How To Fix Flaky Tests in Rendering and Animation Workflows

UI rendering and animations are critical for creating interactive user experiences, but they can lead to flaky tests due to timing issues, environmental dependencies, and library dependencies. Flaky tests occur when animations, which often rely on timing functions like setTimeout or transition-duration, complete at unpredictable times, causing assertions to fail. Environmental factors such as system resources and network connectivity can also impact test reliability, as can the use of third-party libraries with compatibility issues or internal bugs. To address these challenges, the guide suggests using Jest and React testing libraries, employing strategies such as waiting for animations to complete with waitFor, ensuring compatibility between libraries and tech stacks, and focusing on smaller testing units. The guide provides real-world examples to illustrate common pitfalls and solutions, emphasizing the importance of reviewing test logic and using appropriate assertion methods to minimize test flakiness.