npm React addons test stacktrace

- TypeError: /Users/Feifan/Developer/tunetap-demo/app/assets/javascripts/harness/node_modules/react/addons.js: /Users/Feifan/Developer/tunetap-demo/app/assets/javascripts/harness/node_modules/react/lib/ReactWithAddons.js: /Users/Feifan/Developer/tunetap-demo/app/assets/javascripts/harness/node_modules/react/lib/React.js: /Users/Feifan/Developer/tunetap-demo/app/assets/javascripts/harness/node_modules/react/lib/ReactChildren.js: /Users/Feifan/Developer/tunetap-demo/app/assets/javascripts/harness/node_modules/react/lib/traverseAllChildren.js: /Users/Feifan/Developer/tunetap-demo/app/assets/javascripts/harness/node_modules/react/lib/ReactTextComponent.js: /Users/Feifan/Developer/tunetap-demo/app/assets/javascripts/harness/node_modules/react/lib/ReactBrowserComponentMixin.js: /Users/Feifan/Developer/tunetap-demo/app/assets/javascripts/harness/node_modules/react/lib/ReactMount.js: Cannot read property 'ref'