This is a test project to implement and test this Symfony Messenger pull request.

1. Install dependencies: composer install
2. Create the database (sqlite by default): bin/console doctrine:database:create
3. Migrate database: bin/console doctrine:database:migrate

Use the app:add-book command to run tests. The command requires an ID and Name for the book.

• For success: Use a unique ID: `bin/console app:add-book {uniqueId} {some name}
  • On success you should see a VarDump of the BookCreatedEvent with the new book's ID.
• For failure: Reuse an ID: bin/console app:add-book 1 foo && bin/console app:add-book 1 foo
  • On failure, you should not see the VarDump (which is located in the Event Subscriber)

The files for the Messenger transaction middleware are in App\Lib\Messenger.