chore: enable optional chaining and nullish (#306)

.babelrc

@@ -1,4 +1,8 @@
 {
   "presets": [["@verdaccio"]],
-  "plugins": ["emotion"]
+  "plugins": [
+    "emotion",
+    "@babel/plugin-proposal-optional-chaining",
+    "@babel/plugin-proposal-nullish-coalescing-operator"
+  ]
 }

.yarnrc

@@ -1 +1,2 @@
 save-prefix ""
+registry "https://registry.verdaccio.org"

package.json

@@ -13,6 +13,8 @@
   "homepage": "https://verdaccio.org",
   "main": "index.js",
   "devDependencies": {
+    "@babel/plugin-proposal-nullish-coalescing-operator": "7.7.4",
+    "@babel/plugin-proposal-optional-chaining": "7.7.4",
     "@commitlint/cli": "8.2.0",
     "@commitlint/config-conventional": "8.2.0",
     "@emotion/core": "10.0.22",
@@ -35,10 +37,10 @@
     "@types/validator": "12.0.0",
     "@types/webpack-env": "1.14.1",
     "@typescript-eslint/parser": "2.8.0",
-    "@verdaccio/babel-preset": "8.2.0",
-    "@verdaccio/commons-api": "8.3.0",
-    "@verdaccio/eslint-config": "8.2.0",
-    "@verdaccio/types": "8.3.0",
+    "@verdaccio/babel-preset": "8.4.2",
+    "@verdaccio/commons-api": "8.4.2",
+    "@verdaccio/eslint-config": "8.4.2",
+    "@verdaccio/types": "8.4.2",
     "autosuggest-highlight": "3.1.1",
     "babel-loader": "8.0.6",
     "bundlesize": "0.18.0",
@@ -54,14 +56,14 @@
     "enzyme": "3.10.0",
     "enzyme-adapter-react-16": "1.15.1",
     "enzyme-to-json": "3.4.3",
-    "eslint": "6.6.0",
+    "eslint": "6.7.0",
     "eslint-plugin-codeceptjs": "1.2.0",
     "eslint-plugin-import": "2.18.2",
     "eslint-plugin-jsx-a11y": "6.2.3",
     "eslint-plugin-prettier": "3.1.1",
     "eslint-plugin-react": "7.16.0",
     "eslint-plugin-react-hooks": "2.3.0",
-    "eslint-plugin-verdaccio": "8.2.0",
+    "eslint-plugin-verdaccio": "8.4.2",
     "file-loader": "4.3.0",
     "friendly-errors-webpack-plugin": "1.7.0",
     "get-stdin": "7.0.0",
@@ -113,8 +115,8 @@
     "url-loader": "2.3.0",
     "validator": "12.1.0",
     "verdaccio": "4.3.5",
-    "verdaccio-auth-memory": "8.3.0",
-    "verdaccio-memory": "8.3.0",
+    "verdaccio-auth-memory": "8.4.2",
+    "verdaccio-memory": "8.4.2",
     "wait-on": "3.3.0",
     "webpack": "4.41.2",
     "webpack-bundle-analyzer": "3.6.0",

src/App/App.test.tsx

@@ -3,6 +3,7 @@ import { ReactWrapper } from 'enzyme';
 
 import { mount } from '../utils/test-enzyme';
 import storage from '../utils/storage';
+// eslint-disable-next-line jest/no-mocks-import
 import { generateTokenWithTimeRange } from '../../jest/unit/components/__mocks__/token';
 
 import App from './App';
@@ -31,6 +32,7 @@ jest.mock('../utils/storage', () => {
 });
 
 jest.mock('../utils/api', () => ({
+  // eslint-disable-next-line jest/no-mocks-import
   request: require('../../jest/unit/components/__mocks__/api').default.request,
 }));
 

src/components/Engines/Engines.tsx

@@ -13,7 +13,7 @@ import node from './img/node.png';
 const Engine: React.FC = () => {
   const { packageMeta } = useContext(DetailContext);
 
-  const engines = packageMeta && packageMeta.latest && packageMeta.latest.engines;
+  const engines = packageMeta?.latest?.engines;
 
   if (!engines || (!engines.node && !engines.npm)) {
     return null;

src/utils/login.test.ts

@@ -1,3 +1,4 @@
+// eslint-disable-next-line jest/no-mocks-import
 import {
   generateTokenWithTimeRange,
   generateTokenWithExpirationAsString,
@@ -11,6 +12,7 @@ import { isTokenExpire, makeLogin } from './login';
 console.error = jest.fn();
 
 jest.mock('./api', () => ({
+  // eslint-disable-next-line jest/no-mocks-import
   request: require('../../jest/unit/components/__mocks__/api').default.request,
 }));
 
@@ -40,11 +42,8 @@ describe('isTokenExpire', (): void => {
 
   test('isTokenExpire - token is not a valid json token', (): void => {
     const token = generateInvalidToken();
-    const result = [
-      'Invalid token:',
-      new SyntaxError('Unexpected token i in JSON at position 0'),
-      'xxxxxx.aW52YWxpZHRva2Vu.xxxxxx',
-    ];
+    const errorToken = new SyntaxError('Unexpected token i in JSON at position 0');
+    const result = ['Invalid token:', errorToken, 'xxxxxx.aW52YWxpZHRva2Vu.xxxxxx'];
     expect(isTokenExpire(token)).toBeTruthy();
     expect(console.error).toHaveBeenCalledWith(...result);
   });