diff --git a/tests/2_functional-tests.js b/tests/2_functional-tests.js
index a318397..59c1530 100644
--- a/tests/2_functional-tests.js
+++ b/tests/2_functional-tests.js
@@ -1,10 +1,81 @@
-const chaiHttp = require('chai-http');
-const chai = require('chai');
+const chaiHttp = require("chai-http");
+const chai = require("chai");
 let assert = chai.assert;
-const server = require('../server');
+const server = require("../server");
 
 chai.use(chaiHttp);
 
-suite('Functional Tests', function() {
+suite("Functional Tests", function () {
+  this.timeout(5000);
+  test("Convert a valid input such as 10L: GET request to /api/convert.", (done) => {
+    chai
+      .request(server)
+      .keepOpen()
+      .get("/api/convert?input=10L")
+      .end(function (err, res) {
+        assert.equal(res.status, 200);
+        assert.deepEqual(res.body, {
+          initNum: 10,
+          initUnit: "L",
+          returnNum: 2.64172,
+          returnUnit: "gal",
+          string: "10 liters converts to 2.64172 gallons",
+        });
+        done();
+      });
+  });
 
+  test("Convert an invalid input such as 32g: GET request to /api/convert.", (done) => {
+    chai
+      .request(server)
+      .keepOpen()
+      .get("/api/convert?input=32g")
+      .end(function (err, res) {
+        assert.equal(res.status, 200);
+        assert.strictEqual(res.text, "invalid unit");
+        done();
+      });
+  });
+
+  test("Convert an invalid number such as 3/7.2/4kg: GET request to /api/convert.", (done) => {
+    chai
+      .request(server)
+      .keepOpen()
+      .get("/api/convert?input=3/7.2/4kg")
+      .end(function (err, res) {
+        assert.equal(res.status, 200);
+        assert.strictEqual(res.text, "invalid number");
+        done();
+      });
+  });
+
+  test("Convert an invalid number AND unit such as 3/7.2/4kilomegagram: GET request to /api/convert.", (done) => {
+    chai
+      .request(server)
+      .keepOpen()
+      .get("/api/convert?input=3/7.2/4kilomegagram")
+      .end(function (err, res) {
+        assert.equal(res.status, 200);
+        assert.strictEqual(res.text, "invalid number and unit");
+        done();
+      });
+  });
+
+  test("Convert with no number such as kg: GET request to /api/convert.", (done) => {
+    chai
+      .request(server)
+      .keepOpen()
+      .get("/api/convert?input=kg")
+      .end(function (err, res) {
+        assert.equal(res.status, 200);
+        assert.deepEqual(res.body, {
+          initNum: 1,
+          initUnit: "kg",
+          returnNum: 2.20462,
+          returnUnit: "lbs",
+          string: "1 kilograms converts to 2.20462 pounds",
+        });
+        done();
+      });
+  });
 });