add jest and enzyme testing dependencies and update infrastructure configuration to make testing work

.eslintrc

@@ -9,7 +9,7 @@
     }
   },
   "extends": [
-    "airbnb",
+    "airbnb"
   ],
   "settings": {
     "react": {
@@ -18,22 +18,24 @@
   },
   "env": {
     "browser": true,
-    "node": true
+    "node": true,
+    "jest": true
   },
   "globals": {
-    "window": true,
+    "window": true
   },
   "rules": {
     "camelcase": "off",
     "arrow-parens": "off",
-    "comma-dangle": "off",    
+    "comma-dangle": "off",
+    "import/no-extraneous-dependencies": ["error", { "devDependencies": true }],
     "indent": ["error", 2, {
       "SwitchCase": 1
     }],
-    "max-len": ['error', {
+    "max-len": ["error", {
       "code": 100,
       "ignoreStrings": true,
-      "ignoreTemplateLiterals": true,
+      "ignoreTemplateLiterals": true
     }],
     "no-continue": "off",
     "no-debugger": "off",
@@ -42,7 +44,7 @@
     "no-plusplus": "off",
     "no-underscore-dangle": "off",
     "no-use-before-define": "off",
-    "no-multiple-empty-lines": ["error", { max: 1 }],
+    "no-multiple-empty-lines": ["error", { "max": 1 }],
     "object-curly-newline": "off",
     "space-before-function-paren": ["error", "always"],
     "no-trailing-spaces": ["error"],

__tests__/stubs/svgStub.js

@@ -0,0 +1 @@
+module.exports = 'svg-stub';

enzyme.config.js

@@ -0,0 +1,4 @@
+const enzyme = require('enzyme');
+const Adapter = require('enzyme-adapter-react-16');
+
+enzyme.configure({ adapter: new Adapter() });

package.json

@@ -5,7 +5,7 @@
   "main": "index.js",
   "scripts": {
     "start": "webpack-dev-server --config ./webpack.config.js --mode development",
-    "test": "echo \"No test specified\" && exit 0",
+    "test": "jest --watchAll",
     "lint": "./node_modules/eslint/bin/eslint.js src/**/*.js src/**/*.jsx"
   },
   "keywords": [],
@@ -14,16 +14,20 @@
   "devDependencies": {
     "babel-core": "^6.26.3",
     "babel-eslint": "^10.0.0",
+    "babel-jest": "^23.6.0",
     "babel-loader": "^7.1.5",
     "babel-preset-react": "^6.24.1",
     "babel-preset-stage-2": "^6.24.1",
     "css-loader": "^1.0.0",
+    "enzyme": "^3.7.0",
+    "enzyme-adapter-react-16": "^1.6.0",
     "eslint": "^5.6.0",
     "eslint-config-airbnb": "^17.1.0",
     "eslint-plugin-import": "^2.14.0",
     "eslint-plugin-jsx-a11y": "^6.1.1",
     "eslint-plugin-react": "^7.11.1",
     "file-loader": "^2.0.0",
+    "jest": "^23.6.0",
     "node-sass": "^4.9.3",
     "react-hot-loader": "^4.3.3",
     "sass-loader": "^7.1.0",
@@ -42,5 +46,30 @@
     "react-redux": "^5.0.7",
     "react-router-dom": "^4.3.1",
     "redux": "^4.0.0"
+  },
+  "jest": {
+    "collectCoverageFrom": [
+      "src/**/*.{js,jsx}"
+    ],
+    "moduleNameMapper": {
+      "^[./a-zA-Z0-9$_-]+\\.svg$": "<rootDir>/__tests__/stubs/svgStub.js"
+    },
+    "setupTestFrameworkScriptFile": "<rootDir>/enzyme.config.js",
+    "testMatch": [
+      "<rootDir>/__tests__/tests/**/*.{js,jsx}"
+    ],
+    "testEnvironment": "jsdom",
+    "testURL": "http://127.0.0.1:3001",
+    "transform": {
+      "^.+\\.(js|jsx)$": "<rootDir>/node_modules/babel-jest"
+    },
+    "transformIgnorePatterns": [
+      "[/\\\\]node_modules[/\\\\].+\\.(js|jsx)$"
+    ]
+  },
+  "babel": {
+    "presets": [
+      "react-app"
+    ]
   }
 }

webpack.config.js

@@ -1,4 +1,5 @@
 const webpack = require('webpack');
+
 const TARGET_PORT = 8043;
 const TARGET = `https://localhost:${TARGET_PORT}`;