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@nestjs/testing

Nest - modern, fast, powerful node.js web framework (@testing)

  • 10.2.7
  • Source
  • npm
  • Socket score

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What is @nestjs/testing?

The @nestjs/testing package provides a set of utilities designed to help with the testing of NestJS applications. It simplifies the process of setting up a testing environment, allowing developers to focus on writing their tests. This package is specifically tailored for NestJS, making it easier to test modules, services, controllers, and other components within a NestJS application.

What are @nestjs/testing's main functionalities?

Unit Testing Controllers

This example demonstrates how to set up a unit test for a controller in NestJS using the @nestjs/testing package. It shows the creation of a testing module, mocking dependencies, and asserting the controller's existence.

import { Test, TestingModule } from '@nestjs/testing';
import { CatsController } from './cats.controller';
import { CatsService } from './cats.service';

describe('CatsController', () => {
  let controller: CatsController;

  beforeEach(async () => {
    const module: TestingModule = await Test.createTestingModule({
      controllers: [CatsController],
      providers: [{ provide: CatsService, useValue: {} }],
    }).compile();

    controller = module.get<CatsController>(CatsController);
  });

  it('should be defined', () => {
    expect(controller).toBeDefined();
  });
});

Integration Testing

This code snippet illustrates how to perform an integration test on a NestJS application. It involves setting up the entire application within the test environment and using the 'supertest' package to make HTTP requests to test the application's endpoints.

import { Test, TestingModule } from '@nestjs/testing';
import { INestApplication } from '@nestjs/common';
import * as request from 'supertest';
import { AppModule } from './../src/app.module';

describe('Cats', () => {
  let app: INestApplication;

  beforeAll(async () => {
    const moduleFixture: TestingModule = await Test.createTestingModule({
      imports: [AppModule],
    }).compile();

    app = moduleFixture.createNestApplication();
    await app.init();
  });

  it('/GET cats', () => {
    return request(app.getHttpServer())
      .get('/cats')
      .expect(200)
      .expect('This action returns all cats');
  });
});

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Package last updated on 05 Oct 2023

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