[JsonException] Non-backed enums have no default serialization

[innerfly]

What are you trying to achieve?

Run test with dataprovider wich contains non-backed enum

What do you get instead?

When run unit tests and some test is fail, console output get an extra exception in addition to main error:

[JsonException] Non-backed enums have no default serialization

I have explored this and found that exception is thrown for test with dataprovider, contained non-backed enums in example case. When run separately, this test works correctly.
I have debuged PHPUnit and then Codecepton and found place where exception is thow: it is json_encode() call in \Codeception\Test\Descriptor::getTestSignatureUnique() class. When json_encode() try to serialize non-backed enum wich is not serializable, it thows such exception. I assume there should be added checking if example data is serializable.

Details

• Codeception version: 5.1.2
• PHP Version: 8.2.18
• Operating System: Ubuntu 20.04.6 LTS
• Installation type: Composer
• Suite configuration:

actor: UnitTester
bootstrap: _bootstrap.php
modules:
    enabled:
        - Mockery
        - \App\Tests\Helper\SymfonyHelper:
              app_path: 'src'
              environment: 'test'
              debug: false
              rebootable_client: false