Testing GET endpoints in Express - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Express module.

Express

const express = require([1]);

Drag options to blanks, or click blank then click option'

A"express"

B"http"

C"path"

D"fs"

Attempts:

3 left

💡 Hint

Common Mistakes

Using other module names like 'http' or 'fs' instead of 'express'.

Forgetting to put quotes around the module name.

To use Express, you must import it with require('express').

2fill in blank

medium

Complete the code to create a new Express application.

Express

const app = [1]();

Drag options to blanks, or click blank then click option'

Ahttp

Bexpress

Crequire

Dapp

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to call require() instead of express().

Using http() which is not the Express app creator.

You create an Express app by calling the express() function.

3fill in blank

hard

Fix the error in the GET route handler to send a response.

Express

app.get('/hello', (req, res) => {
  res.[1]('Hello World');
});

Drag options to blanks, or click blank then click option'

Asend

Bjson

Cend

Dwrite

Attempts:

3 left

💡 Hint

Common Mistakes

Using res.write() without ending the response.

Using res.end() without sending data.

The res.send() method sends the response body to the client.

4fill in blank

hard

Fill both blanks to start the server on port 3000 and log a message.

Express

app.listen([1], () => {
  console.[2]('Server running on port 3000');
});

Drag options to blanks, or click blank then click option'

A3000

Blog

Cerror

Dinfo

Attempts:

3 left

💡 Hint

Common Mistakes

Using console.error or console.info instead of console.log.

Passing a string instead of a number as the port.

The app.listen method starts the server on the given port. console.log prints the message.

5fill in blank

hard

Fill all three blanks to test the GET /hello endpoint using supertest.

Express

import request from 'supertest';
import app from './app';

test('GET /hello returns Hello World', async () => {
  const response = await request(app).[1]('/hello');
  expect(response.statusCode).toBe([2]);
  expect(response.[3]).toBe('Hello World');
});

Drag options to blanks, or click blank then click option'

Aget

B200

Ctext

Dbody

Attempts:

3 left

💡 Hint

Common Mistakes

Using post instead of get.

Checking response.text instead of response.body.

Expecting status code other than 200.

Use request(app).get('/hello') to send a GET request. The status code for success is 200. The response body contains the returned string.