Скачать или смотреть How to Unit Test prepareForValidation in Laravel Form Request

Learn how to unit test the `prepareForValidation` method in your Laravel Form Request, ensuring password generation only on POST requests.
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How to Unit Test prepareForValidation in Laravel Form Request

When working with Laravel's Form Requests, one of the useful methods is prepareForValidation. This method allows you to manipulate the incoming request data before running validation rules. However, developers often face the challenge of how to effectively unit test this method, especially when it comes to conditional logic based on the request method (like POST or PATCH).

Understanding the Problem

Imagine you have a situation where an admin can create users, and during this process, you want to generate a random password for each new user. However, for existing users being updated through a PATCH request, you don't want to modify their password. This requires specific handling in your prepareForValidation method.

Here's the critical logic to consider:

When handling a POST request, a password must be generated and set in the request.

When handling a PATCH request, the password should not exist in the request dataset.

The Solution

The solution involves creating unit tests that specifically verify that the desired behavior of prepareForValidation is achieved—adding a password for POST requests and unsetting it for others.

Setting Up Your Test Class

You can set up your test like this:

[[See Video to Reveal this Text or Code Snippet]]

Breakdown of the Tests

Testing Password Generation:

We create a new instance of AdminUserRequest and then set its method to POST.

Using Laravel's Hash facade, we mock the make method to return a predefined hashed password.

After calling the prepareForValidation method, we assert that the request now has the expected password.

Testing Password Unsetting:

Similarly, we instantiate AdminUserRequest, but this time we set the method to PUT (or any other method that isn't POST).

After invoking prepareForValidation, we check that the password is not set in the request data.

Conclusion

Unit testing the prepareForValidation method in Laravel's Form Requests is crucial for ensuring the integrity of your application's data handling. By following this structured approach, you can effectively verify that your password management logic functions correctly based on the request type.

With these tests in place, you are now equipped to confidently manage the lifecycle of request validation in your Laravel application. Happy coding!