Continuous Delivery 2.0

Apr 6, 2022 · Fundamentals

How to Prevent Flaky Unit Tests by Managing Test Preconditions

Unstable test cases, caused by shared resources and unchecked assumptions, can mislead developers, hide real bugs, and lead to unfair blame, so this article explains why preconditions must be verified, demonstrates flaky test examples, and offers practical strategies such as resource cleanup, unique test resources, and mock file systems to achieve reliable testing.