Testing module setup in NestJS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the TestingModule from NestJS.

NestJS

import { [1] } from '@nestjs/testing';

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

ATestModule

BTestingModule

CModuleTesting

DNestTesting

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect class names like TestModule or ModuleTesting.

Trying to import from other packages.

The TestingModule is imported from @nestjs/testing to create a test module.

2fill in blank

medium

Complete the code to create a testing module with a service provider.

NestJS

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

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

AMyService

BMyController

CAppModule

DNestService

Attempts:

3 left

💡 Hint

Common Mistakes

Adding controllers or modules as providers.

Using incorrect service names.

Providers are services or classes to be tested, so MyService is the correct provider here.

3fill in blank

hard

Fix the error in retrieving the service instance from the testing module.

NestJS

const service = moduleRef.[1](MyService);

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

Aget

Bfetch

Cretrieve

Dfind

Attempts:

3 left

💡 Hint

Common Mistakes

Using methods like fetch or retrieve which do not exist on TestingModule.

Trying to access the service directly without using a method.

The get method is used to retrieve an instance of a provider from the testing module.

4fill in blank

hard

Fill both blanks to correctly import and create a testing module.

NestJS

import { [1] } from '@nestjs/testing';
const module = await [2].createTestingModule({}).compile();

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

ATest

BTestingModule

CTestModule

DNestTest

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing the import with TestingModule which is a class, not the utility object.

Using incorrect names like TestModule or NestTest.

The Test object is imported and used to create the testing module.

5fill in blank

hard

Fill all three blanks to create a testing module, compile it, and retrieve a service.

NestJS

import { [1] } from '@nestjs/testing';

const moduleRef = await [2].createTestingModule({ providers: [MyService] }).compile();
const service = moduleRef.[3](MyService);

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

ATest

BTestingModule

Cget

DTestModule

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'TestingModule' as the utility object instead of 'Test'.

Using incorrect retrieval methods like 'fetch' or 'retrieve'.

Use Test to import and create the testing module, then use get to retrieve the service instance.