fix(jest): resolve babel-jest error

Jest does not have proper support for setups that use both a .babelrc and .babelrc.js file as it throws babel errors when you have both. The fix must be made in babel-jest, until then we can use a fork so that atleast jest will function

lib/dependencies.json

@@ -18,7 +18,7 @@
   "awesome-typescript-loader": "^3.2.1",
   "babel-core": "^6.25.0",
   "babel-eslint": "^6.0.4",
-  "babel-jest": "^20.0.3",
+  "babel-jest": "github:JeroenVinke/babel-jest",
   "babel-loader": "^7.0.0",
   "babel-plugin-istanbul": "4.1.4",
   "babel-plugin-syntax-flow": "^6.8.0",

lib/resources/content/babelrc.webpack.js

@@ -1,25 +1,27 @@
 // this file will be used by default by babel@7 once it is released
-module.exports = {
-  "plugins": [
-    "transform-decorators-legacy",
-    "transform-class-properties"
-  ],
-  "presets": [
-    [
-      "env", {
-        "targets": process.env.BABEL_TARGET === 'node' ? {
-          "node": process.env.IN_PROTRACTOR ? '6' : 'current'
-        } : {
-          "browsers": [
-            "last 2 versions",
-            "not ie <= 11"
-          ],
-          "uglify": process.env.NODE_ENV === 'production',
-        },
-        "loose": true,
-        "modules": process.env.BABEL_TARGET === 'node' ? 'commonjs' : false,
-        "useBuiltIns": true
-      }
+module.exports = () => {
+  return {
+    "plugins": [
+      "transform-decorators-legacy",
+      "transform-class-properties"
+    ],
+    "presets": [
+      [
+        "env", {
+          "targets": process.env.BABEL_TARGET === 'node' ? {
+            "node": process.env.IN_PROTRACTOR ? '6' : 'current'
+          } : {
+            "browsers": [
+              "last 2 versions",
+              "not ie <= 11"
+            ],
+            "uglify": process.env.NODE_ENV === 'production',
+          },
+          "loose": true,
+          "modules": process.env.BABEL_TARGET === 'node' ? 'commonjs' : false,
+          "useBuiltIns": true
+        }
+      ]
     ]
-  ]
+  }
 }

lib/resources/tasks/jest.js

@@ -1,22 +1,23 @@
 import jest from 'jest-cli';
 import gutil from 'gulp-util';
-import through2 from 'through2';
 import path from 'path';
 import packageJson from '../../package.json';
 import {CLIOptions} from 'aurelia-cli';
 
 export default (cb) => {
   let options = packageJson.jest;
-  
+
   if (CLIOptions.hasFlag('watch')) {
     Object.assign(options, { watch: true});
   }
 
+  process.env.BABEL_TARGET = 'node';
+
   jest.runCLI(options, [path.resolve(__dirname, '../../')], (result) => {
-    if(result.numFailedTests || result.numFailedTestSuites) {
+    if (result.numFailedTests || result.numFailedTestSuites) {
       cb(new gutil.PluginError('gulp-jest', { message: 'Tests Failed' }));
     } else {
       cb();
     }
   });
-};
+};