Trait "JMac\Testing\Traits\AdditionalAssertions" not found

It sounds like you're encountering an issue with a missing trait from the jasonmccreary/laravel-test-assertions package. Here are the steps to resolve this issue:

1. Ensure the Package is Installed: First, make sure that the jasonmccreary/laravel-test-assertions package is actually installed in your project. You can do this by running:

   composer require jasonmccreary/laravel-test-assertions --dev
   

   This command installs the package and ensures it's only included in your development environment.

2. Check the Namespace: Verify that the namespace used in your test files matches the namespace provided by the package. It seems like there might be a typo or an outdated reference in your tests.

3. Update Your Test File: In your test file, make sure you are using the correct namespace and trait. Here's how you might include it:

   use JMac\Testing\Traits\AdditionalAssertions;
   
   class YourTest extends TestCase
   {
       use AdditionalAssertions;
   
       // Your test methods here
   }
   

4. Autoload Dump: Sometimes, the composer autoload files might be out of sync, especially after adding new packages. Run the following command to regenerate the autoload files:

   composer dump-autoload
   

5. Run Your Tests Again: After making these changes, try running your tests again:

   php artisan test
   

If you follow these steps and still face issues, double-check the documentation for the jasonmccreary/laravel-test-assertions package to ensure there haven't been any changes or deprecations related to the AdditionalAssertions trait that you might have missed.