rename mock things to memory

registry/memory/memory_watcher.go

@@ -0,0 +1,29 @@
+package memory
+
+import (
+	"errors"
+
+	"github.com/micro/go-micro/registry"
+)
+
+type memoryWatcher struct {
+	exit chan bool
+	opts registry.WatchOptions
+}
+
+func (m *memoryWatcher) Next() (*registry.Result, error) {
+	// not implement so we just block until exit
+	select {
+	case <-m.exit:
+		return nil, errors.New("watcher stopped")
+	}
+}
+
+func (m *memoryWatcher) Stop() {
+	select {
+	case <-m.exit:
+		return
+	default:
+		close(m.exit)
+	}
+}