fix npm run coverage

package.json

@@ -5,7 +5,7 @@
   "main": "index.js",
   "scripts": {
     "test": "mocha 'test/**/*.js' --recursive --timeout 60000 --exit",
-    "coverage": "nyc mocha && nyc report --reporter=html",
+    "coverage": "nyc mocha --exit && nyc report --reporter=html",
     "doc": "jsdoc -c documentation/jsdoc.json"
   },
   "keywords": [],

res.js

+class res
+{
+	constructor() {
+		this.req = {}
+		this.res = {}
+	}
+
+	send()
+	{
+		return res.send;
+	}
+
+
+}
+
+module.exports = res;
\ No newline at end of file

test/unit_tests.js

+const chai = require('chai');
+const chaiHttp = require("chai-http");
+const express = require("../src/servers/serverTwitter");
+const databaseManager = require('../src/mongoose');
+
+chai.should();
+chai.use(chaiHttp);
+
+describe("test twitter webhook", function () {
+	it("Should respond 400 to bogus challenge", (done) =>
+	{
+		chai.request(express)
+			.get("/webhook")
+			.end((err,response) => {
+				response.should.have.status('400');
+				done();
+			});
+	});
+
+	it("Should respond 200 to correct challenge", (done)=>
+	{
+		chai.request(express)
+			.get("/webhook")
+			.query({crc_token:"token"})
+			.end((err,response) => {
+				response.should.have.status('200');
+				done();
+			});
+	})
+
+})