Selecting the Right Mobile Test Automation Strategy: Challenges and Principles
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The document discusses the challenges and principles of selecting an effective mobile test automation strategy to improve testing processes for mobile applications. It highlights the necessity of ensuring quality across diverse platforms and networks amidst rapid technological advancements, while emphasizing the importance of both functional and nonfunctional testing. Additionally, the paper outlines key challenges and best practices for automating mobile testing, advocating for a tailored approach to optimize application performance in an increasingly competitive mobile market.
Selecting the Right Mobile Test Automation Strategy: Challenges and Principles
- 1. Selecting the Right Mobile Test Automation Strategy: Challenges and Principles By choosing the tools and automation processes best-suited to testing mobile apps, QA organizations can reduce complexity and speed time to value. Executive Summary The mobile phone has transitioned from its tra- ditional role as a mere communications medium to that of an essential multipurpose personal gadget. Consider that the number of smartphone users worldwide will surpass two billion in 2016, according to new forecasts from eMarketer.1 Meanwhile, technological advancements and the proliferation of devices across platforms and operating systems (Apple iOS, Android and Windows Mobile) have made it more challeng- ing for hardware manufacturers and application developers to develop and roll out new products. For vendor peace of mind, mobile applications must be tested to ensure they run on key platforms and across a multitude of networks. Despite the pressures of short mobile development cycles, it is necessary to quality-test applications across operating systems, device platforms and networks in order to ensure long-term success in a highly fragmented and competitive global market. Moreover, nonfunctional testing — including usability, security and adaptability — is as critical as functional testing. Effective testing can help device makers and application developers collect appropriate metrics that improve product quality. This white paper explores industry best practices for mobile testing and demonstrates effective ways to manage mobile application quality through test automation. As with con- ventional applications, there is an increased need to automate mobile applications testing to improve scale and efficiency. A well-orchestrated automation strategy enables hardware manufac- turers and software developers to reduce their efforts and accelerate time to market. Key Challenges in Application Test Automation The primary factor that determines an automation tool’s success is its ability to work across platforms and technology stacks. It is also important that the tool integrates lifecycle aspects such as continuous integration to enable quicker release cycles. The following challenges influence automation success: • Device diversity: Multiple platforms and browsers, rendering differences, mobile devices with varied application runtimes. • Platform challenges: Frequent platform updates and releases, customization of plat- forms by OEMs. cognizant 20-20 insights | march 2015 Cognizant 20-20 Insights
- 2. End-to-end QA Test Automation Scriptless Scripting Parallel Automation Execution Continuous Integration • App technology challenges: The diversity of app development technology; rapid oscillation of adoption between native, Web and hybrid technologies; emergence of responsive Web technologies. • Network challenges: Multiple network types (e.g., GSM, GPRS, Wi-Fi, Wi-Max); different speeds of connectivity across geographies; multiple network operators with customized network features. • Hardwarechallenges:Limitationsinprocessing speed, limitations of mobile memory size, dif- ferences in device communication protocols (e.g., WAP, HTTP). Test Execution Expectations Executing tests across different devices and browsers is a cumbersome and challenging exercise. The expectations from an automation tool are limited not only in terms of cross-platform application, but also with regards to ease of usability, integration and rapid execution (see Figure 1). Some of the key imperatives include: • End-to-end QA automation: The ability to address functional, nonfunctional and integra- tion test scenarios. • Scriptless automation: Test automation for mobile apps with minimal learning. • Parallel automation: Automated test execution across multiple devices and platforms for increased ROI. • Continuous integration (CI): Daily execution of automated scenarios in Agile and CI environments. Mobile Testing Industry Opportunities In the growing mobile market, the need for spe- cialized mobile testing is growing. The following three opportunities contribute to almost 80% of the total market demand. • Mobile automation testing: Available automa- tion tools offer diverse capabilities for a combi- nation of technologies. The best approach can be identified on a case-by-case basis. • Functional testing using device labs, cloud labs: Mobile functional testing always involves a non-heuristic component that cannot be automated. However, use of device cloud labs is a widely adopted strategy that offers quicker turnaround and reduced spend on infrastructure. • Mobile performance testing: Compared with a desktop/notebook environment, mobile device system resources (e,g., processing power, memory, etc.) are limited. Also, mobile traffic has outgrown desktop traffic in terms of online Real-time Expectations from Smartphone-based App Automation Figure 1
- 3. cognizant 20-20 insights 3 access, so performance testing of mobile appli- cations is crucial. In addition to performance, security testing is crucial, as there is a high adoption of mobility in the banking, insurance and healthcare domains, all of which involve sensitive customer data. Mobile Automation: What and Why? Mobile applications are becoming increasingly sophisticated, which has significantly increased the requirement for end-to-end testing. To tackle this, test organizations are exploring alternatives to traditional manual testing. Automated testing is a highly effective approach that can offer sig- nificant business returns, as long as it is imple- mented using the right tools and architecture, factoring in cross-platform challenges. In such a scenario, the following specific types of testing also need to be automated (see Figure 2): • Cross-platform compatibility testing: This is necessitated by the growing number of handsets and platforms. • User experience testing: Most testing organi- zations have limited experience with the design and execution of usability tests. • Field or network testing: Testing must be performed in a geographically distributed envi- ronment to account for the variety of network types. • Location-based testing: These are tool sets that automate application response across various locations. • App store certification: This is a pre-certifica- tion of repeated app store checks required for leading app stores. Test Automation Mechanisms for Mobile Apps A mobile app or responsive Web site rendered on mobile can be automated in one of the following ways: • Web-based automation: This approach is specific to the mobile Web. It leverages user agent add-ons that come with popular browsers such as Mozilla Firefox and Google Chrome. These user agents help render the specific Web content that is displayed on the device onto a regular desktop browser. The functionality can be automated by using license-based and open source solutions. • Cloud-based automation: Cloud-based test automation vendors support Web-based QA across platforms. Cloud-based solutions also offer integration with open source automation libraries. • Lab-based automation (devices and simula- tors): This method involves setting up tools in a test environment and leveraging simulators or physical devices to automate testing using popular commercial and open source tools. 1 Interruption Testing Network Testing Compliance Testing Location-based Testing App Certification Guidelines Additional Areas of Automation in End-to-End Mobile Application Testing Figure 2
- 4. Open Source and Platform-specific Tools The reliability of device platform-specific tools is a high priority. While platform vendors and open source tools prove to be good options, clients require additional programming skills to leverage them effectively. Cognizant Tools We offer a built-in platform to easily automate testing of mobile native and Web apps, and perform end-to-end automation across platforms and devices, simulators and cloud topologies. The platform enables scriptless automation, as well as seamless integration with device cloud and CI systems, thereby ensuring world-class mobile QA. Mobile App Testing Tools Selection Criteria There are many ways to improve the effectiveness and efficiency of testing applications on mobile devices. It is essential to ensure functional and nonfunctional compliance of mobile applications on devices and mobile automation. It is also impor- tant to establish labs for testing mobile applica- tions. Some basic criteria for mobile app testing include the use of emulators, multiple browsers, different platform versions and mobile-specific scenarios for GUI, field and interruption testing. One best practice is to start with a proof of concept (PoC) on a critical platform prior to narrowing down to a particular tool or toolset, as one tool may not achieve your cross-platform automation goals. When test automation tools are evaluated, organizations must not overlook the integration of test management with device cloud environments. A starting point is to identify reusable scenarios across platforms, group them accordingly and map each appropriate phase in the app devel- opment lifecycle to leverage the benefits of the appropriate and time-saving framework. For mobile apps, critical test cases can be run across releases as automation candidates to ensure cross-platform reusability and multi-browser com- patibility. It’s important to consider the different form factors when determining test coverage, especially for the mobile Web. Also, consider the different aspects of connectivity for automation execution runs. In addition, there are 10 key principles that need to be considered when selecting the right tool: 1. Perform tool feasibility tests, as mobile tech- nologies and platforms vary. 2. Select tools that support both platform simulators and devices, because you can mix and match devices and simulators to optimize runs on different platforms. 3. Aim for automation in nonfunctional areas, such as interruption and hardware scenarios that include battery state changes. 4. Always optimize platform support; in some cases, there may be a need for one or more tools to perform automation. 5. Identify multiple device and version support. 6. Ensure ROI for each of the mobile platforms and duration of execution as a part of the tool consideration process. 7. Look for avenues for early automation because most mobile projects are Agile. 8. Ensure integrated execution with the test management tool. Application lifecycle man- agement is an important success factor. 9. Look for data-driven automation support; iterations in execution will increase coverage and ROI. 10. Good candidates for automation are test cases that have repeated business logic, functional flows or data-driven tests, such as smoke testing and build acceptance testing, regression testing, synchronization testing, compatibility testing, GUI testing and non- dynamic UI components, as well as cross-plat- form functional testing. Moving Forward The principles and success factors of test automation for mobile applications are much different from those applied traditionally to con- ventional applications. The attributes of devices, environment, toolsets and test coverage add layers of complexity. This requires keen insight and a customized approach for a well-orchestrat- ed automation strategy. Using these best practices, organizations can set test automation goals and choose the appropri- ate coverage and toolsets for a comprehensive approach. Making automation effective and efficient yields cost and time reductions in the app development lifecycle. cognizant 20-20 insights 4
- 5. About Cognizant Cognizant (NASDAQ: CTSH) is a leading provider of information technology, consulting, and business process outsourcing services, dedicated to helping the world’s leading companies build stronger business- es. Headquartered in Teaneck, New Jersey (U.S.), Cognizant combines a passion for client satisfaction, technology innovation, deep industry and business process expertise, and a global, collaborative work- force that embodies the future of work. With over 75 development and delivery centers worldwide and approximately 211,500 employees as of December 31, 2014, Cognizant is a member of the NASDAQ-100, the S&P 500, the Forbes Global 2000, and the Fortune 500 and is ranked among the top performing and fastest growing companies in the world. Visit us online at www.cognizant.com or follow us on Twitter: Cognizant. World Headquarters 500 Frank W. Burr Blvd. Teaneck, NJ 07666 USA Phone: +1 201 801 0233 Fax: +1 201 801 0243 Toll Free: +1 888 937 3277 Email: inquiry@cognizant.com European Headquarters 1 Kingdom Street Paddington Central London W2 6BD Phone: +44 (0) 20 7297 7600 Fax: +44 (0) 20 7121 0102 Email: infouk@cognizant.com India Operations Headquarters #5/535, Old Mahabalipuram Road Okkiyam Pettai, Thoraipakkam Chennai, 600 096 India Phone: +91 (0) 44 4209 6000 Fax: +91 (0) 44 4209 6060 Email: inquiryindia@cognizant.com © Copyright 2015, Cognizant. All rights reserved. No part of this document may be reproduced, stored in a retrieval system, transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the express written permission from Cognizant. The information contained herein is subject to change without notice. All other trademarks mentioned herein are the property of their respective owners. About the Author Ramakrishnan Venkatasubramanian (Ram) is a Technology Leader in Cognizant’s Quality Engineering & Assurance Practice. As a part of the Technology Center of Excellence, Ram leads Digital Technology, including R&D, mobility QA, service virtualization and the Internet of Things QA. Ram has over 15 years of experience in the information technology industry, with experience spanning software development, product engineering, test automation, mobility, cloud, the Internet of Things and technology consulting. Ram can be reached at Ramakrishnan.Venkatasubramanian@cognizant.com. The author would like to thank Pradeep Kumar Govindasamy for his contributions to this white paper. About Cognizant’s Mobile Testing CoE Cognizant’s Mobile Testing Center of Excellence (CoE) has played a pivotal role in delivering strategic mobile testing programs for 350-plus customers. With a wide range of mobile technologies, the practice specializes in mobile consulting, research on cutting-edge mobile technology solutions, developing frameworks, solution accelerators and best practices for end users. The Mobile Testing CoE features a strong pool of certified mobile testing experts, built using long-term competency development programs. In addition, it houses new tools and technology powered by a focused R&D team, which takes mobile application testing to a whole new dimension. Footnotes 1 “Two Billion Consumers Worldwide to Get Smart(phones) by 2016,” EMarketer, Dec. 11, 2014, http://www.emarketer.com/Article/2-Billion-Consumers-Worldwide-Smartphones-by-2016/1011694. Codex 1235