Next.js Quick Start Guide

Setting up cloud coverage statistics

 

It is very useful to track coverage status changes after commits:

• It reveals risky changes early
• It gives a clear warning to go ahead and fix it before it gets out of hand

For this example, we will use a free service called Coveralls:

$ npm install react react-dom --save$ npm install coveralls jest next react-test-renderer --save-dev

Same as before; we need to configure Babel too:

// .babelrc{  "env": {    "test": {      "presets": [        [          "env",          {            "modules": "commonjs"          }        ],        "next/babel"      ]    },    "development": {      "presets": [        "next/babel"      ]    }  }}

Let's configure Jest to collect coverage for us:

// jest.config.jsmodule.exports = {    testPathIgnorePatterns: [        './.idea',        './.next',        './node_modules'    ], collectCoverage: true, ...