To start unit testing for the project, we need to utilize a testing framework. In the case of NestJS, a popular choice is Jest.
First, we need to install Jest as a dev dependency using the following command:
npm install --save-dev jest
Next, we will create a tests directory in the project root which will contain all our test files. Inside this directory, we can start writing unit tests for our application modules, controllers, and services.
For example, let's say we have an app.service.ts file in the src directory which contains the logic for our application service. We can create a corresponding app.service.spec.ts file in the tests directory to write tests for this service.
In the app.service.spec.ts file, we can import the necessary modules and use Jest's testing functions to define and run our tests. Here's an example of a basic unit test for the AppService:
import { AppService } from '../src/app.service';
describe('AppService', () => {
let appService: AppService;
beforeEach(() => {
appService = new AppService();
});
it('should return
To start unit testing for the project, we need to utilize a testing framework. In the case of NestJS, a popular choice is Jest.
First, we need to install Jest as a dev dependency using the following command:
Next, we will create a
testsdirectory in the project root which will contain all our test files. Inside this directory, we can start writing unit tests for our application modules, controllers, and services.For example, let's say we have an
app.service.tsfile in thesrcdirectory which contains the logic for our application service. We can create a correspondingapp.service.spec.tsfile in thetestsdirectory to write tests for this service.In the
app.service.spec.tsfile, we can import the necessary modules and use Jest's testing functions to define and run our tests. Here's an example of a basic unit test for theAppService: