Interrupt Testing in Mobile Application

Ensuring the proper application’s performance is essential for providing exceptional experience to the end-users. In the modern development skyline, testing teams include dozens of different testing methodologies to check the reliability and effectiveness of the developed solutions.

However, we will examine a pretty unusual method in today’s article. This method aims to check not only the app itself but also its ability to function correctly in unpredictable circumstances. So, let’s not waste another minute finding out the benefits of this unusual testing technique, which hides beneath its complex appearance.

What Is Interrupt Testing?

The interrupt testing technique is a methodology that ensures the correct behavior of the application when it’s interrupted by external events. Those external events may include phone calls, notifications, network crashes, and anything else that can interrupt the regular flow of the program’s logic.

The importance of interruption testing is crucial since it helps the developers ensure that the product will be able to handle unexpected situations without crashes or data losses. The main difference with other testing types lies in the fact that the interrupt test focuses on checking the ability of the app to withstand possible issues instead of checking the overall functionality or effectiveness. As a result, the team can drastically enhance the reliability and stability of the developed product.

The Importance of Interrupt Testing

The cruciality of interrupt testing lies in its ability to ensure the correct functioning of the tested application even when it faces unpredictable disruptions. Given the frequent nature of such disruptions, interrupt testing plays have some additional reasons that make it so important in the overall product performance. Below, we would like to provide you with some of those reasons.

• Preventing system instability. Interrupt testing helps to detect issues that can cause possible issues, freezes, or any unpredictable application behavior.
• Improves system efficiency. This testing type also greatly adds up to CPU utilization without unnecessary overhead.
• Enhances system security. It also helps identify security bottlenecks that can be exploited for malicious reasons, such as denial-of-service attacks.

Types of Interrupts

Interruptions are the specific events that can disrupt the system’s normal behavior. Interrupts are more common than you might think because they frequently occur in smartphones, computers, and other systems through unexpected calls or even simple notifications.

There are many types of interruptions, and their understanding and correct classification can help to ensure the smooth operation of the developed systems. Below, we would like to provide you with some primary interruption classifications.

System Interrupts

System interruptions are events the operating system or hardware triggers and require immediate attention. Here are some examples of system interrupts.

• Incoming calls. Common interrupt that can disturb the current task or application’s logic due to the pause of the application or minimization of the CPU usage for the program.

• SMS messages. Another common interruption can lead to the user’s distraction from the activity or even halting the current session.

• Notifications. Alerts generated by the system can distract the users from their current application session or simply delay the completion of the action inside the software.

• Low battery alerts. It frequently occurs among mobile application users, who are interrupted by notifications regarding the battery’s state. This leads to halting usage due to the required actions for managing the device’s state.

• Changes in network connections. Fluctuations in the network status, like changing the network or switching from WI-FI to mobile data, can significantly influence processes like streaming or downloading speed.

User-Initiated Interruptions

Unlike system interruptions, this disruption type is caused by the user himself. In this paragraph, we would like to present some common user-initiated interrupt types.

• Pressing the home button. This simple action leads to the minimization or halt of the current application’s processing and also causes the scattering of the user’s attention.

• Pressing the power button. Pressing the power button leads to the incorrect session termination, switching to sleep mode, or shutting down the device.

• Pressing the volume button. Interaction with the volume button can also lead to media playback interruption or a halt of the ongoing session.

• Switching to different apps. Switches between the different applications influence the system’s focus from the previously active app to a new program, which causes state persistence or performance drawbacks.

Interrupt Testing Methods

The process of interrupt testing can be approached either manually or automatically. Each of those approaches has a set of unique benefits and drawbacks. Understanding the key characteristics of those approaches is crucial for ensuring a proper interrupt testing routine that will benefit your app’s overall performance.

Manual Testing

Manual checks in the interruption testing routine focus on the simulation of various disruptions, like interaction with buttons of the device, changes in the network connections, and receiving incoming calls or notifications. During this routine, the specialist triggers each event manually and checks the system’s output for the triggered event, ensuring that the program functions correctly after the unpredicted action.

However, while this testing method is excellent for checking complex and unusual scenarios, it might become fiddly for scaling. In addition to the bias to human errors and the time-consuming essence, manual testing might become less effective for large or repetitive scenarios.

Automation Testing

Automated interruption testing leverages various tools and scripts to verify the proper system’s response without direct human intervention. In automated testing, the whole process happens in specific frameworks, where interrupts are triggered automatically, with the further login of the received response and its comparison with the expected behavior.

The automation approach offers many benefits, such as speed, repeatability, and consistency, especially in test scenarios with various complex interrupts. However, the initial setup of the testing routine may be time and finance-consuming and might not be great for unforeseen case tests.

Standard automated tests include initiating messages or calls to check if the system responds correctly or the app’s behavior during the network switches.

Interrupt Testing Best Practices

By following the best practices, testers can create proper conditions to enhance the effectiveness of the testing routine. Below, we gathered the best practices for ensuring adequate interrupt checks that will maintain the proper stability of the system and will not compromise the user’s experience.

• Comprehensive test plan. Creating a clear and precise plan is the first step to success. Make sure to define the scope of the process, including the factors that must be checked, and do not forget about the specifications of the testing environment, approach, version, and everything necessary.

• Prioritize test cases. Prioritization is a key to successful interrupt testing. Therefore, critical and complex functions should be focused on during the formation of the testing plan. Make sure to carve out enough time for tasks with sensitive data or anything else that might take increased attention from the tester’s team.

• Collaborate with developers. Close collaboration with the developer’s team is another helpful practice that will help you increase the efficiency of interrupting testing. This communication will allow you to gain great insights regarding the target zones of the interrupt testing routine.

• Update test cases regularly. Review and upgrade your testing approaches frequently. It will help the team to reflect on the possible changes, new features, or any differences in the latest versions of the product so that interrupt tests will remain aligned with the evolving product.

Tips For Effective Interrupt Testing

It’s not enough to simply follow the basic templates and practices to achieve great results. It’s necessary to adjust your test scenarios according to the unique circumstances of your project and follow some profound tips that have proven their worthiness in real-world cases.

• Use real-world scenarios. Make sure to create interrupt patterns that align with the regular behavior of your actual end-users. It will help to receive maximum efficiency from the simplest interrupt test.

• Use multiple devices and OS versions. Do not focus on a single device or OS. Make sure to spread your attention evenly across various devices and operational systems to ensure the full coverage of your testing scenarios.

• Check the application state. Run the tests in various application states, such as foreground, background, or suspended, to ensure the app responds properly in all scenarios.

• Monitor behavior and performance. Look for crashes, bugs, or issues during interruption testing. Early drawback detection will help you resolve the problem with minimal time and resource loss.

• Document testing results. Remember to carefully document the received data. This will help you track the progression of your interrupt testing and adjust the process if necessary.

Conclusion

Interruption testing remains one of the most crucial aspects in delivering an effective and convenient experience to your end-users. Given the frequent and unpredictable occurrence of interruptions in the life of modern users, it’s necessary to pay enough attention to the interrupt testing routine throughout the entire development cycle. By doing so, you can drastically increase the effectiveness of the developed software and positively change the perception of your product by your customers.