 * time.Millisecond):
}
// would return an error
mm.r <- []byte("+CMT: ,13\r\n00040B911234567890\r\n")
select {
case msg := <-msgChan:
t.Errorf("msg received: %v", msg)
case err := <-errChan:
t.Errorf("error received: %v", err)
case <-time.After(100 * time.Millisecond):
}
}
func TestUnmarshalTPDU(t *testing.T) {
patterns := []struct {
name string
info []string
tpdu tpdu.TPDU
err error
}{
{
"ok",
[]string{
"+CMT: ,24",
"00040B911234567890F000000250100173832305C8329BFD06",
},
tpdu.TPDU{
FirstOctet: 0x04,
OA: tpdu.Address{TOA: 145, Addr: "21436587090"},
UD: []byte("Hello"),
},
nil,
},
{
"underlength",
[]string{
"+CMT: ,2X",
},
tpdu.TPDU{},
gsm.ErrUnderlength,
},
{
"bad length",
[]string{
"+CMT: ,2X",
"00040B911234567JUNK000000250100173832305C8329BFD06",
},
tpdu.TPDU{},
&strconv.NumError{Func: "Atoi", Num: "2X", Err: strconv.ErrSyntax},
},
{
"mismatched length",
[]string{
"+CMT: ,24",
"00040B911234567890F00000",
},
tpdu.TPDU{},
fmt.Errorf("length mismatch - expected %d, got %d", 24, 11),
},
{
"not hex",
[]string{
"+CMT: ,24",
"00040B911234567JUNK000000250100173832305C8329BFD06",
},
tpdu.TPDU{},
hex.InvalidByteError(0x4a),
},
}
for _, p := range patterns {
f := func(t *testing.T) {
tp, err := gsm.UnmarshalTPDU(p.info)
tp.SCTS = tpdu.Timestamp{}
assert.Equal(t, p.tpdu, tp)
assert.Equal(t, p.err, err)
}
t.Run(p.name, f)
}
}
func TestWithSCA(t *testing.T) {
var sca pdumode.SMSCAddress
sca.Addr = "text"
gopts := []gsm.Option{gsm.WithSCA(sca)}
g, mm := setupModem(t, nil, gopts...)
defer teardownModem(mm)
tp := []byte{1, 2, 3, 4, 5, 6}
omr, oerr := g.SendPDU(tp)
assert.Equal(t, tpdu.EncodeError("addr", semioctet.ErrInvalidDigit(0x74)), oerr)
assert.Equal(t, "", omr)
}
func TestErrors(t *testing.T) {
patterns := []struct {
name string
err error
errStr string
}{
{
"collect",
gsm.ErrCollect{
TPDU: tpdu.TPDU{
FirstOctet: 0x44,
DCS: 0,
SCTS: tpdu.Timestamp{
Time: time.Date(2001, time.January, 1, 0, 0, 0, 0, time.UTC)},
UDH: tpdu.UserDataHeader{
tpdu.InformationElement{ID: 0, Data: []byte{3, 2, 6}},
},
UD: []byte("Hahahaha"),
},
Err: errors.New("twisted"),
},
"error 'twisted' collecting TPDU: {Direction:0 FirstOctet:68 OA:{TOA:0 Addr:} FCS:0 MR:0 CT:0 MN:0 DA:{TOA:0 Addr:} RA:{TOA:0 Addr:} PI:0 SCTS:2001-01-01 00:00:00 +0000 DT:0001-01-01 00:00:00 +0000 ST:0 PID:0 DCS:0x00 7bit VP:{Format:Not Present Time:0001-01-01 00:00:00 +0000 Duration:0s EFI:0} UDH:[{ID:0 Data:[3 2 6]}] UD:[72 97 104 97 104 97 104 97]}",
},
{
"decode",
gsm.ErrDecode{
TPDUs: []*tpdu.TPDU{
{
FirstOctet: 4,
DCS: 0x08,
SCTS: tpdu.Timestamp{
Time: time.Date(2001, time.January, 1, 0, 0, 0, 0, time.FixedZone("any", 0))},
UD: []byte{0xd8, 0x3d, 0xde, 0x01, 0xd8, 0x3d},
},
},
Err: errors.New("dangling surrogate"),
},
"error 'dangling surrogate' decoding: &{Direction:0 FirstOctet:4 OA:{TOA:0 Addr:} FCS:0 MR:0 CT:0 MN:0 DA:{TOA:0 Addr:} RA:{TOA:0 Addr:} PI:0 SCTS:2001-01-01 00:00:00 +0000 DT:0001-01-01 00:00:00 +0000 ST:0 PID:0 DCS:0x08 UCS-2 VP:{Format:Not Present Time:0001-01-01 00:00:00 +0000 Duration:0s EFI:0} UDH:[] UD:[216 61 222 1 216 61]}",
},
{
"reassemblyTimeout",
gsm.ErrReassemblyTimeout{
TPDUs: []*tpdu.TPDU{
{
FirstOctet: 4,
DCS: 0x08,
SCTS: tpdu.Timestamp{
Time: time.Date(2001, time.January, 1, 0, 0, 0, 0, time.FixedZone("any", 0))},
UD: []byte{0xd8, 0x3d, 0xde, 0x01, 0xd8, 0x3d},
},
},
},
"timeout reassembling: &{Direction:0 FirstOctet:4 OA:{TOA:0 Addr:} FCS:0 MR:0 CT:0 MN:0 DA:{TOA:0 Addr:} RA:{TOA:0 Addr:} PI:0 SCTS:2001-01-01 00:00:00 +0000 DT:0001-01-01 00:00:00 +0000 ST:0 PID:0 DCS:0x08 UCS-2 VP:{Format:Not Present Time:0001-01-01 00:00:00 +0000 Duration:0s EFI:0} UDH:[] UD:[216 61 222 1 216 61]}",
},
{
"unmarshal",
gsm.ErrUnmarshal{
Info: []string{
"+CMT: ,2X",
"00040B911234567JUNK000000250100173832305C8329BFD06",
},
Err: errors.New("bent"),
},
"error 'bent' unmarshalling: +CMT: ,2X\n00040B911234567JUNK000000250100173832305C8329BFD06\n",
},
}
for _, p := range patterns {
f := func(t *testing.T) {
assert.Equal(t, p.errStr, p.err.Error())
}
t.Run(p.name, f)
}
}
type mockModem struct {
cmdSet map[string][]string
echo bool
closed bool
readDelay time.Duration
// The buffer emulating characters emitted by the modem.
r chan []byte
}
func (mm *mockModem) Read(p []byte) (n int, err error) {
data, ok := <-mm.r
if data == nil {
return 0, at.ErrClosed
}
time.Sleep(mm.readDelay)
copy(p, data) // assumes p is empty
if !ok {
return len(data), fmt.Errorf("closed with data")
}
return len(data), nil
}
func (mm *mockModem) Write(p []byte) (n int, err error) {
if mm.closed {
return 0, at.ErrClosed