Surely, you Jest (#38)

* Add Jest and reorg files

* Fix Travis config

* Add step names

.eslintrc.json

@@ -5,11 +5,12 @@
     "es6": true,
     "jquery": true
   },
-  "extends": ["eslint:recommended", "prettier"],
-  "plugins": ["prettier"],
+  "extends": ["eslint:recommended", "prettier", "plugin:jest/recommended"],
+  "plugins": ["prettier", "jest"],
   "globals": {
     "Atomics": "readonly",
-    "SharedArrayBuffer": "readonly"
+    "SharedArrayBuffer": "readonly",
+    "jest/globals": true
   },
   "parserOptions": {
     "ecmaVersion": 2018

.travis.yml

@@ -4,9 +4,13 @@ node_js:
 
 branches:
   only:
-  - master
+    - master
 
 jobs:
   include:
     - stage: Test
+      name: 'ESLint'
       script: npm run lint
+    - # stage name not required, will continue to use `Test`
+      name: 'Jest Testing'
+      script: npm test