E2E testing with supertest in NestJS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Supertest library.

NestJS

import request from '[1]';

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

Asupertest

Bjest

Cexpress

Dhttp

Attempts:

3 left

💡 Hint

Common Mistakes

Importing 'express' instead of 'supertest'.

Using 'jest' which is a test runner, not for HTTP requests.

The supertest library is imported as request to perform HTTP requests in E2E tests.

2fill in blank

medium

Complete the code to create a NestJS testing module for E2E tests.

NestJS

const moduleRef = await Test.createTestingModule({ imports: [[1]] }).compile();

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

AHttpModule

BTestingModule

CSupertestModule

DAppModule

Attempts:

3 left

💡 Hint

Common Mistakes

Importing a non-existent module like 'SupertestModule'.

Using 'HttpModule' which is for HTTP clients, not the app module.

In NestJS E2E tests, you import the main AppModule to test the full application.

3fill in blank

hard

Fix the error in the test to correctly send a GET request to '/users'.

NestJS

return request(app.getHttpServer()).[1]('/users').expect(200);

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

Aput

Bpost

Cget

Ddelete

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'post' or 'put' which are for sending data, not fetching.

Using 'delete' which removes data.

To test a GET request, use the get method of Supertest.

4fill in blank

hard

Fill both blanks to check the response body contains a user with id 1.

NestJS

expect(response.body).toEqual(expect.arrayContaining([expect.objectContaining({ id: [1], name: [2] })]));

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A1

B'John'

C'Jane'

D2

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong id like 2 or wrong name like 'Jane'.

Not matching the exact types (number vs string).

The test checks if the response body array contains an object with id 1 and name 'John'.

5fill in blank

hard

Fill all three blanks to send a POST request with JSON body and check status 201.

NestJS

return request(app.getHttpServer()).[1]('/users').send({ name: [2] }).expect([3]);

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

Apost

B'Alice'

C201

Dget

Attempts:

3 left

💡 Hint

Common Mistakes

Using GET instead of POST for sending data.

Expecting wrong status code like 200 instead of 201.

Use post to send data, 'Alice' as the name in JSON, and expect HTTP status 201 for resource creation.