Add yarn test command (Jest)

.fixtures/test-app-ts/src/components/App.tsx

@@ -1,11 +1,15 @@
 import React from 'react'
 import { observer } from 'mobx-react'
-import { ReactComponent as Logo } from 'images/logo.svg'
 // test packages written for newer node version
 import ky from 'ky'
-import mmm from 'images/mmmpiselli.jpg'
+import { ReactComponent as Logo } from '../images/logo.svg'
+import mmm from '../images/mmmpiselli.jpg'
 import styles from './App.module.css'
 
+export function firstDayOfYear(year: number): Date {
+  return new Date(Date.UTC(year, 0, 1))
+}
+
 // test decorators
 @observer
 export class App extends React.Component {

.fixtures/test-app/src/components/App.js

@@ -4,10 +4,14 @@ import { observer } from 'mobx-react'
 import mapboxgl from 'mapbox-gl'
 // test packages written for newer node version
 import ky from 'ky'
-import { ReactComponent as Logo } from 'images/logo.svg'
-import mmm from 'images/mmmpiselli.jpg'
+import { ReactComponent as Logo } from '../images/logo.svg'
+import mmm from '../images/mmmpiselli.jpg'
 import styles from './App.module.css'
 
+export function firstDayOfYear(year) {
+  return new Date(Date.UTC(year, 0, 1))
+}
+
 // test decorators
 @observer
 export class App extends React.Component {

.fixtures/test-app/src/components/App.test.js

@@ -0,0 +1,8 @@
+
+import { firstDayOfYear } from './App'
+
+describe(firstDayOfYear, () => {
+  it('should return Jan 1st of the year (UTC)', () => {
+    expect(firstDayOfYear(2019).toISOString()).toBe('2019-01-01T00:00:00.000Z')
+  })
+})

README.md

@@ -41,6 +41,7 @@ but significant amounts of code were rewritten and simplified. Here are some shi
   - [How do I use a service worker?](#faq)
   - [I need title and meta tags for each route for SEO. How do I do it?](#faq)
   - [I need to build for Electron. How do I do it?](#faq)
+  - [How do I configure a multi-project repo?](#faq)
 - [Contributing](#contributing)
 
 ## Creating a new project
@@ -78,6 +79,7 @@ These are the available commands once you created a project:
 - `yarn start` starts a server locally, accessible both from your browser and from another machine using your same wi-fi
 - `yarn start --exposed` starts a server locally and exposes it to the internet, accessible from everyone having the link, kinda like ngrok, but works only if you have an accurat ssh key. The link created looks like `{branch}.{repo}.internal.accurat.io` if you're in a branch, or `{repo}.internal.accurat.io` if you're on master. It uses a server with an instance of [SSH-Tuna](https://github.com/accurat/ssh-tuna) to achieve this.
 - `yarn build` builds the project for production, ready to be deployed from the `build/` folder
+- `yarn test` runs [jest](https://jestjs.io/en/). By default (if you're not in a CI) it runs in watch mode, but you can disable watch mode by passing `--watch=false`. You can also pass any other argument you would pass to jest, for example `yarn test --updateSnapshot` updates your snapshots.
 - `yarn lint` lints with eslint the `src/` folder. You can pass any [eslint options](https://eslint.org/docs/user-guide/command-line-interface#options) to the lint command, for example if you want to use eslint's fix option, you do it like this:
 ```json
 "lint-fix": "accurapp-scripts lint --fix",
@@ -276,12 +278,13 @@ new Date(Number(process.env.LATEST_COMMIT_TIMESTAMP))
 ├── .babelrc
 ├── .env.example
 ├── .eslintrc
+├── .gitignore
 ├── .prettierignore
 ├── .prettierrc
-├── .gitignore
+├── jest.config.js
 ├── netlify.toml
-├── README.md
 ├── package.json
+├── README.md
 ├── webpack.config.js
 └── yarn.lock
 ```
@@ -736,6 +739,30 @@ Please, see [`@joshbuchea`'s head repo](https://gethead.info/).
 [This guide](https://gist.github.com/matthewjberger/6f42452cb1a2253667942d333ff53404) is a good one to follow, and [here is a working example](https://github.com/nkint/accurapp-electron) of accurapp with electron. Good luck!
 </details>
 
+
+<details>
+<summary>How do I configure a multi-project repo?</summary>
+
+Your best bet is to use [yarn workspaces](https://yarnpkg.com/lang/en/docs/workspaces/). It will solve you a lot of headaches.
+
+This is an example `package.json`, assuming that your multiple projects are in a subfolder called `projects`.
+
+```json
+{
+  "name": "main-project-name",
+  "private": true,
+  "workspaces": [
+    "projects/*"
+  ]
+}
+```
+
+Yarn workspaces basically puts your dependencies in just one place, at the root.
+
+This approach allows you to require files across projects really easily. It is advised not to make a new project containing only the shared files, but rather choose a project to be the source of thruth, containing every image or UI components.
+
+</details>
+
 ## Contributing
 If you make some edits and wish to test them locally you can run `yarn test` for an end-to-end test, or `yarn create-test-app` which creates a test app using the local packages.
 

package.json

@@ -6,8 +6,9 @@
     "lint": "node node_modules/eslint/bin/eslint.js packages",
     "test": "./test/e2e.sh",
     "create-test-app": "./test/create-test-app.sh",
-    "create-test-app-build": "(yarn create-test-app && cd test-app/ && yarn build)",
     "create-test-app-start": "(yarn create-test-app && cd test-app/ && BROWSER=false yarn start --exposed)",
+    "create-test-app-build": "(yarn create-test-app && cd test-app/ && yarn build)",
+    "create-test-app-test": "(yarn create-test-app && cd test-app/ && yarn test --watch=false)",
     "publish": "is-git-status-clean && lerna publish --conventional-commits --message 'chore: 🚀 Publish'"
   },
   "husky": {

packages/accurapp-scripts/bin/scripts.js

@@ -24,6 +24,7 @@ if (!process.env.CI) {
     require('../package.json'),
     require('../../babel-preset-accurapp/package.json'),
     require('../../eslint-config-accurapp/package.json'),
+    require('../../jest-config-accurapp/package.json'),
     require('../../webpack-preset-accurapp/package.json'),
   ]
 

packages/accurapp-scripts/package.json

@@ -46,7 +46,7 @@
     "react-dev-utils": "9.0.1",
     "resolve": "1.11.0",
     "semver": "6.1.1",
-    "ssh-tuna": "^1.0.3",
+    "ssh-tuna": "1.0.3",
     "webpack": "4.34.0",
     "webpack-dev-server": "3.2.1"
   }

packages/accurapp-scripts/scripts/test.js

@@ -0,0 +1,22 @@
+require('dotenv').config() // gives precedence to the env variables already present
+process.env.NODE_ENV = 'test'
+process.env.PUBLIC_URL = ''
+
+const path = require('path')
+const jest = require('jest')
+const { isInGitRepository } = require('../utils/git-utils')
+
+const argv = process.argv.slice(2)
+
+// Watch unless on CI or explicitly specified not tos
+if (!process.env.CI && !argv.includes('--watch=false')) {
+  // --watch needs a git repository because it runs only the edited test
+  argv.push(isInGitRepository() ? '--watch' : '--watchAll')
+}
+
+// Load the config
+const appDir = process.cwd()
+const appJestConfig = path.resolve(appDir, 'jest.config.js')
+argv.push('--config', JSON.stringify(appJestConfig))
+
+jest.run(argv)

packages/accurapp-scripts/utils/git-utils.js

@@ -62,11 +62,21 @@ function extractRepoName() {
   }
 }
 
+function isInGitRepository() {
+  try {
+    cp.execSync('git rev-parse --is-inside-work-tree', { stdio: 'ignore' })
+    return true
+  } catch (e) {
+    return false
+  }
+}
+
 module.exports = {
   extractBrowserslistString,
   extractLatestCommitHash,
   extractLatestCommitTimestamp,
   extractLatestTag,
   extractCurrentBranch,
   extractRepoName,
+  isInGitRepository,
 }

packages/accurapp-scripts/utils/verifyTypeScriptSetup.js

@@ -65,7 +65,7 @@ function verifyTypeScriptSetup(appDir, { shouldInstall = true } = {}) {
   if (shouldInstall) {
     if (!appPkg.devDependencies.typescript && !appPkg.dependencies.typescript) {
       log.ok(`Installing latest version of typescript`)
-      exec('yarn add --dev typescript @types/node @types/webpack-env', appDir)
+      exec('yarn add --dev typescript @types/node @types/webpack-env @types/jest', appDir)
       exec('yarn add @types/react @types/react-dom @types/lodash', appDir)
     }
   }

packages/babel-preset-accurapp/index.js

@@ -1,14 +1,19 @@
 module.exports = (context, opts = {}) => {
   const env = process.env.BABEL_ENV || process.env.NODE_ENV
   const isDevelopment = env === 'development'
+  const isTest = env === 'test'
   const useTypescript = opts.typescript
 
   return {
     presets: [
       // Browsers are taken from the browserslist field in package.json
       [
         require('@babel/preset-env').default,
-        {
+        isTest ? {
+          targets: {
+            node: 'current',
+          },
+        } : {
           modules: false,
           useBuiltIns: 'usage',
           // Enable stage 4 proposals, like array.flatMap
@@ -22,7 +27,7 @@ module.exports = (context, opts = {}) => {
         {
           // Adds component stack to warning messages
           // Adds __self attribute to JSX which React will use for some warnings
-          development: isDevelopment,
+          development: isDevelopment || isTest,
           // Will use the native built-in instead of trying to polyfill
           // behavior for any plugins that require one.
           useBuiltIns: true,
@@ -60,6 +65,9 @@ module.exports = (context, opts = {}) => {
       // See discussion in https://github.com/facebook/create-react-app/issues/4263
       [require('@babel/plugin-proposal-class-properties').default, { loose: true }],
       require('@babel/plugin-proposal-json-strings').default,
+
+      // Transform dynamic import to require
+      ...(isTest ? [require('babel-plugin-dynamic-import-node')] : []),
     ],
   }
 }

packages/babel-preset-accurapp/package.json

@@ -38,9 +38,10 @@
     "@babel/preset-env": "7.4.5",
     "@babel/preset-react": "7.0.0",
     "@babel/preset-typescript": "7.3.3",
+    "babel-plugin-dynamic-import-node": "2.3.0",
     "babel-plugin-lodash": "3.3.4",
     "babel-plugin-macros": "2.6.1",
     "core-js": "3.0.1",
-    "regenerator-runtime": "^0.13.2"
+    "regenerator-runtime": "0.13.3"
   }
 }

packages/create-accurapp/index.js

@@ -90,6 +90,7 @@ const packageJson = {
   scripts: {
     start: 'accurapp-scripts start',
     build: 'accurapp-scripts build',
+    test: 'accurapp-scripts test',
     lint: 'accurapp-scripts lint',
     prettier: 'accurapp-scripts prettier',
   },
@@ -133,10 +134,11 @@ if (shouldInstall) {
 
   let devDependencies = [
     'accurapp-scripts',
-    'webpack-preset-accurapp',
-    'eslint-config-accurapp',
     'babel-preset-accurapp',
-    ...(useTypescript ? ['typescript', '@types/node', '@types/webpack-env'] : []),
+    'eslint-config-accurapp',
+    'jest-config-accurapp',
+    'webpack-preset-accurapp',
+    ...(useTypescript ? ['typescript', '@types/node', '@types/webpack-env', '@types/jest'] : []),
   ]
 
   // Require local package if we're testing.

packages/create-accurapp/template/jest.config.js

@@ -0,0 +1,5 @@
+const accurappConfig = require('jest-config-accurapp')
+
+module.exports = {
+  ...accurappConfig,
+}

packages/eslint-config-accurapp/index.js

@@ -52,6 +52,7 @@ module.exports = {
     es6: true,
     browser: true,
     node: true,
+    jest: true,
   },
 
   globals: {

packages/jest-config-accurapp/README.md

@@ -0,0 +1,5 @@
+# jest-config-accurapp
+
+This package includes the Jest configuration used by Accurapp.
+
+[For more info, checkout out the main documentation.](https://github.com/accurat/accurapp)

packages/jest-config-accurapp/babelTransform.js

@@ -0,0 +1,20 @@
+const fs = require('fs')
+const babelJest = require('babel-jest')
+
+const appDir = process.cwd()
+const useTypescript = fs.existsSync(`${appDir}/tsconfig.json`)
+const babelrc = JSON.parse(fs.readFileSync(`${appDir}/.babelrc`))
+
+// Inject the typescript option
+if (useTypescript) {
+  babelrc.presets = [
+    ...babelrc.presets.filter(p => p !== 'accurapp'),
+    ['accurapp', { typescript: true }],
+  ]
+}
+
+module.exports = babelJest.createTransformer({
+  ...babelrc,
+  babelrc: false,
+  configFile: false,
+})

packages/jest-config-accurapp/index.js

@@ -0,0 +1,38 @@
+module.exports = {
+  // Use newer version of jsdom
+  testEnvironment: 'jest-environment-jsdom-fifteen',
+
+  setupFiles: [
+    // It contains some polyfills such as the isomorphic fetch
+    'react-app-polyfill/jsdom',
+    'jest-config-accurapp/setup',
+  ],
+
+  transform: {
+    // Wrapper around babel-jest
+    '\\.(js|jsx|ts|tsx)$': 'jest-config-accurapp/babelTransform',
+
+    // Transform simple css files in an empty object
+    // https://jestjs.io/docs/en/webpack.html
+    '\\.css$': 'react-scripts/config/jest/cssTransform',
+
+    // Transform all other files into just the filename string
+    '^(?!.*\\.(js|jsx|ts|tsx|css|json)$)': 'react-scripts/config/jest/fileTransform',
+  },
+
+  // Don't transform css modules into an empty object
+  transformIgnorePatterns: [
+    '\\.module\\.(css)$',
+  ],
+
+  // Instead use identity-obj-proxy which outputs the classnames
+  moduleNameMapper: {
+    '\\.module\\.(css)$': 'identity-obj-proxy',
+  },
+
+  watchPlugins: [
+    // Filter your tests by file name or test name
+    'jest-watch-typeahead/filename',
+    'jest-watch-typeahead/testname',
+  ],
+}

packages/jest-config-accurapp/package.json

@@ -0,0 +1,30 @@
+{
+  "name": "jest-config-accurapp",
+  "version": "4.0.0",
+  "description": "Jest configuration used by Accurat",
+  "repository": "accurat/accurapp",
+  "license": "MIT",
+  "keywords": [
+    "jest",
+    "config",
+    "accurapp",
+    "accurat"
+  ],
+  "engines": {
+    "node": ">=8.6",
+    "yarn": ">=1.2.1"
+  },
+  "files": [
+    "index.js"
+  ],
+  "dependencies": {
+    "@babel/core": "7.4.5",
+    "babel-jest": "24.9.0",
+    "identity-obj-proxy": "3.0.0",
+    "jest": "24.9.0",
+    "jest-environment-jsdom-fifteen": "1.0.2",
+    "jest-watch-typeahead": "0.4.2",
+    "react-app-polyfill": "1.0.5",
+    "react-scripts": "3.3.0"
+  }
+}

packages/jest-config-accurapp/setup.js

@@ -0,0 +1,6 @@
+// TODO remove this when it will be integrated in jsdom
+// https://github.com/jsdom/jsdom/issues/1721
+function noop() { }
+if (typeof window.URL.createObjectURL === 'undefined') {
+  Object.defineProperty(window.URL, 'createObjectURL', { value: noop })
+}