The increasing number of devices and the growing demands of users necessitate a comprehensive mobile automation testing solution. When it comes to native mobile test automation, one of the most persistent challenges is deciding between testing on real devices and using emulators or simulators
Both approaches present distinct advantages and disadvantages. Finding the right balance between these options is important for teams that want to achieve comprehensive coverage and dependable results. And efficient resource utilization in their mobile testing strategies.
In this article, we will go through a structured approach to the advantages and disadvantages of emulators and simulators and real devices, followed by a practical perspective on the same.
Understanding Native App Automation Needs
While planning for mobile automation testing of native applications, it is essential to know the automation requirements for the application. Native applications are develop separately for iOS and Android. Hence, the testing process should take into consideration the differences between the platforms, various versions of the OS, and various models of devices. Though functional validation and regression testing can be carried out on emulators or simulators. Performance testing and device-dependent scenarios require devices.
Emulators and Simulators
Emulators and simulators are virtual mobile devices that run on a desktop environment. These tools are efficient and cost-effective, but run in a virtual environment that may not accurately represent the physical device.
Benefits of Emulator and Simulator
- Fast Execution- The execution of automated test cases using virtual devices is faster than executing the same test cases using physical devices.
- Low Setup Cost- As the emulator and simulator come bundled with the development tools, the need for physical devices is completely avoided.
- Easy Environment Reset- Virtual devices can be reset or start from a clean environment in a matter of seconds.
- Strong Fit for Early Development- During the development phase, the majority of the problems faced by the development team are due to logical or user interface issues. In such a scenario, the emulator/simulator is the best device for testing the logical or user interface-related aspects of the mobile applications.
Limitations of Emulators and Simulators
- Risk of False Confidence- A program that can run correctly on a simulator may not run correctly on actual hardware. This implies that there is a risk of false confidence if one only relies on emulators and simulators.
- Unrealistic Performance Metrics- Performance metrics obtained from emulators or simulators are based on the host machine, not actual mobile devices. This means CPU throttling, GPU rendering, and memory management may not accurately reflect actual mobile devices.
- Limited Hardware Simulators- Some of the functionalities cannot be emulated include camera processing, biometric authentication, GPS accuracy, and Bluetooth connectivity.
Real Devices
Real device testing involves the execution of test cases on actual devices like smartphones and tablets in a real environment. Unlike the virtual environment, the physical devices deliver actual performance reports and user experiences. Real device testing ensures the validation of hardware-dependent features and performance behavior of devices.
Benefits of Real Devices
- Authentic Performance Data- Automated testing on physical devices is a good way to obtain authentic performance data for the app.
- True Hardware Validation- Features such as the camera, biometric recognition, push notifications, GPS tracking, and other hardware-based features behave realistically on physical devices. This is important for the validation of hardware-based features.
- Accurate Battery and Thermal Behavior- Real devices behave realistically by generating heat and using a battery for the operation of the app. This is important for the validation of the app.
- Greater Release Confidence- Automated regression testing done on physical devices before releasing the app ensures that hardware-related issues do not arise.
Shortcomings with Real Devices
- Higher Costs- When using real devices, there is the cost of maintaining the devices, updating the devices, and replacing the devices when they wear out.
- Slower Execution- There may not be the same level of parallel execution with real devices as there is with emulators.
- More Management Effort with Devices- There is the cost and effort associated with updating the operating systems, connectivity issues, and the devices wearing out.
- More Scalability Shortcomings with Devices- There may be a lack of diversity with the devices, making it difficult to scale the test coverage.
The Balanced Approach
Neither of the environments offers full coverage on its own. Emulators and simulators have their strengths in terms of speed, reproducibility, and development efficiency. Real devices have their strengths in terms of authenticity, hardware validation, and accurate performance measurement.
The balanced approach to mobile automation involves using the strengths of both environments in a layered manner:
- Use emulators and simulators for fast feedback, regression coverage, and frequent validation during development.
- Use real devices for performance evaluation, hardware validation, and final regression before release.
This layered approach to mobile automation offers the efficiency of development while avoiding the risks in production. Speed and authenticity are not mutually exclusive in mobile automation. In fact, they are complementary aspects of a perfect mobile automation strategy.
In native app testing, the most beneficial effect is achieved not by being on one side of the spectrum or the other but by understanding the pros and cons of both and using them accordingly.
Use of a cloud-based environment has made it even simpler to adopt this multi-layered approach. TestMu AI (formerly LambdaTest) makes it easier to perform scalable mobile device testing on real devices in the cloud. This allows the execution of automated test scripts on a massive range of Android and iOS devices without having to set up or maintain any physical device labs.
TestMu AI is an AI testing tool designed for large-scale web and mobile application testing, both automated and manual. It enables real-time parallel test execution by providing access to more than 3000 environments, including real mobile devices, browsers, and operating systems hosted in the cloud.
In the process of choosing between emulators, simulators, and real devices, flexible access to both environments becomes a competitive advantage. TestMu AI helps in this process of decision-making by allowing teams to easily integrate real-device testing into their automation process.
Conclusion
In conclusion, whether to perform test automation on real devices or use emulators and simulators should not be an either-or decision. Emulators and simulators are extremely fast and flexible, and hence very efficient for initial development. Real devices are still required for testing real performance, hardware interactions, and real-world usage scenarios. A complementary automation strategy that takes advantage of both environments will give faster feedback during development and more confidence before release.
Disclaimer:
The information provided in this article is intend for general informational and educational purposes only. The discussion about mobile automation strategies, including the use of real devices, emulators, and simulators, reflects commonly accepted testing practices but may vary depending on specific project requirements, development environments, and organizational resources. Any tools, platforms, or technologies mention are provided as examples and should not be consider endorsements or guarantees of performance.
Teams and organizations should carefully evaluate their own testing goals, infrastructure capabilities, and budget before choosing a testing approach or platform. Additionally, technology features, integrations, and availability may change over time, so readers are encouraged to consult official documentation and conduct independent research before implementing any solution.