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add mocha example (#5182)
Adding an example of testing with Mocha #4767
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examples/with-mocha/.babelrc
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examples/with-mocha/.babelrc
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{
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"env": {
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"development": {
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"presets": ["next/babel"]
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},
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"production": {
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"presets": ["next/babel"]
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},
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"test": {
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"presets": [["next/babel", { "preset-env": { "modules": "commonjs" } }]]
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}
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}
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}
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examples/with-mocha/README.md
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examples/with-mocha/README.md
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[![Deploy to now](https://deploy.now.sh/static/button.svg)](https://deploy.now.sh/?repo=https://github.com/zeit/next.js/tree/master/examples/with-mocha)
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# Example app with Mocha tests
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## How to use
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### Using `create-next-app`
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Execute [`create-next-app`](https://github.com/segmentio/create-next-app) with [Yarn](https://yarnpkg.com/lang/en/docs/cli/create/) or [npx](https://github.com/zkat/npx#readme) to bootstrap the example:
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```bash
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npx create-next-app --example with-mocha with-mocha-app
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# or
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yarn create next-app --example with-mocha with-mocha-app
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```
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### Download manually
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Download the example:
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```bash
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curl https://codeload.github.com/zeit/next.js/tar.gz/canary | tar -xz --strip=2 next.js-canary/examples/with-mocha
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cd with-mocha
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```
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Install it and run:
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```bash
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npm install
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npm run dev
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# or
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yarn
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yarn dev
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```
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## Run Mocha tests
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```bash
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npm run test
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# or
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yarn test
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```
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## The idea behind the example
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This example features:
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* An app with Mocha tests
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> A very important part of this example is the `.babelrc` file which configures the `test` environment to use `babel-preset-env` and configures it to transpile modules to `commonjs`). [Learn more](https://github.com/zeit/next.js/issues/2895).
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examples/with-mocha/mocha.setup.js
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examples/with-mocha/mocha.setup.js
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import Enzyme from 'enzyme'
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import Adapter from 'enzyme-adapter-react-16'
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Enzyme.configure({ adapter: new Adapter() })
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examples/with-mocha/package.json
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examples/with-mocha/package.json
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{
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"name": "with-mocha",
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"version": "1.0.0",
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"scripts": {
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"test": "NODE_ENV=test mocha",
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"dev": "next",
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"build": "next build",
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"start": "next start"
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},
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"dependencies": {
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"next": "latest",
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"react": "^16.5.0",
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"react-dom": "^16.5.0"
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},
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"devDependencies": {
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"@babel/core": "^7.0.1",
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"@babel/register": "^7.0.0",
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"enzyme": "^3.6.0",
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"enzyme-adapter-react-16": "^1.5.0",
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"expect.js": "^0.3.1",
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"mocha": "^5.2.0"
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}
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}
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examples/with-mocha/pages/index.js
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examples/with-mocha/pages/index.js
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export default () => (
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<div>
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<style jsx>{`
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p {
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color: red;
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}
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`}</style>
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<p>Hello World!</p>
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</div>
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)
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examples/with-mocha/test/index.test.js
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examples/with-mocha/test/index.test.js
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/* global describe, it */
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import { shallow } from 'enzyme'
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import React from 'react'
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import expect from 'expect.js'
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import App from '../pages/index.js'
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describe('With Enzyme', () => {
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it('App shows "Hello world!"', () => {
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const app = shallow(<App />)
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expect(app.find('p').text()).to.equal('Hello World!')
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})
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})
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examples/with-mocha/test/mocha.opts
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examples/with-mocha/test/mocha.opts
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--require @babel/register
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--file mocha.setup.js
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