Merge pull request #279 from 2hu12/patch-1

Update cacheKeyForTree to cache the treeForVendor

index.js

@@ -26,6 +26,7 @@ const concat = require('broccoli-concat');
 const map = stew.map;
 const Rollup = require('broccoli-rollup');
 const BroccoliDebug = require('broccoli-debug');
+const calculateCacheKeyForTree = require('calculate-cache-key-for-tree');
 
 const debug = BroccoliDebug.buildDebugCallback('ember-fetch');
 
@@ -135,9 +136,11 @@ module.exports = {
 
   cacheKeyForTree(treeType) {
     if (treeType === 'public') {
-      return require('calculate-cache-key-for-tree')('public', this, [!this.parent.parent]);
+      return calculateCacheKeyForTree('public', this, [!this.parent.parent]);
     } else {
-      return this._super.cacheKeyForTree.call(this, treeType);
+      // make sure results of other treeFor* methods won't get opt-out of cache
+      // including the "treeForVendor"
+      return calculateCacheKeyForTree(treeType, this);
     }
   },