wip: bugfix with dirPath

Author: Gaurav0

lib/models/addon-test-app.js

@@ -24,6 +24,9 @@ AddonTestApp.prototype.create = function(appName, options) {
 
   return pristine.createApp(appName, options)
     .then(appPath => {
+      if (!appPath) {
+        return Promise.reject('createApp failed');
+      }
       this.path = appPath;
       return options.noFixtures ?
         Promise.resolve() :

lib/utilities/run-ember.js

@@ -6,10 +6,10 @@ const runCommand = require('./run-command');
 
 module.exports = function(command, options, dirPath) {
   let emberCLIPath = findup('node_modules/ember-cli', {
-    cwd: dirPath || __dirname
+    cwd: dirPath ? !dirPath.includes('/var') ? dirPath || __dirname : __dirname : __dirname
   });
 
-  let args = [path.join(emberCLIPath, 'bin', 'ember'), command].concat(options);
+  let args = ['node', path.join(emberCLIPath, 'bin', 'ember'), command].concat(options);
 
   return runCommand.apply(undefined, args);
 };