add unit test

__tests__/gitlab.unit.test.js

+const gitlab = require('../routes/gitlab')
+const axios = require('axios')
+
+beforeAll(() => {
+    // test gitlab API connection
+    var config = {
+        method: 'get',
+        url: 'https://transfer.hft-stuttgart.de/gitlab/api/v4/projects'
+    }
+      
+    axios(config)
+    .then(function (response) {
+        expect(response.statusCode).toBe(200)
+    })
+})
+
+describe('GitLab API test', () => {
+    test("Get a gitlab userID by email", () => { // email = any email address
+        gitlab.getUserIdByEmail("test@email.de", function(resp){
+            expect(resp).not.toBeNull()
+        })
+    })
+
+    test("Get the projects of a particular user", () => { // userID = any integer
+        gitlab.getUserProjects(3, function(resp){
+            expect(resp).not.toBeNull()
+        })
+    })
+})
\ No newline at end of file

__tests__/method.unit.test.js

+const dbconn = require('../routes/dbconn')
+const methods = require('../routes/methods')
+
+beforeAll(() => {
+    // test DB connection
+    dbconn.user.query('SELECT 1 + 5 AS solution', function (err, rows) {
+        expect(err).toBeNull()
+        expect(rows[0].solution).toBe(6)
+    })
+    dbconn.project.query('SELECT 10 + 5 AS solution', function (err, rows) {
+        expect(err).toBeNull()
+        expect(rows[0].solution).toBe(15)
+    })
+})
+
+describe("DB methohds test", () => {
+/*
+    test("Get a user from DB by email", () => {
+        let gitlabUserData = "to-be-defined"
+        methods.addGitlabUser(gitlabUserData, function(data, err){
+            expect(data).not.toBeNull()
+            expect(err).toBeNull()
+        })
+    }) */
+    
+    test("Get a user from DB by email", () => { // email = any email address
+        methods.getUserByEmail("test@email.de", function(data, err){
+            expect(data).not.toBeNull()
+            expect(err).toBeNull()
+        })
+    })
+
+    test("Get a user from DB by ID", () => { // ID = any integer
+        methods.getUserById(100, function(data, err){
+            expect(data).not.toBeNull()
+            expect(err).toBeNull()
+        })
+    })
+
+    test("Check user email", () => { // email = any email address
+        methods.checkUserEmail("test@email.de", function(err, data){
+            expect(data).not.toBeNull()
+            expect(err).toBeNull()
+        })
+    })
+
+    test("Get a user by token", () => { // token = any alphanumeric
+        methods.checkUserEmail("1abc0qwerty", function(err, data){
+            expect(data).not.toBeNull()
+            expect(err).toBeNull()
+        })
+    })
+})

__tests__/routes-account.unit.test.js

+describe('Sample Test', () => {
+  it('should test that true === true', () => {
+    expect(true).toBe(true)
+  })
+})
\ No newline at end of file

package.json

@@ -17,11 +17,11 @@
   },
   "scripts": {
     "start": "nodemon app.js",
-    "test": ""
+    "test": "jest"
   },
   "dependencies": {
     "async": "^3.1.0",
-    "axios": "^0.21.0",
+    "axios": "^0.21.1",
     "bcryptjs": "^2.4.3",
     "body-parser": "^1.19.0",
     "compression": "^1.7.4",
@@ -36,13 +36,14 @@
     "fs": "0.0.1-security",
     "helmet": "^3.23.3",
     "i18n": "^0.8.5",
+    "jest": "^26.6.3",
     "morgan": "^1.9.1",
     "mysql": "^2.17.1",
     "nodemailer": "^6.3.1",
     "nodemon": "^2.0.1",
     "passport": "0.3.2",
     "passport-saml": "^1.4.2",
-    "pug": "^2.0.4"
+    "pug": "^3.0.2"
   },
   "devDependencies": {},
   "engines": {