How do you validate a feature flag's behavior in Trusted Tester?

• A. Test with flag both on and off, verify gating logic, fallback behavior, and user experience consistency.
• B. Test with flag on and off, verify gating logic, fallback behavior, and user experience consistency.
• C. Ignore gating logic.
• D. Only test the UI color changes.

Answer: (B)

The key idea is to validate a feature flag by exercising both states and checking three things: gating logic, fallback behavior, and user experience consistency. By switching the flag to on, you verify that the feature is activated where intended and that the gating logic enables the new functionality for the right users or conditions. By switching it to off, you ensure the feature is hidden or disabled and that the system reverts to the expected baseline behavior. You also test fallback scenarios where flag evaluation cannot be performed, confirming a safe, predictable default is used. Finally, compare the user experience across states to ensure consistency, with no surprising changes in behavior, layout, or performance. This comprehensive approach catches issues that would be missed if only a single state were tested or if you focused solely on superficial changes like UI color. The other options miss essential parts: ignoring gating logic leaves how features are exposed unverified, and testing only UI color changes ignores the actual feature gating and fallback paths.