Source watcher ErrStoppedWatcher and fixed test

config/source/consul/watcher.go

@@ -1,7 +1,6 @@
 package consul
 
 import (
-	"errors"
 	"time"
 
 	"github.com/hashicorp/consul/api"
@@ -80,7 +79,7 @@ func (w *watcher) Next() (*source.ChangeSet, error) {
 	case cs := <-w.ch:
 		return cs, nil
 	case <-w.exit:
-		return nil, errors.New("watcher stopped")
+		return nil, source.ErrWatcherStopped
 	}
 }
 

config/source/env/env_test.go

@@ -86,8 +86,8 @@ func TestEnvvar_Prefixes(t *testing.T) {
 }
 
 func TestEnvvar_WatchNextNoOpsUntilStop(t *testing.T) {
-	source := NewSource(WithStrippedPrefix("GOMICRO_"))
-	w, err := source.Watch()
+	src := NewSource(WithStrippedPrefix("GOMICRO_"))
+	w, err := src.Watch()
 	if err != nil {
 		t.Error(err)
 	}
@@ -97,7 +97,7 @@ func TestEnvvar_WatchNextNoOpsUntilStop(t *testing.T) {
 		w.Stop()
 	}()
 
-	if _, err := w.Next(); err.Error() != "watcher stopped" {
+	if _, err := w.Next(); err != source.ErrWatcherStopped {
 		t.Errorf("expected watcher stopped error, got %v", err)
 	}
 }

config/source/env/watcher.go

@@ -1,8 +1,6 @@
 package env
 
 import (
-	"errors"
-
 	"github.com/micro/go-micro/config/source"
 )
 
@@ -13,7 +11,7 @@ type watcher struct {
 func (w *watcher) Next() (*source.ChangeSet, error) {
 	<-w.exit
 
-	return nil, errors.New("watcher stopped")
+	return nil, source.ErrWatcherStopped
 }
 
 func (w *watcher) Stop() error {

config/source/file/watcher.go

@@ -3,7 +3,6 @@
 package file
 
 import (
-	"errors"
 	"os"
 
 	"github.com/fsnotify/fsnotify"
@@ -36,7 +35,7 @@ func (w *watcher) Next() (*source.ChangeSet, error) {
 	// is it closed?
 	select {
 	case <-w.exit:
-		return nil, errors.New("watcher stopped")
+		return nil, source.ErrWatcherStopped
 	default:
 	}
 
@@ -59,7 +58,7 @@ func (w *watcher) Next() (*source.ChangeSet, error) {
 	case err := <-w.fw.Errors:
 		return nil, err
 	case <-w.exit:
-		return nil, errors.New("watcher stopped")
+		return nil, source.ErrWatcherStopped
 	}
 }
 

config/source/file/watcher_linux.go

@@ -3,7 +3,6 @@
 package file
 
 import (
-	"errors"
 	"os"
 
 	"github.com/fsnotify/fsnotify"
@@ -36,7 +35,7 @@ func (w *watcher) Next() (*source.ChangeSet, error) {
 	// is it closed?
 	select {
 	case <-w.exit:
-		return nil, errors.New("watcher stopped")
+		return nil, source.ErrWatcherStopped
 	default:
 	}
 
@@ -63,7 +62,7 @@ func (w *watcher) Next() (*source.ChangeSet, error) {
 	case err := <-w.fw.Errors:
 		return nil, err
 	case <-w.exit:
-		return nil, errors.New("watcher stopped")
+		return nil, source.ErrWatcherStopped
 	}
 }
 

config/source/source.go

@@ -2,9 +2,15 @@
 package source
 
 import (
+	"errors"
 	"time"
 )
 
+var (
+	// ErrWatcherStopped is returned when source watcher has been stopped
+	ErrWatcherStopped = errors.New("watcher stopped")
+)
+
 // Source is the source from which config is loaded
 type Source interface {
 	Read() (*ChangeSet, error)