npm run test有问题

[landaozhu]

FAIL test/component/TodoList.spec.js
● Test suite failed to run

react-dom@15.5+ and react-test-renderer are implicit dependencies when using react@15.5+ with enzyme. Please add the appropriate version to your devDependencies. See https://github.com/airbnb/enzyme#installation
  
  at Object.<anonymous> (node_modules/enzyme/build/react-compat.js:142:13)
  at Object.<anonymous> (node_modules/enzyme/build/Utils.js:65:20)
  at Object.<anonymous> (node_modules/enzyme/build/MountedTraversal.js:36:14)
  at Object.<anonymous> (node_modules/enzyme/build/ReactWrapper.js:35:25)
  at Object.<anonymous> (node_modules/enzyme/build/index.js:6:21)
  at Object.<anonymous> (__test__/component/TodoList.spec.js:3:15)