Testing POST with request body 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]');

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Aexpress

Bhttp

Cfs

Dpath

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'http' instead of 'express'

Forgetting to put the module name in quotes

The Express module is imported using require('express').

2fill in blank

medium

Complete the code to parse JSON request bodies in Express.

Express

app.use([1].json());

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AbodyParser

Bexpress

Crouter

Dhttp

Attempts:

3 left

💡 Hint

Common Mistakes

Using bodyParser without importing it

Using app.json() instead of express.json()

Express has built-in middleware to parse JSON bodies: express.json().

3fill in blank

hard

Fix the error in the POST route handler to access the request body.

Express

app.post('/data', (req, res) => {
  const data = req.[1];
  res.send(data);
});

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Aparams

Bheaders

Cquery

Dbody

Attempts:

3 left

💡 Hint

Common Mistakes

Using req.params which is for URL parameters

Using req.query which is for URL query strings

The POST request body is accessed via req.body in Express.

4fill in blank

hard

Fill both blanks to create a test using supertest to POST JSON data.

Express

request(app)
  .post('/submit')
  .send({ name: 'Alice' })
  .expect([1], [2]);

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A200

Bjson

Ctext

D404

Attempts:

3 left

💡 Hint

Common Mistakes

Using 404 instead of 200 for success

Using 'text' instead of 'json' for JSON responses

The test expects a 200 status code and a JSON response.

5fill in blank

hard

Fill all three blanks to complete the test that sends JSON and checks the response.

Express

test('POST /api/data', async () => {
  const response = await request(app)
    .post('/api/data')
    .set('[1]', 'application/json')
    .send({ key: 'value' });
  expect(response.status).toBe([2]);
  expect(response.body).toHaveProperty('[3]');
});

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AContent-Type

B200

Ckey

DAuthorization

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Authorization' header instead of 'Content-Type'

Expecting status 404 instead of 200

Checking for a wrong property name in response body

The test sets the 'Content-Type' header to 'application/json', expects status 200, and checks the response body has the 'key' property.