How to test nestjs modules?

• jest-create-mock-instance

  2 31 0.0 JavaScript

  Create mock instances with Jest

  Create a mock of the Repository that you're testing, it's the simplest one and the more cumbersome one, you can use a library like jest-create-mock-instance or jest-mock-extended or ts-auto-mock to create a mock from typings, but you're responsible to implement how it supposes to work.

• jest-mock-extended

  3 781 2.8 TypeScript

  Type safe mocking extensions for Jest https://www.npmjs.com/package/jest-mock-extended

  Create a mock of the Repository that you're testing, it's the simplest one and the more cumbersome one, you can use a library like jest-create-mock-instance or jest-mock-extended or ts-auto-mock to create a mock from typings, but you're responsible to implement how it supposes to work.

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• nest-api-example

  4 72 9.7 TypeScript

  Example of an Restful API with Nest.js and TypeORM

  Example: https://github.com/leosuncin/nest-api-example/blob/88cf73a2189c8556c703a2f8b4ff21970d7ffab4/src/blog/services/comment.service.spec.ts

• todo-backend-nest

  1 - -

• pg-mem

  13 1,779 7.0 TypeScript

  An in memory postgres DB instance for your unit tests

  In my case, I use TypeORM with PostgreSQL, and there's pg-mem to run an instance in memory, it supports most of the common functionality of PostgreSQL but you will need to do some adjustment to your code to be within the limits.

• postgres-wasm

  11 2,237 2.8 Shell

  A PostgresQL server running in your browser

  

  Other in-memory alternatives for PostgreSQL embedded-postgres (I haven't tried it yet) postgres-wasm (currently it only runs in the browser).

• jest-mongodb

  2 588 7.4 TypeScript

  Jest preset for MongoDB in-memory server

  

  In the case of MongoDB there's jest-mongodb that use mongodb-memory-server; for other DBMS, I don't know if it's possible to run an instance in memory.

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• mongodb-memory-server

  9 2,447 9.3 TypeScript

  Spinning up mongod in memory for fast tests. If you run tests in parallel this lib helps to spin up dedicated mongodb servers for every test file in MacOS, *nix, Windows or CI environments (in most cases with zero-config).

  In the case of MongoDB there's jest-mongodb that use mongodb-memory-server; for other DBMS, I don't know if it's possible to run an instance in memory.

• testcontainers-node

  26 1,646 8.4 TypeScript

  Testcontainers is a NodeJS library that supports tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.

  

  You can always run a container with a real DB that you can destroy and the re-create whenever you please, use something like docker-compose or testcontainers to run them. Be aware this can be slow and require more resources to implement.

• nest-graphql-example

  3 7 0.0 TypeScript

  Example of GraphQL with Nest.js and TypeORM

  Example: https://github.com/leosuncin/nest-api-example/blob/master/test/auth.e2e-spec.ts https://github.com/leosuncin/nest-api-example/blob/master/docker-compose.yml https://github.com/leosuncin/nest-auth-example/blob/master/test/todo.e2e-spec.ts

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