Configuring Jest Test framework with webpack 4 and Babel 7

config/webpack.config.test.js

@@ -0,0 +1 @@
+import '@babel/polyfill';

package.json

@@ -40,6 +40,7 @@
     "fs-extra": "^5.0.0",
     "html-loader": "^0.5.5",
     "html-webpack-plugin": "^3.0.4",
+    "jest": "^22.4.2",
     "json-loader": "^0.5.7",
     "postcss-loader": "^2.1.1",
     "postcss-simple-vars": "^4.1.0",
@@ -62,5 +63,38 @@
     "material-ui": "^1.0.0-beta.35",
     "material-ui-icons": "^1.0.0-beta.35",
     "react-final-form": "^3.1.2"
+  },
+  "jest": {
+    "collectCoverageFrom": [
+      "src/**/*.{js,jsx}"
+    ],
+    "setupFiles": [
+      "<rootDir>/config/webpack.config.test.js",
+      "<rootDir>/config/polyfills.js"
+    ],
+    "testMatch": [
+      "<rootDir>/src/**/__tests__/**/*.js?(x)",
+      "<rootDir>/src/**/?(*.)(spec|test).js?(x)"
+    ],
+    "testEnvironment": "node",
+    "testURL": "http://localhost",
+    "transform": {
+      "^.+\\.(js|jsx)$": "<rootDir>/node_modules/babel-jest",
+      "^.+\\.(css|scss)$": "<rootDir>/config/jest/cssTransform.js",
+      "^(?!.*\\.(js|jsx|css|json)$)": "<rootDir>/config/jest/fileTransform.js"
+    },
+    "transformIgnorePatterns": [
+      "[/\\\\]node_modules[/\\\\].+\\.(js|jsx)$"
+    ],
+    "moduleNameMapper": {
+      "^react-native$": "react-native-web"
+    },
+    "moduleFileExtensions": [
+      "web.js",
+      "js",
+      "json",
+      "web.jsx",
+      "jsx"
+    ]
   }
 }

scripts/test.js

@@ -15,17 +15,4 @@ if (!process.env.CI && argv.indexOf('--coverage') < 0) {
   argv.push('--watch');
 }
 
-// A temporary hack to clear terminal correctly.
-// You can remove this after updating to Jest 18 when it's out.
-// https://github.com/facebook/jest/pull/2230
-var realWrite = process.stdout.write;
-var CLEAR = process.platform === 'win32' ? '\x1Bc' : '\x1B[2J\x1B[3J\x1B[H';
-process.stdout.write = function(chunk, encoding, callback) {
-  if (chunk === '\x1B[2J\x1B[H') {
-    chunk = CLEAR;
-  }
-  return realWrite.call(this, chunk, encoding, callback);
-};
-
-
 jest.run(argv);