To run unit tests in an Angular application, you typically use the Angular CLI (Command Line Interface), which is a powerful tool that simplifies many tasks in the development workflow, including testing. Here’s a step-by-step guide on how to run unit tests in Angular:
Set Up Your Angular Environment:
Ensure that you have the Angular CLI installed. If it's not installed, you can install it globally using npm (Node Package Manager) by running:
npm install -g @angular/cli
Navigate to Your Project Directory:
Open a terminal or command prompt, and navigate to the directory of your Angular project where you want to run the tests.
Run the Tests:
Execute the following command in the terminal:
ng test
This command initiates the Karma test runner, which is configured by default when you create a new Angular project using the Angular CLI. Karma launches a browser instance (commonly Chrome) and runs the unit tests written in your project[14][17][18].
View the Results:
The results of the tests will be displayed in the terminal or command line interface. Karma also opens up a browser window where you can see if the tests pass or fail, along with other detailed information such as logs and errors.
Optional: Continuous Testing:
By default, the ng test command will keep watching for any changes in your files and re-run the tests whenever you save changes. This is very useful during development to get immediate feedback on your changes.
Code Coverage (optional):
If you want to generate a code coverage report to see how much of your codebase is covered by tests, you can run:
