Insert bug detected (because of references)

lib/Operations/Basic.coffee

@@ -508,13 +508,15 @@ module.exports = ()->
     _encode: (json = {})->
       json.prev = @prev_cl.getUid()
       json.next = @next_cl.getUid()
-      json.parent = @parent.getUid()
 
       if @origin.type is "Delimiter"
         json.origin = "Delimiter"
       else if @origin isnt @prev_cl
         json.origin = @origin.getUid()
 
+      # if not (json.prev? and json.next?)
+      json.parent = @parent.getUid()
+
       if @content?.getUid?
         json['content'] = @content.getUid()
       else

package.json

@@ -26,6 +26,7 @@
   },
   "homepage": "https://dadamonad.github.io/yjs/",
   "dependencies": {
+    "chai": "^2.2.0"
   },
   "devDependencies": {
     "codo": "^2.0.9",