karma tests on all versions of react

- rewrote src/version.js in ES5 to be able to use it in karma.conf.js
- conditionally add webpack.IgnorePlugin based on React version installed, mirrorring react-compat.js

.travis.yml

@@ -10,9 +10,9 @@ before_install:
   - 'if [ "${TRAVIS_NODE_VERSION}" != "0.6" ] && [ "${TRAVIS_NODE_VERSION}" != "0.9" ]; then npm install -g npm; fi'
 before_script:
   - "sh install-relevant-react.sh"
-  - export CHROME_BIN=chromium-browser
-  - export DISPLAY=:99.0
-  - sh -e /etc/init.d/xvfb start
+  - if [ $KARMA == 1 ]; then export CHROME_BIN=chromium-browser; fi
+  - if [ $KARMA == 1 ]; then export DISPLAY=:99.0; fi
+  - if [ $KARMA == 1 ]; then sh -e /etc/init.d/xvfb start; fi
 script:
   - 'if [ -z "$REACT" ] && [ "${TRAVIS_NODE_VERSION}" = "4" ]; then npm run test:env -- "${EXAMPLE}" ; elif [ -z "$REACT" ]; then echo "Test Skipped" ; elif [ $KARMA == 1 ]; then npm run test:karma -- --single-run; elif [ "${TRAVIS_NODE_VERSION}" = "4" ]; then npm run lint && npm run travis ; elif [ "${TRAVIS_NODE_VERSION}" = "0.12" ]; then npm run travis ; else npm test ; fi'
 after_script:

karma.conf.js

@@ -1,4 +1,8 @@
-var webpack = require('webpack'); // eslint-disable-line no-var
+/* eslint-disable no-var,prefer-arrow-callback */
+
+var IgnorePlugin = require('webpack').IgnorePlugin;
+var REACT013 = require('./src/version').REACT013;
+
 
 module.exports = function karma(config) {
   config.set({
@@ -21,6 +25,8 @@ module.exports = function karma(config) {
 
     frameworks: ['mocha'],
 
+    reporters: ['dots'],
+
     files: [
       'test/*.js',
     ],
@@ -65,9 +71,17 @@ module.exports = function karma(config) {
         ],
       },
       plugins: [
-        new webpack.IgnorePlugin(/react\/lib\/ReactContext/),
-        new webpack.IgnorePlugin(/react\/lib\/ExecutionEnvironment/),
-      ],
+        /*
+        this list of conditional IgnorePlugins mirrors the conditional
+        requires in src/react-compat.js and exists to avoid error
+        output from the webpack compilation
+        */
+        !REACT013 && new IgnorePlugin(/react\/lib\/ExecutionEnvironment/),
+        !REACT013 && new IgnorePlugin(/react\/lib\/ReactContext/),
+        !REACT013 && new IgnorePlugin(/react\/addons/),
+        REACT013 && new IgnorePlugin(/react-dom/),
+        REACT013 && new IgnorePlugin(/react-addons-test-utils/),
+      ].filter(function filterPlugins(plugin) { return plugin !== false; }),
     },
 
     webpackServer: {

src/version.js

@@ -1,5 +1,12 @@
-import React from 'react';
-export const VERSION = React.version;
-export const REACT013 = VERSION.slice(0, 4) === '0.13';
-export const REACT014 = VERSION.slice(0, 4) === '0.14';
-export const REACT15 = VERSION.slice(0, 3) === '15.';
+/* eslint-disable no-var,object-shorthand */
+
+var React = require('react');
+
+var VERSION = React.version;
+
+module.exports = {
+  VERSION: VERSION,
+  REACT013: VERSION.slice(0, 4) === '0.13',
+  REACT014: VERSION.slice(0, 4) === '0.14',
+  REACT15: VERSION.slice(0, 3) === '15.',
+};