When testing a mobile SDK, it's essential to differentiate between testing the SDK itself and testing a mobile app that has the SDK integrated. Mobile SDK testing focuses on ensuring the core functionality of the SDK works under diverse scenarios while minimizing its impact on the host app's UI, UX, and performance. This requires considering factors such as platform and version support, locale adaptation, resource efficiency, and compatibility with other SDKs. The primary goal is to make developers' lives easier by providing a simple integration process, rock-solid stability, and high-quality code that enhances the host app's features without compromising its performance or user experience.