set up react testing (#1080)

* install mocha-webpack. also switch hark to npm version instead of github version

* well, mocha-webpack runs

* add jsdom for tests

* upgrade to webpack 2

* fix npm run test errors

* ImportDialogBox component tests

.gitignore

@@ -22,6 +22,7 @@ app/assets/javascripts/webpacked
 # Ignore all logfiles and tempfiles.
 log/*.log
 tmp
+.tmp
 
 coverage
 

frontend/src/Metamaps/GlobalUI/ImportDialog.js

@@ -26,7 +26,10 @@ const ImportDialog = {
     ReactDOM.render(React.createElement(ImportDialogBox, {
       onFileAdded: PasteInput.handleFile,
       exampleImageUrl: serverData['import-example.png'],
-      downloadScreenshot: ImportDialog.downloadScreenshot
+      downloadScreenshot: ImportDialog.downloadScreenshot,
+      onExport: format => {
+        window.open(`${window.location.pathname}/export.${format}`, '_blank')
+      }
     }), $('.importDialogWrapper').get(0))
   },
   show: function() {

frontend/src/components/ImportDialogBox.js

@@ -2,17 +2,6 @@ import React, { PropTypes, Component } from 'react'
 import Dropzone from 'react-dropzone'
 
 class ImportDialogBox extends Component {
-  constructor(props) {
-    super(props)
-
-    this.state = {
-    }
-  }
-
-  handleExport = format => () => {
-    window.open(`${window.location.pathname}/export.${format}`, '_blank')
-  }
-
   handleFile = (files, e) => {
     e.preventDefault() // prevent it from triggering the default drag-drop handler
     this.props.onFileAdded(files[0])
@@ -22,13 +11,13 @@ class ImportDialogBox extends Component {
     return (
       <div className="import-dialog">
         <h3>EXPORT</h3>
-        <div className="import-blue-button" onClick={this.handleExport('csv')}>
+        <div className="export-csv import-blue-button" onClick={this.props.onExport('csv')}>
           Export as CSV
         </div>
-        <div className="import-blue-button" onClick={this.handleExport('json')}>
+        <div className="export-json import-blue-button" onClick={this.props.onExport('json')}>
           Export as JSON
         </div>
-        <div className="import-blue-button" onClick={this.props.downloadScreenshot}>
+        <div className="download-screenshot import-blue-button" onClick={this.props.downloadScreenshot}>
           Download screenshot
         </div>
         <h3>IMPORT</h3>
@@ -46,8 +35,8 @@ class ImportDialogBox extends Component {
 
 ImportDialogBox.propTypes = {
   onFileAdded: PropTypes.func,
-  exampleImageUrl: PropTypes.string,
-  downloadScreenshot: PropTypes.func
+  downloadScreenshot: PropTypes.func,
+  onExport: PropTypes.func
 }
 
 export default ImportDialogBox

frontend/test/components/ImportDialogBox.spec.js

@@ -0,0 +1,50 @@
+/* global describe, it */
+import React from 'react'
+import TestUtils from 'react-addons-test-utils' // ES6
+import ImportDialogBox from '../../src/components/ImportDialogBox.js'
+import Dropzone from 'react-dropzone'
+import chai from 'chai'
+
+const { expect } = chai
+
+describe('ImportDialogBox', function() {
+  it('has an Export CSV button', function(done) {
+    const onExport = format => {
+      if (format === 'csv') done()
+    }
+    const detachedComp = TestUtils.renderIntoDocument(<ImportDialogBox onExport={onExport} />)
+    const button = TestUtils.findRenderedDOMComponentWithClass(detachedComp, 'export-csv')
+    const buttonNode = React.findDOMNode(button)
+    expect(button).to.exist;
+    TestUtils.Simulate.click(buttonNode)
+  })
+
+  it('has an Export JSON button', function(done) {
+    const onExport = format => {
+      if (format === 'json') done()
+    }
+    const detachedComp = TestUtils.renderIntoDocument(<ImportDialogBox onExport={onExport} />)
+    const button = TestUtils.findRenderedDOMComponentWithClass(detachedComp, 'export-json')
+    const buttonNode = React.findDOMNode(button)
+    expect(button).to.exist;
+    TestUtils.Simulate.click(buttonNode)
+  })
+
+  it('has a Download screenshot button', function(done) {
+    const downloadScreenshot = () => { done() }
+    const detachedComp = TestUtils.renderIntoDocument(<ImportDialogBox downloadScreenshot={downloadScreenshot()} />)
+    const button = TestUtils.findRenderedDOMComponentWithClass(detachedComp, 'download-screenshot')
+    const buttonNode = React.findDOMNode(button)
+    expect(button).to.exist;
+    TestUtils.Simulate.click(buttonNode)
+  })
+
+  it('has a file uploader', function(done) {
+    const uploadedFile = { file: 'mock a file' }
+    const onFileAdded = file => { if (file === uploadedFile) done() }
+    const detachedComp = TestUtils.renderIntoDocument(<ImportDialogBox onExport={() => {}} onFileAdded={onFileAdded} />)
+    const dropzone = TestUtils.findRenderedComponentWithType(detachedComp, Dropzone)
+    expect(dropzone).to.exist;
+    dropzone.props.onDropAccepted([uploadedFile], { preventDefault: () => {} })
+  })
+})

frontend/test/support/dom.js

@@ -0,0 +1,25 @@
+const jsdom = require('jsdom')
+const doc = jsdom.jsdom('<!doctype html><html><body></body></html>')
+const win = doc.defaultView
+
+global.document = doc
+global.window = win
+
+// take all properties of the window object and also attach it to the 
+// mocha global object
+propagateToGlobal(win)
+
+// from mocha-jsdom https://github.com/rstacruz/mocha-jsdom/blob/master/index.js#L80
+function propagateToGlobal (window) {
+  for (let key in window) {
+    if (!window.hasOwnProperty(key)) continue
+    if (key in global) continue
+
+    global[key] = window[key]
+  }
+}
+
+// Metamaps dependencies fixes
+global.HowlerGlobal = global.HowlerGlobal || { prototype: {} }
+global.Howl = global.Howl || { prototype: {} }
+global.Sound = global.Sound || { prototype: {} }

package.json

@@ -5,7 +5,7 @@
   "scripts": {
     "build": "webpack",
     "build:watch": "webpack --watch",
-    "test": "mocha --compilers js:babel-core/register frontend/test",
+    "test": "mocha-webpack --webpack-config webpack.test.config.js --require frontend/test/support/dom.js frontend/test",
     "eslint": "eslint frontend",
     "eslint:fix": "eslint --fix frontend"
   },
@@ -35,7 +35,7 @@
     "csv-parse": "1.1.10",
     "emoji-mart": "0.3.7",
     "getscreenmedia": "2.0.0",
-    "hark": "git://github.com/otalk/hark#342ef9b7eff2",
+    "hark": "1.1.5",
     "howler": "2.0.2",
     "jquery": "3.1.1",
     "json-loader": "0.5.4",
@@ -45,12 +45,12 @@
     "react": "15.4.2",
     "react-dom": "15.4.2",
     "react-dropzone": "3.9.1",
-    "react-onclickoutside": "^5.9.0",
+    "react-onclickoutside": "5.9.0",
     "redux": "3.6.0",
-    "riek": "^1.0.7",
+    "riek": "1.0.7",
     "simplewebrtc": "2.2.2",
     "socket.io": "1.3.7",
-    "webpack": "1.14.0"
+    "webpack": "2.2.1"
   },
   "devDependencies": {
     "babel-eslint": "^7.1.1",
@@ -61,7 +61,10 @@
     "eslint-plugin-promise": "^3.4.0",
     "eslint-plugin-react": "^6.8.0",
     "eslint-plugin-standard": "^2.0.1",
-    "mocha": "^3.2.0"
+    "jsdom": "^9.11.0",
+    "mocha": "^3.2.0",
+    "mocha-webpack": "^0.7.0",
+    "react-addons-test-utils": "^15.4.2"
   },
   "optionalDependencies": {
     "raml2html": "4.0.5"

webpack.config.js

@@ -5,8 +5,12 @@ const NODE_ENV = process.env.NODE_ENV || 'development'
 const plugins = [
   new webpack.DefinePlugin({
     "process.env.NODE_ENV": `"${NODE_ENV}"`
-  })
+  }),
+  new webpack.IgnorePlugin(/^mock-firmata$/), // work around bindings.js error
+  new webpack.ContextReplacementPlugin(/bindings$/, /^$/) // work around bindings.js error
 ]
+const externals = ["bindings"] // work around bindings.js error
+
 if (NODE_ENV === 'production') {
   plugins.push(new webpack.optimize.DedupePlugin())
   plugins.push(new webpack.optimize.UglifyJsPlugin({
@@ -26,12 +30,13 @@ const devtool = NODE_ENV === 'production' ? undefined : 'cheap-module-eval-sourc
 module.exports = {
   context: __dirname,
   plugins,
+  externals,
   devtool,
   module: {
-    preLoaders: [
-      { test: /\.json$/, loader: 'json' }
-    ],
     loaders: [
+      {
+        test: /\.json$/, loader: 'json-loader'
+      },
       {
         test: /\.(js|jsx)?$/,
         exclude: /node_modules/,

webpack.test.config.js

@@ -0,0 +1,5 @@
+const config = require('./webpack.config')
+
+config.target = 'node'
+
+module.exports = config