[with-jest] Fix tests (#3395)

* Fix tests

* Follow linting rules

examples/with-jest/.babelrc

@@ -1,16 +1,13 @@
 {
   "env": {
     "development": {
-      "presets": "next/babel"
+      "presets": ["next/babel"]
     },
     "production": {
-      "presets": "next/babel"
+      "presets": ["next/babel"]
     },
     "test": {
-      "presets": [
-        ["env", { "modules": "commonjs" }],
-        "next/babel"
-      ]
+      "presets": [["env", { "modules": "commonjs" }], "next/babel"]
     }
   }
 }

examples/with-jest/__tests__/__snapshots__/index.test.js.snap

@@ -2,12 +2,12 @@
 
 exports[`With Snapshot Testing App shows "Hello world!" 1`] = `
 <div
-  data-jsx={2648947580}
+  className="jsx-2982525546"
 >
   <p
-    data-jsx={2648947580}
+    className="jsx-2982525546"
   >
     Hello World!
   </p>
 </div>
-`;
+`

examples/with-jest/jest.config.js

@@ -0,0 +1,4 @@
+module.exports = {
+  setupFiles: ['<rootDir>/jest.setup.js'],
+  testPathIgnorePatterns: ['<rootDir>/.next/', '<rootDir>/node_modules/']
+}

examples/with-jest/jest.setup.js

@@ -0,0 +1,5 @@
+import 'raf/polyfill'
+import { configure } from 'enzyme'
+import Adapter from 'enzyme-adapter-react-16'
+
+configure({ adapter: new Adapter() })

examples/with-jest/package.json

@@ -1,26 +1,23 @@
 {
   "name": "with-jest",
   "version": "1.0.0",
-  "jest": {
-    "setupFiles": [
-      "<rootDir>/shim.js"
-    ]
-  },
   "dependencies": {
     "next": "latest",
-    "react": "^16.0.0",
-    "react-dom": "^16.0.0"
+    "react": "16.2.0",
+    "react-dom": "16.2.0"
   },
   "devDependencies": {
-    "enzyme": "^2.8.2",
-    "jest": "^21.0.0",
-    "react-addons-test-utils": "^15.6.0",
-    "react-test-renderer": "^16.0.0"
+    "enzyme": "3.2.0",
+    "enzyme-adapter-react-16": "1.1.0",
+    "jest": "21.2.1",
+    "raf": "3.4.0",
+    "react-addons-test-utils": "15.6.2",
+    "react-test-renderer": "16.2.0"
   },
   "scripts": {
-    "test": "jest",
+    "test": "NODE_ENV=test jest",
     "dev": "next",
     "build": "next build",
     "start": "next start"
   }
-}
+}

examples/with-jest/shim.js

@@ -1,3 +0,0 @@
-global.requestAnimationFrame = callback => {
-  setTimeout(callback, 0)
-}