Today’s business world operates in a state of constant change. What the customer wants to buy changes quickly, new competitors appear overnight, and cyber threats are changing faster than ever. In this world, the concept of “resilience,” the ability to adapt, to overcome, and to continue to create value for the enterprise despite the changes, has become a top-level imperative for cybersecurity and technology executives. DevOps, the cultural and technical movement to unify the software development and operations disciplines, has come of age as a key enabler of business resilience. Bridging the Dev and Ops Divide: A Culture of Resilience Before DevOps, many organizations were stuck in a cycle of slow releases and siloed teams. Developers would work in isolation for months before handing code off to QA and operations teams for deployment. This adversarial approach to software development hindered innovation within organizations such as Amazon, Netflix, and Google until they adopted a De...
Teams spend a lot of time on regression testing . They write scripts to confirm that existing functionality still works after changes. Bugs still escape to production anyway. Not because the tests are poorly written, but because they test assumptions about how the system should behave, not observations of how it actually behaves. A regression test checks what a developer thinks will happen. Production reveals what actually happens. That gap is where escapes live. When a microservice changes its response format slightly, the test might still pass because it checks the expected structure, not the actual structure real clients use. When an integration point has undocumented implicit behavior, the test misses it. When two services interact in a timing pattern that only appears under load, the test does not catch it because it runs in isolation. Traditional regression testing writes test cases as predictions. A better approach captures what actually happens and tests against that. The...