Use Prettier (reduxjs#1071)

* Use Prettier

* Make sure linting and formatting are part of the testing process.

* Run prettier on existing code.

.eslintrc

@@ -3,7 +3,8 @@
   "extends": [
     "eslint:recommended",
     "plugin:import/recommended",
-    "plugin:react/recommended"
+    "plugin:react/recommended",
+    "plugin:prettier/recommended"
   ],
   "parserOptions": {
     "ecmaVersion": 6,

.prettierrc

@@ -0,0 +1,4 @@
+{
+  "semi": false,
+  "singleQuote": true
+}

.travis.yml

@@ -8,7 +8,6 @@ env:
   - REACT=16.6
 sudo: false
 script:
-  - npm run lint
-  - npm run test
+  - npm test
 after_success:
   - npm run coverage

package.json

@@ -34,8 +34,10 @@
     "build:umd:min": "cross-env NODE_ENV=production rollup -c -o dist/react-redux.min.js",
     "build": "npm run build:commonjs && npm run build:es && npm run build:umd && npm run build:umd:min",
     "clean": "rimraf lib dist es coverage",
+    "format": "prettier --write '{src,test}/**/*.js'",
     "lint": "eslint src test/utils test/components",
     "prepare": "npm run clean && npm run build",
+    "pretest": "npm run lint",
     "test": "node ./test/run-tests.js",
     "coverage": "codecov"
   },
@@ -68,12 +70,15 @@
     "cross-spawn": "^6.0.5",
     "es3ify": "^0.2.0",
     "eslint": "^4.19.1",
+    "eslint-config-prettier": "^3.1.0",
     "eslint-plugin-import": "^2.12.0",
+    "eslint-plugin-prettier": "^3.0.0",
     "eslint-plugin-react": "^7.9.1",
     "glob": "^7.1.1",
     "jest": "^23.6.0",
     "jest-dom": "^1.12.0",
     "npm-run": "^5.0.1",
+    "prettier": "1.14.3",
     "react": "^16.6.0",
     "react-dom": "^16.6.0",
     "react-testing-library": "^5.0.0",

src/components/connectAdvanced.js

@@ -86,8 +86,8 @@ export default function connectAdvanced(
       invariant(
         isValidElementType(WrappedComponent),
         `You must pass a component to the function returned by ` +
-        `${methodName}. Instead received ${JSON.stringify(WrappedComponent)}`
-      );
+          `${methodName}. Instead received ${JSON.stringify(WrappedComponent)}`
+      )
     }
 
     const wrappedComponentName =

src/connect/connect.js

@@ -29,11 +29,17 @@ function match(arg, factories, name) {
   }
 
   return (dispatch, options) => {
-    throw new Error(`Invalid value of type ${typeof arg} for ${name} argument when connecting component ${options.wrappedComponentName}.`)
+    throw new Error(
+      `Invalid value of type ${typeof arg} for ${name} argument when connecting component ${
+        options.wrappedComponentName
+      }.`
+    )
   }
 }
 
-function strictEqual(a, b) { return a === b }
+function strictEqual(a, b) {
+  return a === b
+}
 
 // createConnect with default args builds the 'official' connect behavior. Calling it with
 // different options opens up some testing and extensibility scenarios
@@ -57,15 +63,23 @@ export function createConnect({
       ...extraOptions
     } = {}
   ) {
-    const initMapStateToProps = match(mapStateToProps, mapStateToPropsFactories, 'mapStateToProps')
-    const initMapDispatchToProps = match(mapDispatchToProps, mapDispatchToPropsFactories, 'mapDispatchToProps')
+    const initMapStateToProps = match(
+      mapStateToProps,
+      mapStateToPropsFactories,
+      'mapStateToProps'
+    )
+    const initMapDispatchToProps = match(
+      mapDispatchToProps,
+      mapDispatchToPropsFactories,
+      'mapDispatchToProps'
+    )
     const initMergeProps = match(mergeProps, mergePropsFactories, 'mergeProps')
 
     return connectHOC(selectorFactory, {
       // used in error messages
       methodName: 'connect',
 
-       // used to compute Connect's displayName from the wrapped component's displayName.
+      // used to compute Connect's displayName from the wrapped component's displayName.
       getDisplayName: name => `Connect(${name})`,
 
       // if mapStateToProps is falsy, the Connect component doesn't subscribe to store state changes

src/connect/mapDispatchToProps.js

@@ -2,20 +2,22 @@ import { bindActionCreators } from 'redux'
 import { wrapMapToPropsConstant, wrapMapToPropsFunc } from './wrapMapToProps'
 
 export function whenMapDispatchToPropsIsFunction(mapDispatchToProps) {
-  return (typeof mapDispatchToProps === 'function')
+  return typeof mapDispatchToProps === 'function'
     ? wrapMapToPropsFunc(mapDispatchToProps, 'mapDispatchToProps')
     : undefined
 }
 
 export function whenMapDispatchToPropsIsMissing(mapDispatchToProps) {
-  return (!mapDispatchToProps)
+  return !mapDispatchToProps
     ? wrapMapToPropsConstant(dispatch => ({ dispatch }))
     : undefined
 }
 
 export function whenMapDispatchToPropsIsObject(mapDispatchToProps) {
-  return (mapDispatchToProps && typeof mapDispatchToProps === 'object')
-    ? wrapMapToPropsConstant(dispatch => bindActionCreators(mapDispatchToProps, dispatch))
+  return mapDispatchToProps && typeof mapDispatchToProps === 'object'
+    ? wrapMapToPropsConstant(dispatch =>
+        bindActionCreators(mapDispatchToProps, dispatch)
+      )
     : undefined
 }
 

src/connect/mapStateToProps.js

@@ -1,18 +1,13 @@
 import { wrapMapToPropsConstant, wrapMapToPropsFunc } from './wrapMapToProps'
 
 export function whenMapStateToPropsIsFunction(mapStateToProps) {
-  return (typeof mapStateToProps === 'function')
+  return typeof mapStateToProps === 'function'
     ? wrapMapToPropsFunc(mapStateToProps, 'mapStateToProps')
     : undefined
 }
 
 export function whenMapStateToPropsIsMissing(mapStateToProps) {
-  return (!mapStateToProps)
-    ? wrapMapToPropsConstant(() => ({}))
-    : undefined
+  return !mapStateToProps ? wrapMapToPropsConstant(() => ({})) : undefined
 }
 
-export default [
-  whenMapStateToPropsIsFunction,
-  whenMapStateToPropsIsMissing
-]
+export default [whenMapStateToPropsIsFunction, whenMapStateToPropsIsMissing]

src/connect/mergeProps.js

@@ -6,7 +6,8 @@ export function defaultMergeProps(stateProps, dispatchProps, ownProps) {
 
 export function wrapMergePropsFunc(mergeProps) {
   return function initMergePropsProxy(
-    dispatch, { displayName, pure, areMergedPropsEqual }
+    dispatch,
+    { displayName, pure, areMergedPropsEqual }
   ) {
     let hasRunOnce = false
     let mergedProps
@@ -17,7 +18,6 @@ export function wrapMergePropsFunc(mergeProps) {
       if (hasRunOnce) {
         if (!pure || !areMergedPropsEqual(nextMergedProps, mergedProps))
           mergedProps = nextMergedProps
-
       } else {
         hasRunOnce = true
         mergedProps = nextMergedProps
@@ -32,18 +32,13 @@ export function wrapMergePropsFunc(mergeProps) {
 }
 
 export function whenMergePropsIsFunction(mergeProps) {
-  return (typeof mergeProps === 'function')
+  return typeof mergeProps === 'function'
     ? wrapMergePropsFunc(mergeProps)
     : undefined
 }
 
 export function whenMergePropsIsOmitted(mergeProps) {
-  return (!mergeProps)
-    ? () => defaultMergeProps
-    : undefined
+  return !mergeProps ? () => defaultMergeProps : undefined
 }
 
-export default [
-  whenMergePropsIsFunction,
-  whenMergePropsIsOmitted
-]
+export default [whenMergePropsIsFunction, whenMergePropsIsOmitted]

src/connect/selectorFactory.js

@@ -97,18 +97,21 @@ export function pureFinalPropsSelectorFactory(
 // props have not changed. If false, the selector will always return a new
 // object and shouldComponentUpdate will always return true.
 
-export default function finalPropsSelectorFactory(dispatch, {
-  initMapStateToProps,
-  initMapDispatchToProps,
-  initMergeProps,
-  ...options
-}) {
+export default function finalPropsSelectorFactory(
+  dispatch,
+  { initMapStateToProps, initMapDispatchToProps, initMergeProps, ...options }
+) {
   const mapStateToProps = initMapStateToProps(dispatch, options)
   const mapDispatchToProps = initMapDispatchToProps(dispatch, options)
   const mergeProps = initMergeProps(dispatch, options)
 
   if (process.env.NODE_ENV !== 'production') {
-    verifySubselectors(mapStateToProps, mapDispatchToProps, mergeProps, options.displayName)
+    verifySubselectors(
+      mapStateToProps,
+      mapDispatchToProps,
+      mergeProps,
+      options.displayName
+    )
   }
 
   const selectorFactory = options.pure

src/connect/verifySubselectors.js

@@ -3,8 +3,10 @@ import warning from '../utils/warning'
 function verify(selector, methodName, displayName) {
   if (!selector) {
     throw new Error(`Unexpected value for ${methodName} in ${displayName}.`)
-
-  } else if (methodName === 'mapStateToProps' || methodName === 'mapDispatchToProps') {
+  } else if (
+    methodName === 'mapStateToProps' ||
+    methodName === 'mapDispatchToProps'
+  ) {
     if (!selector.hasOwnProperty('dependsOnOwnProps')) {
       warning(
         `The selector for ${methodName} of ${displayName} did not specify a value for dependsOnOwnProps.`
@@ -13,7 +15,12 @@ function verify(selector, methodName, displayName) {
   }
 }
 
-export default function verifySubselectors(mapStateToProps, mapDispatchToProps, mergeProps, displayName) {
+export default function verifySubselectors(
+  mapStateToProps,
+  mapDispatchToProps,
+  mergeProps,
+  displayName
+) {
   verify(mapStateToProps, 'mapStateToProps', displayName)
   verify(mapDispatchToProps, 'mapDispatchToProps', displayName)
   verify(mergeProps, 'mergeProps', displayName)