Do you think running integration tests is a pain and takes a lot of time waiting for the testing stage to complete? Let me give you a little hint on how you can change that. I'll show you how to run 3,000 tests in ~2-3 minutes in this repo. Take a look at the pipeline at the Integration tests step.
The repository serves as an example of how to run integration tests. Here, you won't find examples of building the application structure or any accepted coding practices. The purpose of this repository is to present my approach to running integration tests for developers of different seniority levels who use NestJS and TypeORM.
The tested application is a simple service with CRUD operations, and we will be testing the app integration with the database. All CRUD operation examples are illustrative and kept as simple as possible. They do not address issues of data consistency, atomicity, and other nuances involved in developing modern applications to avoid overcomplicating the application. Once again, I emphasize that the goal is not to present coding practices but to show the idea of running tests.
The main effort in running tests goes into:
- Initializing the application;
- Preparing the state;
- Managing the state.
In this application, I have tried to minimize these efforts. In the test environment, the application is started only once, and all test cases are wrapped in a transaction to manage the state of the database.
Of course, the time spent on running tests will vary since in this example, we are testing on a database with a minimal number of records. However, you can contribute to this repository to make it more realistic.
If you liked this implementation, don't forget to put your ★ to this project.
To clone the repository:
git clone https://github.com/pashak09/nestjs-storm-integration-testsTo install the packages:
yarn installTo generate tests:
yarn tests-duplicatorRun database container
docker-compose -f docker-compose.test.yml up -dTo run the tests:
yarn test:integration