Added mocha, chai, and sinon for unit testing. Created a test-setup.spec file.

package.json

   "description": "A Fo-terminal-like website hosting system.",
   "main": "wwwterm.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "mocha"
   },
   "author": "Bryan Miller",
   "license": "ISC",
     "ejs": "2.6.2",
     "express": "4.17.1",
     "sass": "1.22.7"
+  },
+  "devDependencies": {
+    "chai": "^4.2.0",
+    "mocha": "^6.2.0",
+    "sinon": "^7.3.2"
   }
 }

test/test-setup.spec.js

+
+// NOTE: Idea for this file comes from https://blog.risingstack.com/node-hero-node-js-unit-testing-tutorial/
+const sinon = require('sinon');
+const chai = require('chai');
+
+beforeEach(function(){
+  this.sandbox = sinon.sandbox.create();
+})
+
+afterEach(function(){
+  this.sandbox.restore();
+});
+