Which of the following is NOT a typical property to ensure in tests?

The property that is not typically focused on when ensuring tests are designed effectively is the aspect of data backup and restoration. In the context of testing, especially within applications or software development, tests are primarily concerned with verifying that the application behaves correctly under various scenarios, such as handling positive and negative behaviors, managing user permissions and access, and testing single versus bulk actions.

Including scenarios such as positive and negative behaviors allows testers to ascertain how an application responds to expected inputs and unexpected or erroneous inputs. User permissions and access ensure that the application functions as intended for different user roles, which is crucial for security and usability. Testing single versus bulk actions is important to evaluate how the application performs under different loads and to detect any potential performance issues.

Conversely, while data backup and restoration are vital processes for maintaining data integrity and security in a live environment, they are not typically part of the testing scenarios. The testing phase is more focused on verifying that the system operates correctly rather than the backup and restoration processes, which are generally handled separately within operational procedures. Therefore, emphasizing backup and restoration during testing would not align with standard testing practices.