Testing Validation Attributes with xUnit

To test the validation of data models for REST API Controllers, just creating an instance of the controller class and calling the intended method is not an option. It simply does not test the validation, it skips the validation. We need a real REST Call but we need it from our xUnit test, not a manual call when starting the application manually. Two packages (Refit and IntegrationFixture) can help us with that and this article explains how.