use maxWorkers=2 for tests

Author: jpavon

.circleci/config.yml

@@ -18,7 +18,7 @@ jobs:
       - checkout
       - run: npm pack
       - run: E2E_TEST='true' npx create-react-app ~/kitchensink/test-kitchensink --scripts-version=/home/circleci/kitchensink/jpavon-react-scripts-ts-0.7.0.tgz --internal-testing-template=/home/circleci/kitchensink/fixtures/kitchensink
-      - run: cd ~/kitchensink/test-kitchensink && yarn test
+      - run: cd ~/kitchensink/test-kitchensink && yarn test --maxWorkers=2
       - run: cd ~/kitchensink/test-kitchensink && yarn e2e:dev
       - run: cd ~/kitchensink/test-kitchensink && yarn e2e:build
 

fixtures/kitchensink/.babelrc

@@ -1,3 +1,2 @@
 {
-  "plugins": ["babel-plugin-transform-es2015-modules-commonjs"]
 }

fixtures/kitchensink/.template.dependencies.json

@@ -1,8 +1,5 @@
 {
   "dependencies": {
-    "@babel/plugin-transform-modules-commonjs": "7.0.0-beta.46",
-    "@babel/polyfill": "7.0.0-beta.46",
-    "@babel/register": "7.0.0-beta.46",
     "bootstrap": "4.1.0",
     "normalize.css": "7.0.0",
     "@types/prop-types": "15.5.3",

fixtures/kitchensink/src/features/syntax/AsyncAwait.js

@@ -17,16 +17,6 @@ async function load() {
   ];
 }
 
-/* eslint-disable */
-// Regression test for https://github.com/facebook/create-react-app/issues/3055
-const x = async (
-  /* prettier-ignore */
-  y: void
-) => {
-  const z = await y;
-};
-/* eslint-enable */
-
 export default class extends React.Component {
   static propTypes = {
     onReady: PropTypes.func.isRequired,

scripts/init.js

@@ -50,10 +50,10 @@ module.exports = function(
   if (process.env.E2E_TEST === 'true') {
     appPackage.scripts = {
       ...appPackage.scripts,
-      "e2e:dev:test": "TEST_URL=http://localhost:3000 jest --config=./jest.e2e.config.js",
+      "e2e:dev:test": "TEST_URL=http://localhost:3000 jest --config=./jest.e2e.config.js --maxWorkers=2",
       "e2e:dev": "start-server-and-test start http-get://localhost:3000 e2e:dev:test",
       "serve": "react-scripts-ts build && serve -s build",
-      "e2e:build:test": "TEST_URL=http://localhost:5000 jest --config=./jest.e2e.config.js",
+      "e2e:build:test": "TEST_URL=http://localhost:5000 jest --config=./jest.e2e.config.js --maxWorkers=2",
       "e2e:build": "start-server-and-test serve http://localhost:5000 e2e:build:test"
     };