diff --git a/pkg/device/device.go b/pkg/device/device.go
index afdd603..309949c 100644
--- a/pkg/device/device.go
+++ b/pkg/device/device.go
@@ -12,6 +12,15 @@ import (
     // "reflect"
 )
 
+var timeNow = func() time.Time {
+    return time.Now()
+}
+
+
+
+type Error string
+func (e Error) Error() string { return string(e) }
+
 type DeviceState struct {
     Mode         string    `json:"mode"`
     Setpoint     int       `json:"setpoint"`
@@ -51,113 +60,34 @@ func (d *Device) StateTopic() string {
     return fmt.Sprintf("heater/%s/state", d.Name)
 }
 
-func (d *Device) CheckSetpoint(logger *zerolog.Logger, pubchan chan Message) error {
-    // Handle all the update setpoint logic
-    // push in pubChan a Message if setpoint need to be update
-    log := logger.With().
-            Str("device", d.Name).
-            Int("current_setpoint", d.CurrentSetpoint).
-            Str("State.Mode", d.State.Mode).
-            Int("State.Setpoint", d.State.Setpoint).
-            Str("State.Program_name", d.State.Program_name).
-            Logger()
-    log.Info().Msg("Check if setpoint need an update")
-
-    switch d.State.Mode {
-    case "always":
-        log.Info().Msg("Use always")
-
-    case "until_time":
-        log.Info().Msg("Use until_time")
-        if d.State.Until_time.Before(time.Now()) {
-            log.Info().Time("until_time", d.State.Until_time).
-                Msg("until_time passed, reset")
-            return d.setProgAndReset(&log, pubchan)
-        }
-
-    case "until_next":
-        log.Info().Msg("Use until_next")
-
-        var prog string = "default"
-        if d.State.Program_name != "" {
-            prog = d.State.Program_name
-        }
-        program, ok := d.Settings.Programs[prog]
-        if !ok {
-            return fmt.Errorf("program not found")
-        }
-        next, err := program.NextTime(d.State.Time)
-        if err!= nil {
-            return err
-        }
-        if time.Now().After(next) {
-            // force current program
-            // reset state
-            log.Info().Time("now", time.Now()).Time("next", next).Msg("until_next expired")
-            return  d.setProgAndReset(&log, pubchan)
-        }
-    case "program":
-        log.Info().Msg("Use program mode")
-        if d.State.Setpoint == 0 {
-            //in case of new program mode
-            var prog string = "default"
-            if d.State.Program_name != "" {
-                prog = d.State.Program_name
-            }
-            value, err := d.setpointValueProg(prog)
-            if err != nil {
-                return err
-            }
-            d.State.Setpoint = value
-            d.PublishState(d.State, pubchan)
-        }
-
-    default:
-        log.Info().Msg("Use default mode")
-        return d.setProgAndReset(&log, pubchan)
-    }
-
-    if d.State.Setpoint != d.CurrentSetpoint {
-        log.Warn().Msg("Need setpoint update")
-        return d.publishSetpoint(d.State.Setpoint, pubchan)
-    } else {
-        log.Warn().Msg("No setpoint update")
-    }
-
-    return nil
+func (d Device) ListenTopic() (string, error) {
+    return d.Settings.TVR.FormatTopicState(d.Name)
 }
 
-func (d *Device) setProgAndReset(logger *zerolog.Logger, pubchan chan Message) error {
+func (d *Device) Program() (WeekProgram, error) {
+    // return current device program if specified or default one
     prog_name := "default"
     if d.State.Program_name != "" {
         prog_name = d.State.Program_name
     }
-    log := logger.With().Str("program", prog_name).Logger()
 
-    value, err := d.setpointValueProg(prog_name)
-    if err != nil {
-        return err
-    }
-    log = log.With().Int("futur_setpoint", value).Logger()
-
-    if d.CurrentSetpoint != value {
-        log.Warn().Msg("publish setpoint update")
-        err = d.publishSetpoint(value, pubchan)
-        if err != nil {
-            return err
-        }
-    } else {
-        log.Warn().Msg("no setpoint update")
+    program, ok := d.Settings.Programs[prog_name]
+    if !ok {
+        return WeekProgram{}, Error(fmt.Sprintf("device %s don't have %s program", d.Name, prog_name))
     }
 
-    state := DeviceState{
-        Setpoint: value,
-        Mode: "program",
-        Program_name: prog_name,
-        Time: time.Now(),
-    }
+    return program, nil
+}
 
-    d.State = state
+func (d *Device) ProgramName() (string) {
+    prog_name := "default"
+    if d.State.Program_name != "" {
+        prog_name = d.State.Program_name
+    }
+    return prog_name
+}
+
+func (d *Device) SetState(state DeviceState, pubchan chan Message) error {
 
     payload, err := json.Marshal(state)
     if err != nil {
@@ -169,10 +99,13 @@ func (d *Device) setProgAndReset(logger *zerolog.Logger, pubchan chan Message) e
         Payload: payload,
         Retain: true,
     }
+
+    d.State = state
+
     return nil
 }
 
-func (d *Device) publishSetpoint(value int, pubchan chan Message) error {
+func (d *Device) SetSetpoint(value int, pubchan chan Message) error {
     topic, err := d.Settings.TVR.FormatTopic(d.Name)
     if err != nil {
         return err
@@ -191,22 +124,70 @@ func (d *Device) publishSetpoint(value int, pubchan chan Message) error {
     return nil
 }
 
-func (d *Device) PublishState(state DeviceState, pubchan chan Message) error {
-    payload, err := json.Marshal(state)
+
+func (d *Device) CheckSetpoint(logger *zerolog.Logger, pubchan chan Message) error {
+    // Handle all the update setpoint logic
+    // push in pubChan a Message if setpoint need to be update
+    log := logger.With().
+            Str("device", d.Name).
+            Int("current_setpoint", d.CurrentSetpoint).
+            Str("State.Mode", d.State.Mode).
+            Int("State.Setpoint", d.State.Setpoint).
+            Str("State.Program_name", d.State.Program_name).
+            Logger()
+    log.Info().Msg("Check if setpoint need an update")
+
+    switch d.State.Mode {
+    case "always":
+        return d.handle_always(&log, pubchan)
+
+    case "until_time":
+        return d.handle_until_time(&log, pubchan)
+
+    case "until_next":
+        return d.handle_until_next(&log, pubchan)
+    case "program":
+        return d.handle_program(&log, pubchan)
+    default:
+        log.Info().Msg("Use default mode")
+        return d.setProgAndReset(&log, pubchan)
+    }
+
+}
+
+func (d *Device) setProgAndReset(log *zerolog.Logger, pubchan chan Message) error {
+    program, err := d.Program()
     if err != nil {
         return err
     }
-    pubchan <- Message{
-        Topic: d.StateTopic(),
-        Payload: payload,
-        Retain: true,
+
+    current_setpoint := program.Current()
+
+    value, err := current_setpoint.Value(d.Settings.Presets)
+    if err != nil {
+        return err
     }
-    return nil
+
+    if d.CurrentSetpoint != value {
+        log.Info().Msg("publish setpoint update")
+        err = d.SetSetpoint(value, pubchan)
+        if err != nil {
+            return err
+        }
+    } else {
+        log.Info().Msg("no setpoint update")
+    }
+
+    state := DeviceState{
+        Setpoint: value,
+        Mode: "program",
+        Program_name: d.ProgramName(),
+        Time: timeNow(),
+    }
+
+    return d.SetState(state, pubchan)
 }
 
-func (d Device) ListenTopic() (string, error) {
-    return d.Settings.TVR.FormatTopicState(d.Name)
-}
 
 func (d *Device) onMessage(ctx context.Context, msg mqtt.Message) {
     log := zerolog.Ctx(ctx).With().
@@ -241,30 +222,83 @@ func (d *Device) onMessage(ctx context.Context, msg mqtt.Message) {
 
 }
 
-func (d *Device) programSetpoint(prog_name string) (Setpoint, error) {
-    program, ok := d.Settings.Programs[prog_name]
-    if !ok {
-        return Setpoint{}, fmt.Errorf("device %s don't have %s program", d.Name, prog_name)
+
+func (d *Device) handle_always(log *zerolog.Logger, pubchan chan Message) error {
+    if d.State.Setpoint != d.CurrentSetpoint {
+        return d.SetSetpoint(d.State.Setpoint, pubchan)
     }
-    setpoint := program.Current()
-    return setpoint, nil
+
+    return nil
 }
 
-func (d *Device) setpointValue(setpoint Setpoint) (int, error) {
-    if len(d.Settings.Presets) < setpoint.Preset_id + 1 {
-        return 0, fmt.Errorf("Preset id %d didn't found", setpoint.Preset_id)
+func (d *Device) handle_until_time(log *zerolog.Logger, pubchan chan Message) error {
+    *log = log.With().Time("until_time", d.State.Until_time).Logger()
+
+    if d.State.Until_time.Before(timeNow()) {
+        log.Info().Msg("until_time passed, reset")
+        return d.setProgAndReset(log, pubchan)
     }
-    return d.Settings.Presets[setpoint.Preset_id].Value, nil
+
+    if d.State.Setpoint != d.CurrentSetpoint {
+        log.Info().Msg("need setpoint update")
+        return d.SetSetpoint(d.State.Setpoint, pubchan)
+    }
+
+    return nil
 }
 
-func (d *Device) setpointValueProg(prog_name string) (int, error) {
-    setpoint, err := d.programSetpoint(prog_name)
-    if err != nil{
-        return 0, err
+func (d *Device) handle_until_next(log *zerolog.Logger, pubchan chan Message) error {
+    *log = log.With().Time("until_next", d.State.Time).Logger()
+
+    program, err := d.Program()
+    if err != nil {
+        return err
     }
-    val, err := d.setpointValue(setpoint)
-    if err != nil{
-        return 0, err
+
+    next, err := program.NextTime(d.State.Time)
+    if err!= nil {
+        return err
     }
-    return val, nil
+
+    if timeNow().After(next) {
+        // force current program
+        // reset state
+        log.Info().Time("now", timeNow()).Time("next", next).Msg("until_next expired")
+        return  d.setProgAndReset(log, pubchan)
+    }
+
+    if d.State.Setpoint != d.CurrentSetpoint {
+        log.Info().Msg("need setpoint update")
+        return d.SetSetpoint(d.State.Setpoint, pubchan)
+    }
+
+    return nil
+}
+
+func (d *Device) handle_program(log *zerolog.Logger, pubchan chan Message) error {
+    *log = log.With().Str("program", d.State.Program_name).Logger()
+
+    program, err := d.Program()
+    if err != nil {
+        return err
+    }
+
+    current_setpoint := program.Current()
+
+    value, err := current_setpoint.Value(d.Settings.Presets)
+    if err != nil {
+        return err
+    }
+
+    if d.CurrentSetpoint != value {
+        log.Info().Msg("publish setpoint update")
+        err = d.SetSetpoint(value, pubchan)
+        if err != nil {
+            return err
+        }
+    } else {
+        log.Info().Msg("no setpoint update")
+    }
+
+    return nil
 }
diff --git a/pkg/device/device_test.go b/pkg/device/device_test.go
index 16f8fa1..2e21942 100644
--- a/pkg/device/device_test.go
+++ b/pkg/device/device_test.go
@@ -2,23 +2,183 @@ package device
 
 import (
     "testing"
+    "time"
+    "fmt"
+    "reflect"
+    "github.com/rs/zerolog"
+    "io/ioutil"
 )
 
-var goodDefaultDevice = Device {
+// monday
+var test_time = time.Date(2022, time.October, 24, 0, 0, 0, 0, time.Local)
+
+
+
+
+var test_presets = []Preset{
+    {Label: "default", Value: 17, Color: "#012a36"},
+    {Label: "normal", Value: 19, Color: "#b6244f"},
+}
+
+var test_setpoints = []Setpoint{
+    {Start: 7*60, Preset_id: 1},
+    {Start: 8*60, Preset_id: 0},
+    {Start: 16*60, Preset_id: 1},
+    {Start: 22*60, Preset_id: 0},
+}
+
+var test_weekprogram = WeekProgram{
+    Monday:    test_setpoints,
+    Thuesday:  test_setpoints,
+    Wednesday: test_setpoints,
+    Thursday : test_setpoints,
+    Friday:    test_setpoints,
+    Saturday:  test_setpoints,
+    Sunday:    test_setpoints,
+}
+
+var test_programs = Programs{
+    "default": test_weekprogram,
+}
+
+var test_device = Device {
     Name: "valid",
-    Settings: DefaultDeviceSettings,
+    Settings: DeviceSettings{
+        Programs: test_programs,
+        Presets: test_presets,
+        TVR: DefaultTVRSettings,
+    },
     CurrentSetpoint: 0,
-    State: DeviceState{},
+    State: DeviceState{
+        Mode: "program",
+        Setpoint: 14,
+        Time: test_time,
+        Program_name: "default",
+    },
 }
 
 
 func TestStateTopic(t *testing.T) {
-    topic := goodDefaultDevice.StateTopic()
+    topic := test_device.StateTopic()
     if topic != "heater/valid/state" {
         t.Errorf("Got %s; want heater/valid/state", topic)
     }
 }
 
+func TestProgram(t *testing.T) {
+    //case 1: no program set in state return default
+    case1_device := test_device
+    case1_device.State.Program_name = ""
+
+    //case 2: program set "confort" must return it
+    var test_confort_weekprogram = WeekProgram{
+        Monday:    test_setpoints,
+        Thuesday:  test_setpoints,
+        Wednesday: test_setpoints,
+        Thursday : test_setpoints,
+        Friday:    test_setpoints,
+        Saturday:  test_setpoints,
+        Sunday:    test_setpoints,
+    }
+    case2_device := test_device
+    case2_device.Settings.Programs = Programs{
+        "default": test_weekprogram,
+        "confort": test_confort_weekprogram,
+    }
+    case2_device.State.Program_name = "confort"
+
+    //case 3: program set "confort" but not exist
+    case3_device := test_device
+    case3_device.State.Program_name = "confort"
+
+    var tests = []struct {
+        name string
+        device Device
+        result WeekProgram
+        err    error
+    }{
+        {"case 1 no program set use default", case1_device, DefaultWeekProgram, nil},
+        {"case 2 program confort", case2_device, test_confort_weekprogram, nil},
+        {"case 3 program confort no defined", case3_device, WeekProgram{}, Error("device valid don't have confort program")},
+    }
+    for _, tt := range tests {
+        testname := fmt.Sprintf("%s", tt.name )
+        t.Run(testname, func(t *testing.T) {
+            prog, err := tt.device.Program()
+            if err != tt.err {
+                t.Errorf("got %s, want %s", err, tt.err)
+            }
+            if !reflect.DeepEqual(prog,tt.result) {
+                t.Errorf("got %v, want %v", prog, tt.result)
+            }
+        })
+    }
+}
+
 
 func TestCheckSetpoint(t *testing.T) {
+    timeNow = func() time.Time {
+        return test_time
+    }
+
+    device1 := test_device
+    device1.Name = "1"
+    device1.State = DeviceState{
+        Mode: "program",
+        Setpoint: 0,
+        Time: test_time,
+        Program_name: "",
+    }
+
+    device2 := test_device
+    device2.Name = "2"
+    device2.State.Program_name = "unknown"
+
+    var tests = []struct{
+        device Device
+        want []Message
+        err error
+    }{
+        {device1, []Message{Message{
+            Payload: []byte("{\"current_heating_setpoint\": 17}"),
+            Topic: "zigbee2mqtt/TVR/1/set",
+            Retain: false,
+        }}, nil} ,
+        {device2, []Message{}, Error("device 2 don't have unknown program")},
+    }
+
+    for _, tt := range tests {
+        testname := fmt.Sprintf("%s", tt.device.Name )
+        t.Run(testname, func(t *testing.T) {
+
+             result := []Message{}
+
+            rchan := make(chan Message, 10)
+            errchan := make(chan error, 1)
+
+            go func(result chan Message, errchan chan error) {
+                logger := zerolog.New(ioutil.Discard).With().Timestamp().Logger()
+                errchan <- tt.device.CheckSetpoint(&logger, result)
+                close(rchan)
+                close(errchan)
+            }(rchan, errchan)
+
+            for msg := range rchan {
+                result = append(result, msg)
+            }
+
+            err, ok := <- errchan
+            if !ok {
+                t.Fatal(err)
+            }
+
+            if err != tt.err {
+                t.Errorf("got %s, want %s", err, tt.err)
+            }
+
+            if !reflect.DeepEqual(result,tt.want) {
+                t.Errorf("got %v, want %v", result, tt.want)
+            }
+        })
+    }
 }
diff --git a/pkg/device/settings.go b/pkg/device/settings.go
index 18ecede..7270d20 100644
--- a/pkg/device/settings.go
+++ b/pkg/device/settings.go
@@ -75,13 +75,21 @@ type Setpoint struct {
     Preset_id int `json:"preset_id"`
 }
 
+func (s Setpoint) Value(presets []Preset) (int, error) {
+    //TODO need test
+    if len(presets) < s.Preset_id + 1 {
+        return 0, Error(fmt.Sprintf("preset id %d not found", s.Preset_id))
+    }
+    return presets[s.Preset_id].Value, nil
+}
 
 
 type WeekProgram map[DayOfWeek][]Setpoint
 
 func (p WeekProgram) Current() Setpoint {
+    // TODO: need test
     // return current Setpoint
-    now := time.Now()
+    now := timeNow()
     weekday := weekday(now)
     daytime := daytime(now)
     setpoint := Setpoint{}
@@ -236,10 +244,10 @@ var DefaultPrograms = Programs{
 }
 
 var DefaultTVRSettings = TVRSettings {
-    Setpoint_topic       : "zigbee2mqtt/TVR/{{.Device}}/set", 
-    Setpoint_payload     : "{\"current_heating_setpoint\": {{.Setpoint}}}", 
-    Setpoint_state_topic : "zigbee2mqtt/TVR/{{.Device}}", 
-    Setpoint_state_jp    : "$.current_heating_setpoint", 
+    Setpoint_topic       : "zigbee2mqtt/TVR/{{.Device}}/set",
+    Setpoint_payload     : "{\"current_heating_setpoint\": {{.Setpoint}}}",
+    Setpoint_state_topic : "zigbee2mqtt/TVR/{{.Device}}",
+    Setpoint_state_jp    : "$.current_heating_setpoint",
 }
 
 var DefaultDeviceSettings = DeviceSettings{