Mock for unit test

[luisgustavoo]

Check the possibility of creating mock for unit tests. As printed below.

[medz]

Closing as superseded by the new Dart-native ORM merged in #485. This issue belongs to the retired Prisma-based client or its earlier roadmap. The new implementation uses Dart model declarations, independent drivers and single-engine Dart migrations, with no Prisma engine dependency.

The old implementation is no longer being developed. This closure does not claim that every requested feature or platform has been implemented. Please open a new issue against the new implementation with a current reproduction or focused proposal; see the repository README and capability documentation for the supported scope.

Thank you for the report and discussion.