Web and real device cloud testing has consistently played a crucial role in the comprehensive development process. The testing phase is dedicated to identifying and resolving bugs, ranging from navigation glitches and issues in signup forms to disruptions in payment processing or subtle differences in font size. The primary goal of testing is to ensure that any alterations made do not compromise the user experience across diverse devices.
A fundamental aspect of establishing a robust testing process is selecting testing devices. The outcomes of a meticulous testing procedure may exhibit variations when conducted on different devices. Therefore, the choice of the testing device holds paramount importance. This significance is heightened, particularly when testing on mobile devices, given the diverse array of devices encompassing various operating systems, browsers, and hardware configurations.
Categories of Mobile Testing Device Solutions
As technology has progressed over time, the field of testing has also witnessed advancements in various solutions for mobile testing devices. These solutions were developed to facilitate cross-browser testing for websites and mobile app testing on diverse mobile phones, analyzing the application’s behavior, functionality, and UI aspects.
The primary objective of this type of testing is to ensure the consistent performance of the website and app across different mobile devices. Given the variations in hardware configuration, operating systems, and screen resolution among these devices, what may function in a particular manner on one device could differ.
The main types of devices used for mobile testing are broadly categorized into:
- Real Devices
- Virtual Devices
What constitutes a Real Device?
Real testing devices encompass a variety of mobile handset models employed to execute website or app tests, evaluating their functionality and behavioral characteristics. These devices replicate the actual handsets used by end-users.
Typically, testing teams acquire multiple mobile handsets, including iOS, Android phones, tablets, and iPads, to conduct evaluations of their software applications.
The Transformation of Testing Devices: From Real to Virtual Testing Tools
While the outcomes derived from testing on genuine devices boast high precision, the associated costs, including the purchase and upkeep of multiple devices, present a substantial challenge. In response to this expense hurdle, companies have adopted virtual testing tools, such as simulators and emulators, for cross-browser compatibility testing.
What Constitutes a Virtual Testing Tool?
A Virtual Testing Tool is a software application installed on a computer that, in contrast to a physical device, emulates key features of an actual smartphone device. It replicates the characteristics of a smartphone, allowing testers to execute the software application and gain insights into its performance on the intended real device.
While virtual testing tools efficiently mimic devices and prove cost-effective, they cannot entirely substitute real devices due to accuracy and reliability considerations.
Two primary types of virtual testing tools exist:
- Emulators
- Simulators
Defining Emulators:
An emulator is software designed to replicate the hardware and software of the target device on a computer. This emulation is achieved by translating the target device’s Instruction Set Architecture (ISA) into the ISA used by the computer conducting the testing, utilizing binary translation.
ISA constitutes the set of instructions written in machine language by various processor families to construct their specific device configurations, representing the functionality and behavior of the device.
Translating the ISA from the target mobile device to the computer creates a virtual environment for testing, enabling users to imitate the workings of the target device. However, the near-native capabilities come with the trade-off of latency.
Popular emulators for software testing include the Android emulator, the Galaxy emulator, and the iPhone emulator (commonly referred to as iOS Simulator, though it’s a misnomer).
Understanding Simulators:
A Simulator is a software that facilitates the execution of specific programs designed for a different Operating System. Primarily intended for iPhone and iPad devices, unlike Android devices that can be easily emulated, iOS simulators replicate the iOS environment and run the required applications within it, overlaying the computer’s Operating System.
However, it is important to note that running the iOS simulator requires macOS, limiting its accessibility to MacBook users or those who virtualize macOS on their existing systems. Simulators, distinct from emulators, do not replicate hardware aspects. Consequently, certain functionalities, such as battery usage and cellular interrupts, cannot be investigated using simulators during testing.
Emulators vs Simulators
Emulators and simulators serve the common purpose of being virtual devices that replicate operational behaviors and imitate a user’s actions, yet they differ in their approach.
Emulators replicate real mobile device software, hardware, and OS, creating a testing and debugging environment within another software/hardware platform. On the other hand, simulators imitate the internal behavior of a device without emulating hardware or functioning on the OS.
An analogy can be drawn with a flight simulation: a simulator mimics the operation of a plane through a computer-generated program, showing the procedure, while an emulator would theoretically take you to a destination like a real plane.
In the choice between emulation and simulation, emulation is preferred for its accuracy and suitability for debugging. However, the terms are often used interchangeably due to their similar functions.
Considering the flight simulator example, both instances have variations from boarding a real plane, just as using simulators and emulators differs from using a real device. Real-life factors affecting results are not always considered in a simulation or emulation.
Real Device Testing vs. Virtual Testing Devices: Striking the Right Balance
Emulators and simulators share a fundamental characteristic—they are virtual entities, distinct from real-world testing environments. In the realm of mobile device software, the crucial distinction lies between testing within a virtual environment and conducting tests on real devices.
Real device testing involves installing the latest version of a mobile app on an actual mobile device to assess the app’s functionality, interactions, and integrations under real-world conditions. It is a recommended practice within a comprehensive mobile app testing strategy, particularly when coupled with virtual devices such as Android emulators and iOS simulators.
Emulators and simulators offer faster provisioning compared to real devices, driven by their software nature. They also facilitate parallel testing and automation through external frameworks like Appium, Espresso, and XCUITest.
The parallel testing capability of emulators and simulators surpasses what can be achieved with physical devices in a lab. Because tests on emulators and simulators are software-defined, multiple tests can be simultaneously run on numerous emulators and simulators with a simple click, eliminating the need for manual preparation for each test.
However, a potential pitfall emerges when mobile QA teams exclusively rely on emulators and simulators, neglecting to test on real devices. While this approach accelerates the testing process, it comes with a critical drawback—emulators and simulators cannot fully replicate device hardware.
This limitation hinders the ability to test against real-world scenarios, as issues related to kernel code, device memory, Wi-Fi chip, layout changes, and other device-specific features cannot be accurately replicated on an emulator or simulator.
To optimize mobile testing efforts, a balanced approach is essential, incorporating both real devices and emulators/simulators into the mobile testing strategy. Each option offers distinct advantages—one ensures more accurate test results, while the other provides greater testing agility.
Comparison: Real Testing Device vs. Virtual Testing Device
| Criteria | Real Testing Device | Virtual Testing Device |
| Cost | Acquiring real devices at scale is cost-prohibitive | Minimal cost, often free installations |
| Reliability | Real devices provide accurate results in actual conditions | Virtual devices mimic devices but lack real user conditions |
| Processing Speed | Faster software testing on real devices | Slower software testing on virtual devices due to binary translation |
| Suitable for Debugging | Debugging with real devices may be tricky | Virtual devices offer easy step-by-step debugging with defect capture features |
| Cross-Platform Testing | Cross-platform testing can be conducted using real devices | Seamless cross-platform testing using virtual devices |
Optimizing the Utilization of Mobile App Testing Devices
With access to all three types of devices and considering the substantial expenses associated with procuring real devices, it becomes essential to streamline the testing process for maximum efficiency.
To achieve this optimization, a balanced approach involves creating a blend of emulators and real devices, utilizing each according to its specific strengths and scenarios. However, it is crucial to note that relying solely on emulators for comprehensive testing is not advisable. Real devices should always be integral to the testing mix when undertaking mobile app testing.
Returning to our assessment, emulators and real devices exhibit efficiency, each in its designated domain. For example, if the objective is to conduct UI testing on the application, real devices, and emulators yield similar results. Therefore, opting for emulators can expedite this process. The same principle can be applied to usability testing, particularly when the goal is to analyze user observations and navigational patterns.
LambdaTest is an AI-powered test orchestration and execution platform for digital experience testing. Its real-device cloud support provides comprehensive mobile app testing on genuine devices. LambdaTest integrates with widely used frameworks such as Selenium, Cypress, and Appium, enabling efficient automated testing.
Leveraging the capabilities of these frameworks, users can effortlessly craft automated test scripts applicable across diverse devices and operating systems. This capability ensures the thorough verification of consistent application performance and functionality, ultimately delivering a superior user experience.
Conclusion
Striking a balance and maximizing the utility of available options involves selecting between emulators, occasionally incorporating simulators, and utilizing real devices. Their individual strengths and performance capabilities guide the decision on which option to choose in specific scenarios. It is essential to note that, while it is possible to execute all testing procedures on a real device, it may not always be the most efficient choice in terms of time and cost.
