fix lint errors

machine.go

@@ -3,65 +3,65 @@
 package machine
 
 import (
-  "errors"
+	"errors"
 )
 
 type State string
 
 type Stater interface {
-  AddStates(name ...State)
-  GetState(name string) State
-  AddTransition(trigger string, source State, dest State)
-  AddSubscription(transition string, subscription Subscriber) error
-  AddModel(m Modeler)
-  Trigger(transition string) error
-  CurrentState() State
+	AddStates(name ...State)
+	GetState(name string) State
+	AddTransition(trigger string, source State, dest State)
+	AddSubscription(transition string, subscription Subscriber) error
+	AddModel(m Modeler)
+	Trigger(transition string) error
+	CurrentState() State
 }
 
 type Definition struct {
-  states []State
-  triggers map[string]Transitioner
-  model Modeler
+	states   []State
+	triggers map[string]Transitioner
+	model    Modeler
 }
 
 func New(initial State) Stater {
-  return &Definition{ model: NewModel(initial), triggers: make(map[string]Transitioner) }
+	return &Definition{model: NewModel(initial), triggers: make(map[string]Transitioner)}
 }
 
 func (d *Definition) AddStates(name ...State) {
-  d.states = append(d.states, name...) 
+	d.states = append(d.states, name...)
 }
 
 func (d *Definition) AddTransition(trigger string, source State, dest State) {
-  d.triggers[trigger] = NewTransition(trigger, source, dest) 
+	d.triggers[trigger] = NewTransition(trigger, source, dest)
 }
 
 func (d *Definition) GetState(name string) State {
-  var r State
-  for _,s := range(d.states) {
-    if string(s) == name {
-      return s
-    }
-  }
-  return r
+	var r State
+	for _, s := range d.states {
+		if string(s) == name {
+			return s
+		}
+	}
+	return r
 }
 
 func (d *Definition) AddModel(m Modeler) {
-  d.model = m
+	d.model = m
 }
 
 func (d *Definition) Trigger(transition string) error {
-  return d.triggers[transition].Run(d.model)
+	return d.triggers[transition].Run(d.model)
 }
 
 func (d *Definition) CurrentState() State {
-  return d.model.InspectState()
+	return d.model.InspectState()
 }
 
 func (d *Definition) AddSubscription(transition string, subscription Subscriber) error {
-  if t,ok := d.triggers[transition]; ok {
-    t.Subscribe(subscription)
+	if t, ok := d.triggers[transition]; ok {
+		t.Subscribe(subscription)
 		return nil
-  }
-  return errors.New("Transition does not exist")
+	}
+	return errors.New("Transition does not exist")
 }

machine_test.go

@@ -2,68 +2,68 @@
 
 package machine
 
-import(
-  "log"
-  "testing"
+import (
 	"github.com/stretchr/testify/assert"
+	"log"
+	"testing"
 )
 
 func setupStater(initial State) Stater {
-  s := New(initial)
-  if s == nil {
-    log.Fatal("Failed creating new Stater")
-  }
-  return s
+	s := New(initial)
+	if s == nil {
+		log.Fatal("Failed creating new Stater")
+	}
+	return s
 }
 
 func TestMachineStater(t *testing.T) {
-  s := setupStater("disconnected")
+	s := setupStater("disconnected")
 
-  s.AddStates("disconnected", "start_connection", "connected")
-  r := s.GetState("connected")
-  if r != "connected" {
-    t.Errorf("Failed checking state: %s", r)
-  }
+	s.AddStates("disconnected", "start_connection", "connected")
+	r := s.GetState("connected")
+	if r != "connected" {
+		t.Errorf("Failed checking state: %s", r)
+	}
 }
 
 func TestMachineCurrentState(t *testing.T) {
-  s := setupStater("disconnected")
+	s := setupStater("disconnected")
 
-  s.AddStates("disconnected", "start_connection", "connected")
-  r := s.CurrentState()
-  if r != "disconnected" {
-    t.Errorf("Failed checking state: %s", r)
-  }
+	s.AddStates("disconnected", "start_connection", "connected")
+	r := s.CurrentState()
+	if r != "disconnected" {
+		t.Errorf("Failed checking state: %s", r)
+	}
 }
 
 func TestMachineAddTransition(t *testing.T) {
-  s := setupStater("disconnected")
-  s.AddStates("disconnected", "start_connection", "connected")
-  s.AddTransition("connect", "disconnected", "start_connection")
-  s.AddModel(setupModel("disconnected"))
-  // worker gets a trigger message
-  assert.Nil(t, s.Trigger("connect"))
+	s := setupStater("disconnected")
+	s.AddStates("disconnected", "start_connection", "connected")
+	s.AddTransition("connect", "disconnected", "start_connection")
+	s.AddModel(setupModel("disconnected"))
+	// worker gets a trigger message
+	assert.Nil(t, s.Trigger("connect"))
 
-  // machine generates transition event mesages
-  if s.CurrentState() != "start_connection" {
-    t.Errorf("State transition failed for: connect - %s", s.CurrentState())
-  }
+	// machine generates transition event mesages
+	if s.CurrentState() != "start_connection" {
+		t.Errorf("State transition failed for: connect - %s", s.CurrentState())
+	}
 }
 
 func TestMachineAddSubscription(t *testing.T) {
-  x := setupSubscriber()
-  s := setupStater("disconnected")
-  s.AddStates("disconnected", "start_connection", "connected")
-  s.AddTransition("connect", "disconnected", "start_connection")
-  assert.Nil(t, s.AddSubscription("connect", x))
-  s.AddModel(setupModel("disconnected"))
-  s.Trigger("connect")
-  exitMessage := <- *x.(*EventChannel)
-  enterMessage := <- *x.(*EventChannel)
-  if exitMessage.on == EXITSTATEEVENT && exitMessage.source == "disconnected" {
-    if enterMessage.on == ENTERSTATEEVENT && enterMessage.dest == "start_connection" {
-      return
-    }
-  }
-  t.Errorf("Unexpected event message in state transition notification: exit: %s, enter: %s", exitMessage, enterMessage)
+	x := setupSubscriber()
+	s := setupStater("disconnected")
+	s.AddStates("disconnected", "start_connection", "connected")
+	s.AddTransition("connect", "disconnected", "start_connection")
+	assert.Nil(t, s.AddSubscription("connect", x))
+	s.AddModel(setupModel("disconnected"))
+	s.Trigger("connect")
+	exitMessage := <-*x.(*EventChannel)
+	enterMessage := <-*x.(*EventChannel)
+	if exitMessage.on == EXITSTATEEVENT && exitMessage.source == "disconnected" {
+		if enterMessage.on == ENTERSTATEEVENT && enterMessage.dest == "start_connection" {
+			return
+		}
+	}
+	t.Errorf("Unexpected event message in state transition notification: exit: %s, enter: %s", exitMessage, enterMessage)
 }

message.go

@@ -3,28 +3,28 @@
 package machine
 
 import (
-  "fmt"
+	"fmt"
 )
 
 const (
-  ENTERSTATEEVENT = iota
-  EXITSTATEEVENT
+	ENTERSTATEEVENT = iota
+	EXITSTATEEVENT
 )
 
 type Eventtype int
 
 type EventMessage struct {
-  on Eventtype
-  source State
-  dest State
+	on     Eventtype
+	source State
+	dest   State
 }
 
 type EventChannel chan EventMessage
 
 func (e *EventChannel) Notify(m *EventMessage) {
-  *e <- *m
+	*e <- *m
 }
 
 func (m EventMessage) String() string {
-  return fmt.Sprintf("{on: %d, source: %s, dest: %s}", m.on, m.source, m.dest)
+	return fmt.Sprintf("{on: %d, source: %s, dest: %s}", m.on, m.source, m.dest)
 }

model.go

@@ -3,29 +3,29 @@
 package machine
 
 type Modeler interface {
-  Trigger(transition Transitioner) error
-  ChangeState(target State) State
-  InspectState() State
+	Trigger(transition Transitioner) error
+	ChangeState(target State) State
+	InspectState() State
 }
 
 type Model struct {
-  state State
+	state State
 }
 
 func NewModel(initial State) Modeler {
-  return &Model{ state: initial }
+	return &Model{state: initial}
 }
 
 func (m *Model) Trigger(transition Transitioner) error {
-  return transition.Run(m)
+	return transition.Run(m)
 }
 
 func (m *Model) ChangeState(target State) State {
-  oldState :=  m.state
-  m.state = target
-  return oldState
+	oldState := m.state
+	m.state = target
+	return oldState
 }
 
 func (m *Model) InspectState() State {
-  return m.state
+	return m.state
 }

model_test.go

@@ -3,27 +3,27 @@
 package machine
 
 import (
-  "testing"
+	"testing"
 )
 
 func setupModel(initial State) Modeler {
-  return NewModel(initial)
+	return NewModel(initial)
 }
 
 func TestMachineModel(t *testing.T) {
-  m := setupModel("")
-  if m == nil {
-    t.Errorf("Failed creating new model")
-  }
+	m := setupModel("")
+	if m == nil {
+		t.Errorf("Failed creating new model")
+	}
 }
 
 func TestMachineModelChangeState(t *testing.T) {
-  m := setupModel("")
-  oldState := m.ChangeState("connected")
-  if oldState != "" {
-    t.Errorf("Failed changing state in model")
-  }
-  if m.InspectState() != "connected" {
-    t.Errorf("Failed changing state in model")
-  }
+	m := setupModel("")
+	oldState := m.ChangeState("connected")
+	if oldState != "" {
+		t.Errorf("Failed changing state in model")
+	}
+	if m.InspectState() != "connected" {
+		t.Errorf("Failed changing state in model")
+	}
 }

state.go

@@ -3,10 +3,9 @@
 package machine
 
 type mState struct {
-  name string
+	name string
 }
 
 func NewState(name string) *mState {
-  return &mState{ name: name }
+	return &mState{name: name}
 }
-

state_test.go

@@ -3,12 +3,12 @@
 package machine
 
 import (
-  "testing"
+	"testing"
 )
 
 func TestMachineState(t *testing.T) {
-  s := NewState("connected")
-  if s == nil {
-    t.Errorf("Failed creating new state")
-  }
+	s := NewState("connected")
+	if s == nil {
+		t.Errorf("Failed creating new state")
+	}
 }

subscription.go

@@ -3,5 +3,5 @@
 package machine
 
 type Subscriber interface {
-  Notify(m *EventMessage) 
+	Notify(m *EventMessage)
 }

transition.go

@@ -3,45 +3,45 @@
 package machine
 
 import (
-  "fmt"
-  "errors"
+	_ "errors"
+	"fmt"
 )
 
 type Transitioner interface {
-  Run(m Modeler) error
-  Subscribe(s Subscriber)
+	Run(m Modeler) error
+	Subscribe(s Subscriber)
 }
 
 type Transition struct {
-  trigger string
-  source State
-  dest State
-  subscriptions []Subscriber
+	trigger       string
+	source        State
+	dest          State
+	subscriptions []Subscriber
 }
 
 func NewTransition(trigger string, source State, dest State) Transitioner {
-  return &Transition{ trigger: trigger, source: source, dest: dest }
+	return &Transition{trigger: trigger, source: source, dest: dest}
 }
 
 func (r *Transition) Run(m Modeler) error {
-  currentState := m.InspectState()
-  if currentState == r.source {
-    res := m.ChangeState(r.dest)
-    if res == currentState {
-      r.Notify(EXITSTATEEVENT, currentState, r.dest)
-      r.Notify(ENTERSTATEEVENT, currentState, r.dest)
-      return nil
-    }
-  }
-  return errors.New(fmt.Sprintf("Transition from %s to %s failed on model state %s", r.source, r.dest, currentState))
+	currentState := m.InspectState()
+	if currentState == r.source {
+		res := m.ChangeState(r.dest)
+		if res == currentState {
+			r.Notify(EXITSTATEEVENT, currentState, r.dest)
+			r.Notify(ENTERSTATEEVENT, currentState, r.dest)
+			return nil
+		}
+	}
+	return fmt.Errorf("Transition from %s to %s failed on model state %s", r.source, r.dest, currentState)
 }
 
 func (r *Transition) Subscribe(s Subscriber) {
-  r.subscriptions = append(r.subscriptions, s)
+	r.subscriptions = append(r.subscriptions, s)
 }
 
 func (r *Transition) Notify(on Eventtype, source State, dest State) {
-  for _,s := range r.subscriptions {
-    s.Notify(&EventMessage{ on: on, source: source, dest: dest})
-  }
+	for _, s := range r.subscriptions {
+		s.Notify(&EventMessage{on: on, source: source, dest: dest})
+	}
 }

transition_test.go

@@ -3,53 +3,53 @@
 package machine
 
 import (
-  "log"
-  "testing"
 	"github.com/stretchr/testify/assert"
+	"log"
+	"testing"
 )
 
 func setupTransition() Transitioner {
-  t := NewTransition("open", "closed", "open")
-  if t == nil {
-    log.Fatal("Failed creating new transition")
-  }
-  return t
+	t := NewTransition("open", "closed", "open")
+	if t == nil {
+		log.Fatal("Failed creating new transition")
+	}
+	return t
 }
 
 func setupSubscriber() Subscriber {
-  c := make(EventChannel, 2)
-  return &c
+	c := make(EventChannel, 2)
+	return &c
 }
 
 func TestNewTransition(t *testing.T) {
-  s := NewTransition("connect", "disconnected", "connected")
-  if s == nil {
-    t.Errorf("Failed creating new transition")
-  }
+	s := NewTransition("connect", "disconnected", "connected")
+	if s == nil {
+		t.Errorf("Failed creating new transition")
+	}
 }
 
 func TestTransitionExecution(t *testing.T) {
-  s := setupTransition()
-  m := setupModel("closed")
-  assert.Nil(t, s.Run(m))
-  state := m.InspectState()
-  if state != "open" {
-    t.Errorf("Failed to transition state: %s", state)
-  }
+	s := setupTransition()
+	m := setupModel("closed")
+	assert.Nil(t, s.Run(m))
+	state := m.InspectState()
+	if state != "open" {
+		t.Errorf("Failed to transition state: %s", state)
+	}
 }
 
 func TestTransitionSubscribe(t *testing.T) {
-  c := setupSubscriber()
-  s := setupTransition()
-  s.Subscribe(c)
-  m := setupModel("closed")
-  assert.Nil(t, s.Run(m))
-  exitEvent := <- *c.(*EventChannel)
-  enterEvent := <- *c.(*EventChannel)
-  if exitEvent.on != EXITSTATEEVENT {
-    t.Errorf("Invalid exit event")
-  }
-  if enterEvent.on != ENTERSTATEEVENT {
-    t.Errorf("Invalid enter event")
-  }
+	c := setupSubscriber()
+	s := setupTransition()
+	s.Subscribe(c)
+	m := setupModel("closed")
+	assert.Nil(t, s.Run(m))
+	exitEvent := <-*c.(*EventChannel)
+	enterEvent := <-*c.(*EventChannel)
+	if exitEvent.on != EXITSTATEEVENT {
+		t.Errorf("Invalid exit event")
+	}
+	if enterEvent.on != ENTERSTATEEVENT {
+		t.Errorf("Invalid enter event")
+	}
 }