How to test Yii applications?

@adan 

There are several approaches to testing Yii applications. Here are some of them:

1. Unit testing: Yii comes with a built-in unit testing framework, PHPUnit. You can use it to test your code and make sure that individual components work as intended.
2. Functional testing: To test the behavior of your application as a whole, you can use functional testing. Yii provides a functional testing framework that allows you to simulate user interactions and test the application's responses.
3. Acceptance testing: Acceptance testing is used to test the application's functionality from the end-user's perspective. You can use Yii's acceptance testing framework to automate user interaction and test the entire system, including the user interface.
4. Load testing: Load testing is used to test the application's performance under heavy loads. Yii provides tools to help you create load-tests, and you can use external tools to simulate high-concurrency usage.
5. Manual testing: Manual testing involves testing the application manually by running it and checking its behavior. This can be useful for testing edge-cases or when testing user experiences that cannot be easily automated.

Overall, testing Yii applications involves a combination of different testing approaches, each with its own advantages and limitations. By using different testing methods, you can ensure that your application is well-tested and ready for production.