add test and docs config

Express/barAndCafe/test/app.test.ts

@@ -0,0 +1,39 @@
+import request from "supertest";
+import app from "../src/app";
+import { Server, IncomingMessage, ServerResponse } from "http";
+
+const port = 3000;
+
+let serveur : Server<typeof IncomingMessage, typeof ServerResponse>
+
+describe("Test the root path", () => {
+
+    beforeEach(() => {
+        serveur = app.listen(port, () =>{
+            console.log(`serveur running in ${port}`)
+        })
+    })
+    
+    afterEach((done) => {
+        serveur.close(done)
+    })
+
+    test("It should response the GET method", done => {
+        request(app)
+        .get("/")
+        .then(response => {
+            expect(response.statusCode).toBe(200);
+            done();
+        });
+    });
+
+    test("It should response the GET method", done => {
+        request(app)
+        .get("/")
+        .then(response => {
+            console.log(response)
+            expect(response.text).toEqual("helloworld form dev")
+            done();
+        });
+    });
+});