Implemented Jest tests

src/__tests__/app.test.ts

@@ -0,0 +1,33 @@
+import { initServer } from '../app.js'
+import request from 'supertest'
+
+const app = initServer()
+
+describe('GET /v1', () => {
+    it('returns status code 200 and api version message', async () => {
+        const res = await request(app)
+            .get('/v1')
+
+        expect(res.statusCode).toEqual(200)
+        expect(res.body).toHaveProperty('message')
+    })
+})
+
+describe('POST /v1/login', () => {
+    it('returns status code 200 and set httpOnly jwt token cookie', async () => {
+        const res = await request(app)
+            .post('/v1/login')
+            .set('Content-Type', 'application/json')
+            .send(JSON.stringify({
+                email: "a@a.com",
+                password: "aaaaaaaaaa"
+            }))
+
+        const jwtRegEx = /^jwt=.*Path=\/.*HttpOnly.*Secure.*SameSite=Strict.*$/
+        const jwtToken = res.get('Set-Cookie')
+            .filter(cookie => cookie.match(jwtRegEx))
+
+        expect(res.statusCode).toEqual(200)
+        expect(jwtToken).not.toBe(undefined)
+    })
+})