Don't attach the TreeView when the project has no path

src/packages/tree-view/spec/tree-view-spec.coffee

@@ -54,7 +54,12 @@ describe "TreeView", ->
         atom.loadPackage 'tree-view'
         treeView = TreeView.instance
 
-      it "does not attach or create a root node", ->
+      it "does not attach to the root view or create a root node when initialized", ->
+        expect(treeView.hasParent()).toBeFalsy()
+        expect(treeView.root).not.toExist()
+
+      it "does not attach to the root view or create a root node when attach() is called", ->
+        treeView.attach()
         expect(treeView.hasParent()).toBeFalsy()
         expect(treeView.root).not.toExist()
 

src/packages/tree-view/src/tree-view.coffee

@@ -96,6 +96,7 @@ class TreeView extends ScrollView
         @attach()
 
   attach: ->
+    return unless rootView.project.getPath()
     @rootView.horizontal.prepend(this)
     @focus()