[Tooling] Transpile tests targeting Node, not browser (#700)

* transplite tests for higher target

* fix test

* add to lint-stagged too

.babelrc

@@ -1,3 +1,17 @@
 {
-  "presets": [["@babel/preset-env", { "loose": true }]]
+  "presets": [["@babel/preset-env", { "loose": true }]],
+  "env": {
+    "test": {
+      "presets": [
+        [
+          "@babel/preset-env",
+          {
+            "targets": {
+              "node": true
+            }
+          }
+        ]
+      ]
+    }
+  }
 }

lint-staged.config.js

@@ -10,5 +10,5 @@ module.exports = {
   ],
   '.codecov.yml': () =>
     'curl -f --silent --data-binary @.codecov.yml https://codecov.io/validate',
-  'src/scripts/**/*.js': () => 'mocha',
+  'src/scripts/**/*.js': () => 'npm run test:unit',
 };

package.json

@@ -8,14 +8,14 @@
     "start": "run-p js:watch css:watch",
     "build": "run-p js:build css:build",
     "lint": "eslint src/scripts",
-    "coverage": "nyc --reporter=lcov --reporter=text --reporter=text-summary mocha",
+    "coverage": "NODE_ENV=test nyc --reporter=lcov --reporter=text --reporter=text-summary mocha",
     "bundlesize": "bundlesize",
     "cypress:run": "$(npm bin)/cypress run",
     "cypress:open": "$(npm bin)/cypress open",
     "cypress:ci": "cypress run --record --group --ci-build-id $GITHUB_SHA",
     "test": "run-s test:unit test:e2e",
-    "test:unit": "mocha",
-    "test:unit:watch": "mocha --watch --inspect=5556",
+    "test:unit": "NODE_ENV=test mocha",
+    "test:unit:watch": "NODE_ENV=test mocha --watch --inspect=5556",
     "test:e2e": "run-p --race start cypress:run",
     "js:watch": "NODE_ENV=development node server.js",
     "js:build": "webpack --config webpack.config.prod.js",

src/scripts/choices.test.js

@@ -1331,7 +1331,7 @@ describe('choices', () => {
           ...choices[0],
           choices,
         },
-        ...choices[1],
+        choices[1],
       ];
 
       beforeEach(() => {