Nestjs typeorm unit testing Working with stateful data and databases is hard, especially when your project grows … Mar 17, 2018 · This method looks to me like a good candidate for integration testing rather than unit testing which would cause implementation details to leak into the test. May 18, 2021 · How to unit test typeorm getRepository with Jest? Asked 4 years, 6 months ago Modified 3 years, 6 months ago Viewed 9k times A collection of NestJS testing examples. MethodA in a class may be calling MethodB in another class. In this article, we will focus on unit tests. May 29, 2025 · Learn why unit testing matters in NestJS, the tools you need (Jest, @nestjs/testing), and how to test services with a real-world UserService example. Typeorm Testing module for NestJS, with this module you don't need an access to DB to test the BeforeInsert hook of typeorm entities. Now I am trying to use SQLite(In-Memory) to test API re $ npm i --save-dev @nestjs/testing Unit testing In the following example, we test two classes: CatsController and CatsService. Jun 9, 2022 · The tests on service layer should focus on interactions with the TypeOrm repository. These major versions should match each other. However, it's always better to see an example, so here is a possibility of a mock for the controller: Jul 6, 2020 · Testing our application can increase our confidence when it comes to creating a fully-functional API. js server-side applications. I have the required packages needed ("pg": "^8. Boilerplate for NestJS projectsBoilerplate Clean NestJs architecture - This boilerplate show how to setup a clean architecture with NestJs including unit, integration and e2e tests. When working with database-driven services, it’s crucial to validate not just isolated logic (unit testing) but also full application behavior (integration testing). ts import { Controller, Get, Param, Post, UseGuards } from '@nestjs/common'; import { UsersService } Dec 5, 2022 · I am trying to write tests for a small project in NestJS. I don't want to do actual database calls. Mar 12, 2020 · 19 Mocking in NestJS is pretty easily obtainable using the testing tools Nest exposes is @nestjs/testing. NestJS provides excellent tools and support for both unit and integration testing, allowing you to write tests that ensure the reliability and correctness of your codebase. This allows you to test your NestJS application without having to connect to a database. I'm using yarn: yarn add jest ts-jest @types/jest -D yarn add typeorm typescript pg Then, let's create our tsconfig file: yarn tsc --init Jest configs Ok, now we need to configure our jest. TypeORM Integration For integrating with SQL and NoSQL databases, Nest provides the @nestjs/typeorm package. Jul 29, 2024 · TypeORM allows you to work with databases using TypeScript or JavaScript and provides a repository and DataMapper pattern for working with data in a type-safe way. prisma-sample in testing-nestjs) are for "end to end" testing. For… May 14, 2025 · To learn how to add unit and integration tests to a NestJS GraphQL project and automate the testing process with CircleCI, review the Continuous integration for NestJS GraphQL projects blog post. config. 5 (111 ratings) 1,067 students Jan 23, 2023 · Custom repositories extend the base repository class and enrich it with several additional methods. The idea is to create an in-memory sqlite database that we can setup when the test starts and tear down after the test Prerequisites To do this we are going to use the following npm packages Typescript (must be installed locally for ts-jest to work) Jest and ts-jest (ts-jest depends on jest) TypeOrm Jan 23, 2022 · I'm writing UT's for the NestJS application. - Basic about testing controller and services - Different ways to Mock service or Providers - Mocking External auth or data services - Nest JS Testing with TypeORM interface - NestJS Testing with Knex or Prisma Mar 23, 2023 · Seems that you are mocking TypeORM which you shouldn't. src/s Deep dive into setting up NestJS with TypeORM with postgres as DB along with repositories, relations, transactions, subscriptions, migrations & unit testing Jun 30, 2023 · I am setting up a NestJs application with TypeORM and postgres driver. May 18, 2021 · How to test custom Repository in Nestjs/TypeORM applications Asked 3 years, 9 months ago Modified 3 years, 5 months ago Viewed 5k times Jul 14, 2022 · I have searched typeOrm docs and on here at StackOverflow but nothing is helping. I'm having issues mocking or even testing the logic of the transaction internal function. The file I am creating unit tests for uses queryRunner to start a transaction. Jest mock typeorm datasource is a library that allows you to mock the datasource in your tests. See full list on blog. Nov 4, 2023 · Introduction In NestJS, a popular Node. May 13, 2021 · I am currently unit testing my NestJS service. Jest mock typeorm datasource is easy to use and can help you write more reliable tests. Sep 5, 2021 · Testing custom repositories (NestJS/TypeORM) Published September 5, 2021 ・ Last updated June 2, 2025・2 min read Custom repositories extend the base repository class and enrich it with several additional methods. Master the building blocks and essentials concepts behind creating your own enterprise-grade applications. connection. This post covers unit and integration testing. May 15, 2020 · NestJs unit testing on typeorm pagination getting error queryBuilder. 7K subscribers Subscribe Mar 28, 2021 · [FAILING TEST] Unit testing a NestJS Service that consumes a TypeORM Repository #1298 Closed jrista opened this issue on Mar 28, 2021 · 6 comments jrista commented on Mar 28, 2021 • Dec 4, 2021 · 17 Most examples I've seen of how to test a Prisma-injected NestJS Service (e. I am right now using Transaction decorators from TypeOrm. @Controller('auth') export class AuthController { constructor( private readonly authService: Jun 8, 2022 · So, we are going to tests layer by layer and begin by unit tests on service layer. This comprehensive guide will walk you through: Table of Contents Why Test Services with DB Access? Testing services that communicate with […] I did the guide by this archicle: Automated testing for NestJS GraphQL projects . Sep 7, 2022 · I have build a BaseTest from which all my other tests inherit. With Unit of Work Using the Unit of Work pattern, all operations are wrapped in a transaction, ensuring that they succeed or fail together. But the test fails to run when I don't have the Apr 11, 2023 · Software test automation refers to using software tools to automate the execution of tests and compare actual results with expected results, resulting in more efficient and accurate testing processes. This is a piece of code from the service which gets a connecti In this video we go over the fundamentals of writing unit, integration, e2e tests for a NestJS API application. It uses progressive JavaScript, is built with and fully supports TypeScript (yet still enables developers to code in pure JavaScript) and combines elements of OOP (Object Oriented Programming), FP (Functional Programming), and FRP (Functional Reactive Programming). Dec 11, 2022 · In a NestJS project using Jest test the service case. I (think I) am following the documentation on NestJS, and certain stackoverflow items. Aside from testing how our services integrate, we’ve also used the SuperTest library and tested a controller. Unit testing focuses on writing tests for the smallest possible units. mockImplementation((dto) =&g NestJS Testing Tutorial #1 - Unit Testing Controllers Anson 64. BASE_URL + 'dummy') export class DummyContoller { Jul 26, 2019 · What would be the right way for unit testing such an insert on two tables. The process is similar to the one described for nestjs, but it has a few differences. Oct 12, 2022 · DEPT® Engineering Blog Platforms Integration Testing NestJS APIs with a Test Database Unit tests for APIs can sometimes provide little to no value, so the next logical step is often to write integration tests. Example how to mock TypeORM database connection for your blazing unit-tests with Mocha and Jest - yzevm/typeorm-mock-unit-testing-example In this lesson, you'll learn about the importance of unit testing in application development, how to integrate mocking frameworks for efficient testing, and the process of writing unit tests for controllers and services in a NestJS application. For the sake of Tagged with node, nestjs, testing, javascript. 13 This question can likely be generalized to stubbing repositories in a service and how to properly test and provide coverage in the context of this question. The following snippets can be adjusted and Sep 2, 2021 · NestJS + Jest + TypeOrm: Criando testes unitários Fala galera, tudo bem com vocês??? Neste artigo, quero demonstrar uma forma criar testes unitários com Jest em aplicações NestJS + TypeOrm. Hint Suites is a third-party package and is not Sep 4, 2021 · The how to Lets look at how you too can use this approach to unit-test your code with TypeOrm. But when it comes to testing your services, the way you inject your repositories can make all the difference. // … testing-nestjs A repository to show off to the community methods of testing NestJS including Unit Tests, Integration Tests, E2E Tests, pipes, filters, interceptors, GraphQL, Mongo, TypeORM, and more! NestJS is a framework for building efficient, scalable Node. Instead of using a real database, we can mock the TypeORM repository to ensure isolated and faster unit tests. - devniel/nestjs-typeorm-testing Dec 29, 2022 · 3 I am working on creating unit tests for a project that uses Typeorm without Nestjs. It's essential to isolate Testing custom repositories (NestJS/TypeORM) Custom repositories extend the base repository class and enrich it with several additional methods. But recently in one of the projects I faced an issue with end-to-end testing. @InjectEntityManager() just injects the object that (theoretically) already has the connection set up for you, and you can just use the methods without concern about the connection. It ensures that the code behaves as expected and helps in maintaining a bug-free … Jul 13, 2019 · Unit Test - Nest can't resolve dependencies of the Repository (?). If you need to setup TypeORM, consider reading the awesome NestJS documentation. There are multiple tests, including unit testing, integration testing, and end-to-end (E2E) testing. Jan 25, 2025 · When working with NestJS modules that rely on TypeORM, it’s common to encounter challenges in testing without invoking the actual database. Oct 18, 2021 · Assuming you already configured TypeORM in your NestJS project. 2K subscribers 295 Apr 5, 2022 · Testing is one of the most important and a major part of any application development, NestJS by default uses Jest & Supertest for making unit tests & end-to-end testing jobs easier. It is easy to use and can be installed with a single command. logrocket. UsersService gets the Typeorm Repository injected: constructor ( @InjectRepository (User) private usersRepository: Repository<User>, ) {} It is possible to test services that use TypeOrmQueryService. Whether you’re a beginner or NestJS supports unit and end-to-end (e2e) testing, typically using the Jest framework. Jul 28, 2023 · Mastering Testing in NestJS: A Comprehensive Guide In the world of software development, testing is a critical component that ensures the reliability, stability, and quality of your applications. The second approach would be to pass the type of column explicitly, for example, by using @Column('text'). Oct 29, 2024 · Mastering Unit Testing in NestJS: An Architect’s Perspective A Comprehensive Guide to Writing Clean, Maintainable Tests After years of architecting test automation strategies across various Node Unit testing NestJS with Typeorm in memory Assuming you already configured TypeORM in your NestJS project. Custom repositories extend the base repository class and enrich it with several additional methods. ts import… Feb 23, 2024 · Introduction Testing javascript based services in backend context is a required practise Tagged with nestjs, e2e, testing, node. I am in the process of learning more about testing, but am stuck with how to properly perform testing that involves the DB. com/ronnymedina/nest-curso-basico-mini Oct 18, 2023 · Applying Unit Tests on NestJS with Jest and GitHub Actions Hello fellow coders! In this post we are still going to talk about tests, but, instead of e2e we are going to implement unit tests, I’d … Oct 9, 2019 · NestJS, TypeORM and PostgreSQL — full example development and project setup working with database migrations. NestJS Testing Tutorial #3 - Unit Testing with TypeORM Repositories Anson the Developer 61. I personally love using TypeScript on the Backend and having a good Separation of concerns (SoC) while I'm creating my services, following a technology-agnostic approach for the win! But sometimes it's difficult to do certain things, especially the tests for our code, which is Jun 29, 2020 · This guide covers a basic setup for integration and/or end-to-end (e2e) testing on a NestJS project that uses TypeORM and Postgres for database connectivity, and JWT for authentication. If set this database connection // /test/connection. 11. It covers the importance of E2E testing, setting up the testing environment, and writing and running E2E tests. com Mar 26, 2019 · My solution uses sqlite memory database where I insert all the needed data and create schema before every test run. Oct 30, 2023 · To have a better vision of unit tests, we can compare them to e2e, where we are running the whole nestjs application basically, with unit tests we are going to run a module, a service, and pieces of the system, right? Some references bliki: UnitTest Definition of a Unit Test - The Art of Unit Testing The project NestJs - Build Modern APIs in NestJs with Unit Testing Build Modern API with Nest Js with MongoDB & Postgres, including Authentication, Typescript, TypeORM, Unit & e2e testing 4. js server-side applications using TypeScript and combining OOP, FP, and FRP principles. If you need to setup TypeORM, Tagged with testing, nestjs, typeorm, typescript. This guide will walk you through setting up Jest for testing in a NestJS application, the various types of Esta guía te ha mostrado cómo escribir y ejecutar pruebas unitarias en NestJS 10. Hint Suites is a third-party package and is not Nest JS Authentication using TypeORM & JWT (in cookies) and unit testing - satriyoaji/nestjs-typeorm-auth Feb 1, 2020 · Create a NestJS microservice on TCP with TypeORM, MariaDb and learn how to write Unit, Integration and E2E tests. js framework, unit testing plays a crucial role in maintaining the reliability and quality of your codebase. My entity is called 'User' and I established a basic Service that allows me to interact with a MS SQL server, with GET and POST endpoints established NestJS Testing Master Course #nestjs #testing #jest #microservices Hi Everyone, 🔥 This Video is a part of the Playlist "Nest JS Advanced Course 2024" and we are covering all advanced things Jul 18, 2022 · I am trying to mock out a repository. skip is not a function Asked 5 years ago Modified 5 years ago Viewed 5k times Jun 14, 2020 · Hello Everyone! So, today I'll show you how to configure your code to make tests with TypeORM and Jest. Modules First thing first, let's install some modules in our node environment. fn(). any form of help is welcome unit-testing jestjs repository nestjs typeorm asked Jul 14, 2022 at 8:15 MSadiq 307412 maybe you not init repository when run . I created a find method and use it in a resolver (GraphQL) function. I tried multiple ways but the mock is never getting called to replace the actual Datasource that has access to the postgresql These integrations provide additional NestJS-specific features, such as model/repository injection, testability, and asynchronous configuration to make accessing your chosen database even easier. We can then get the repo from the module and save it to a value for easy mocking and set up our tests like so: import { Test, TestingModule } from '@nestjs Guide to TypeORM with NestJS, Postgres, MySQL, Multer, Docker and Docker Compose A progressive Node. It consists on evaluating the behavior of each software … Apr 17, 2019 · I would like to be able to test my Nest service against an actual database. js framework for building efficient and scalable server-side applications. Here is the relevant code for context: dummy. My problem is, I am not able to mock the Datasource. Aug 8, 2022 · Loading Loading Suites (formerly Automock) Suites is an opinionated and flexible testing meta-framework designed to enhance the software testing experience for backend systems. controller. Please make sure that the argument at index [0] is available in the TypeOrmModule context. I'm currently trying to write both unit and e2e tests according to the NestJS Nov 12, 2024 · Learn how to architect testable systems and write effective unit tests in NestJS based on real-world experience, with strategies to keep tests clean and maintainable. However, recently, the I'm using NestJs with Typeorm, normal setup. js Unit Testing | Best Practices + MongoDB Michael Guay 23. It is possible because NestJS uses reflect-metadata under the hood. Contribute to deboraornellas/nestjs-testing development by creating an account on GitHub. By bringing together a variety of testing tools into a unified framework, Suites streamlines the creation of reliable tests, helping to ensure the development of high-quality software. Goes against unit testing in my opinion. For my current needs, I want to implement lower-level "integration" testing. In a powerful framework like NestJS, using Jest as a testing framework can seem daunting at first, but it’s an excellent choice that integrates seamlessly into your workflow. Nest. What would this test achieve, if it were to pass? A unit test should test a meaningful logical unit of code. To answer the question more broadly, if you want to Oct 11, 2019 · // The testing module should be barebones imports: [ // basically looks like a unit test but goes through the HTTP motions // if you want to include the AppModule you'll need to create a configuration // for the database module (TypeORM) that will be accessible in a testing context // AppModule, CatModule, ], }) En este video veremos como hacer nuestro primer test de nuestro controller. import { HttpMod Get up to speed with NestJS fast. What you might do is to mock createDBConnection in the components that are consuming it, or maybe design your code with dependency injection (DI) so you can inject your DataSource instance in your application, or its double In coming videos, we are covering NestJS Unit and E2E Testing Testing in NestJS is crucial to ensure your application works as expected. Jun 15, 2023 · Testing Your API Services with NestJS — Mocking vs Real Database Unit testing is an essential part of the software development lifecycle. The available column types differ between databases like MySQL and Postgres. data-source. save () – Num CommentedJul 14, 2022 at 8:38 sorry, but I don't get what you mean by init repository – MSadiq NestJS supports unit and end-to-end (e2e) testing, typically using the Jest framework. The article also provides unique insights into testing scenarios involving PostgreSQL and Redis databases, including the Cache Aside pattern. However, a unit test of Apr 8, 2022 · Hello folks, I've been using NestJS for the last few years and it's an amazing framework for NodeJS and ExpressJS. So each test counts with the same set of data and you do not have to mock any TypeORM methods: A repository to show off to the community methods of testing NestJS including Unit Tests, Integration Tests, E2E Tests, pipes, filters, interceptors, GraphQL, Mongo, TypeORM, and more! Each folder is a fully functional Nest application on its own. Nov 2, 2023 · NestJS Repository Testing: A Comprehensive Guide Testing is an integral part of the software development process. js with Jest #1 - All About Mock, Testing Service Files Coding With Abbas 5. Oct 8, 2022 · One of its key features is the ability to easily inject dependencies, including TypeORM repositories, into your service classes. Learn how to isolate components for cl May 17, 2022 · How to mock when using Typeorm Transaction Decorator in NestJS application unit tests? Asked 2 years, 10 months ago Modified 2 years, 10 months ago Viewed 1k times Mar 21, 2023 · unit-testing automated-tests nestjs nestjs-testing asked Mar 21, 2023 at 15:58 Louguiman 52 1 Answer Sorted by: 0 May 20, 2024 · We set up NestJS with Drizzle to perform CRUD operations and manage SQL migrations Apr 27, 2025 · Testing is an essential part of building reliable and maintainable NestJS applications. In this tutorial, we'll show you how to create a unit test for a service that uses a TypeORM repository in a MySQL database. I understand that most unit tests should use a mock object, but it also, at times, makes sense to test against the database Aug 2, 2023 · Hello friends, I would like to demonstrate how to perform custom validation with the database in NestJs along with its unit tests. Here’s a brief guide on how to set up and perform both types of tests in a NestJS project. You can find the documentation on the GitHub repository. Transactions typeorm-transactional library uses CLS (Continuation Local Storage) to handle and propagate transactions between different repositories and service methods. Sep 15, 2022 · I am trying to add unit tests for my Nest app that uses typeorm. This post covers the unit and integration testing. take (). For the sake of testing something, I'll setup a simple API that will serve spaceships! You can access the sample repository on github. For real API requests, CRUD operation is being operated on MySQL(which is using AWS RDS). To perform e2e tests we use a similar configuration to the one we just covered in unit testing. - Basic about testing controller and services - Different ways to Mock service or Providers - Mocking External auth or data services - Nest JS Testing with TypeORM interface - NestJS Testing with Knex or Prisma Jan 17, 2025 · Scattered Transaction Logic: Each repository call handles its operations separately, leading to duplication and harder maintainability. I have tried a number of technic but non seem to work. I have a function that uses transactions like this: async createMany(users: User[]) { await this. NestJS supports unit and end-to-end (e2e) testing, typically using the Jest framework. Puedes expandir estas pruebas para cubrir todos los aspectos de tu aplicación y asegurar una base de código robusta y mantenible. When test the resolver, it can't find the find method in the service. The project was built using NestJS + TypeORM + Postgres. It makes testing significantly easier (in my opinion). Jun 4, 2021 · I am not sure how to implement unit test in nestjs and typeorm without connecting to db. Dec 19, 2022 · We explain unit tests and write them for our NestJS application that works with raw SQL queries. Launch your MVP in 30 days. This can be useful for testing your application's data layer without having to worry about making real database calls. The tests on service layer should focus on interactions with the TypeOrm repository. Jul 17, 2024 · NestJS supports unit and end-to-end (e2e) testing, typically using the Jest framework. I am trying to mock the database connection and the database objects within this test. In short, you'll want to create a Custom Provider for the dependency you are looking to mock, and that's all there is. and you're good to go! Before we begin, let's refresh the basic concepts of unit testing. . My user service has a mock repository set up like this: const mockUsersRepository = { create: jest. You don’t want to touch live data though, and want tests to make assertions against actual (un-mocked) service logic. I have a class with a createOrder function as shown below. Jul 10, 2020 · I'm trying to unit test this controller and mock away the services/repositories that it needs. In this video, we do a deep dive into setting up NestJS with TypeORM. The following is an approach to do just that. In order to simplify testing of these other services, I would like to spin up a version of the Nest server that does not use a real database. g. I've really run out of ideas to try. NestJS supports unit and end-to-end (e2e) testing Jul 13, 2020 · In this article, we’ve gone through ways to write integration tests for our NestJS API. As mentioned, Jest is provided as the default testing framework. You should trust the API and that TypeORM will return an instance of DataSource and that it sets isInitialized=true. Apr 27, 2025 · Testing is an essential part of software development, ensuring that your application behaves as expected and preventing bugs. Dec 8, 2021 · Nest can't resolve dependencies: NettJS Unit testing with TypeORM Asked 3 years, 6 months ago Modified 3 years, 6 months ago Viewed 4k times NestJS Master Course Agenda #Intro #01 #nestjsHi Everyone, 🔥 This Video is a part of the Playlist "Nest JS Advanced Course 2024" and we are covering all adv However, seems to be a common paradigm when coming to TypeORM is to generate an in-memory database for any kind of testing purposes. ByteSmith is a precision-engineered boutique software studio that builds scalable, high-performance applications. Use-cases are written in functionnal programming with FP-TS May 3, 2024 · Issue description Transactions don't work in tests Expected Behavior I posted an issue on stackoverflow: I want to write such a unit test file that each time I run it, I run an instance of the enti Jul 17, 2021 · Jest can be used with any javascript application React, angular, nestjs, Vue JS, express. We look at repositories, relations, transactions, subscriptions, migrations & unit test Feb 14, 2021 · In this project, it uses NestJS along with TypeORM. #2569 Mar 5, 2024 · Launch your MVP in 30 days. github: https://github. Aug 28, 2019 · I'm currently taking over a backend written with NestJS, typeorm on Mysql and passport package for authentication. - Basic about testing controller and services - Different ways to Mock service or Providers - Mocking External auth or data services - Nest JS Testing with TypeORM interface - NestJS Testing with Knex or Prisma Dec 1, 2022 · Testing custom repositories Testing custom repositories (NestJS/TypeORM) post covers more details about the unit and integration testing. Nest (or NestJS) is a framework for building efficient, scalable Node. ts import 'r. However, when I run the test I May 14, 2021 · This is where a huge benefit of using dependency injection comes in. Jun 14, 2022 · What was unclear or otherwise insufficient? According to this post, as well as the many others on the internet, testing with Jest is based on creating connections with createConnection and using the ormconfig. First, we implement our unit of work service Jul 11, 2018 · I have a Nest server that other services depends on. the constructor of the class injects an Entity Manager. While I did not test this myself, it does seem to work. May 15, 2024 · This article is a step-by-step guide to mastering end-to-end testing in NestJS applications using TypeScript. Suites (formerly Automock) Suites is an opinionated and flexible testing meta-framework designed to enhance the software testing experience for backend systems. In addition, Nest makes it easy to use the Supertest library to simulate HTTP requests. As far as I know, TypeORM doesn't provide any opinions on testing. In this module, we will dive deep into unit testing and […] May 7, 2020 · I got an app on NestJS in Typescript using TypeORM and unit-tests written with Jest. 0" and other typeorm packages). They actually access the database, performing actual queries and then rolling back the results if necessary. So the first step is to mock the repository "InventoryItem". Jan 12, 2024 · Coupled TypeORM, postgres and Nestjs, I'm struggling a bit to find the problem users. In this article, we look into how we can test our application by writing unit tests. In Discover effective strategies for writing unit tests in NestJS and TypeORM without establishing a database connection. Aug 17, 2020 · I need help adding unit test to the function below in NestJs. In fact it is a dynamic module, there is logic when he is instanciated. What is the logical unit here you're trying to test? Or are you just trying to get to 100% coverage? Feb 22, 2024 · This tutorial is a deep dive into unit testing in NestJS (including mocking with test doubles). Oct 12, 2024 · Testing is an essential aspect of modern software development that ensures your application works as intended. You have to import: May 18, 2020 · When we do it, TypeORM figures out the column using our TypeScript types. One common challenge when writing unit tests for NestJS applications is dealing with database interactions, particularly when using TypeORM as the Object-Relational Mapping (ORM) library or Mongoose module for MongoDB. Tagged with nestjs, jest, typeorm, testing. js with jest. ts @Controller(UrlConstants. 4K subscribers Subscribe Jan 19, 2025 · Writing our first unit tests Let's first start by writing the basic structure to test a service on nest. Using a practical example, you'll gain hands-on experience in setting up a testing environment, defining test cases, and understanding testing Jul 18, 2019 · } } We can useClass: Repository so that we don't have to do any of the heavy lifting of setting up a repository class to use for testing (Repository is imported from the TypeORM package. May 20, 2025 · NestJS + TypeORM is a powerful combination for building scalable backend applications. My module looks something like this. Why Use TypeORM with NestJS? TypeScript Support: Both NestJS and TypeORM are built with TypeScript, providing type safety and improved developer experience. 48K subscribers 335 NestJS TypeORM Mock Repository is a library that provides a mock implementation of the TypeORM Repository class. 🧪 Fully tested NestJS Prisma Clean Architecture Boilerplate - This boilerplate shows how to test your NestJS API with unit, integration and e2e tests. js. Sep 21, 2020 · Assuming you already installed and configured mongoose in your NestJS project. To get the most out of this tutorial, I recommend coding along with running locally to see the tests Aug 18, 2021 · You have @nestjs/testing on version 8, but you're using @nestjs/common, @nestjs/core, and many other @nestjs/ packages down on version 6. It serves as a test-runner and also provides assert functions and test-double utilities that help with mocking, spying, etc. With getMananger() you have to worry about TypeORM trying to get the entity manger from I feel like you've been misled by the article, they are not testing the module, they are testing the forRoot method of the module. All my create code is in a single class, I want to be able to move the code for creation of every entity to be moved to the entity's own service class and expect the transaction rollback still works. Feb 26, 2023 · This post covers TypeORM examples with the NestJS framework, from setting up the connection with the Postgres database to working with transactions. js and there are Jun 21, 2023 · Unit Testing in Nest. NestJS has the solution and proposes a function to do that. In your case it seems that the UserModule you are trying to test is purely configuration, I don't see anything to test from your examples. In most cases, they are functions defined in classes.