![]() ![]() You can run coded tests quickly and as often as you like. Short cycles require automated tests, which replace the manual tests with program code. ![]() It would be impossible to manually retest every feature every few days. In contrast, the short cycles inherent in continuous development require that each part of the software be frequently revisited as its functionality is improved and extended. As noted, the slightest change demands a full retest, so if you test everything manually, this requires a great deal of effort and resources. ![]() For this reason, traditional development teams don’t like changing any component that has been written and tested. Dependencies in software typically form a complex weave, and bugs notoriously turn up in features that seem unrelated to the focus of the update. When application code changes, it’s prudent to retest everything that might depend on it. An experienced tester applies a variety of strategies to expose bugs and explores all the variants and edge cases of the application’s behavior. The most effective way to do this is to run the application manually and exercise each story just as the end users will. The essential role of testing is to demonstrate that user stories and other requirements have been implemented. In particular, these new tools and techniques aim to reduce the bottleneck that testing has traditionally caused in this loop. The improvements in the testing process we discuss here are all aimed at reducing the time it takes to cycle through the DevOps loop. In particular, they need to make each activity in the cycle more efficient, removing any roadblocks that hinder progress around the loop. In this much more rapid cycle, it’s important for development teams to think about the DevOps cycle as a whole process. At the end of the trial period, they adjust the details of how the feature works. By contrast, in a modern Web application, the first release might be minimal, but extensions and improvements are released every few weeks (or even days).įor example, the managers of a social-networking site might try a new feature for a week, during which they monitor how customers use it. The first release typically is rich in features, delivered on a DVD and installed on users’ local machines. In a traditional software project, each cycle can take years. This process, known as the DevOps cycle, is illustrated in Figure 1.įigure 1 The Continuous Development Cycle Feedback is obtained from the stakeholders, improvements or extensions are planned, and eventually a new version is released, whereupon the cycle starts again. The DevOps Cycleįew software projects come to an end when the software is deployed and running. In this article we show how Microsoft Visual Studio 2012 supports testing in a continuous development environment. This means that tests eventually must be automated, even if they begin as manual explorations. But repeating a full suite of manual tests every few days is impossible. For example, it’s in the nature of software that even the smallest change requires everything to be retested. To support continuous development, every aspect of the development cycle must be more efficient and lightweight than more traditional development processes. Web applications are typically updated or extended every few weeks (or even days) in reaction to shifting business needs and customer feedback. Volume 27 Number 09 Visual Studio 2012 - Testing for Continuous Development ![]()
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