test reliability

Continuous Delivery 2.0

Mar 28, 2022 · Fundamentals

Analyzing the Origins of Flaky Tests: Size, Tooling, and Instability at Google

This article examines why some tests become flaky, showing that larger test binaries and higher RAM usage strongly correlate with instability, while the choice of testing tools has a smaller effect, and offers recommendations for reducing flaky tests in large‑scale continuous integration environments.

Google testingcontinuous integrationflaky tests

0 likes · 9 min read

Analyzing the Origins of Flaky Tests: Size, Tooling, and Instability at Google

FunTester

Oct 9, 2021 · Fundamentals

Five Common Traps That Undermine Effective Unit Tests and How to Fix Them

This article explains five typical pitfalls that make unit tests ineffective—testing per function instead of behavior, chasing code‑coverage, over‑reliance on mocks, writing tests that never fail, and allowing nondeterminism—while offering practical guidance on how to avoid each issue.

Unit Testingcode coveragemocking

0 likes · 11 min read

Five Common Traps That Undermine Effective Unit Tests and How to Fix Them

Continuous Delivery 2.0

May 17, 2020 · Backend Development

Writing Effective End-to-End Automated Tests and Hermetic Testing

This article explains how to write robust end‑to‑end automated tests, emphasizes the importance of hermetic (sealed) testing environments, and provides practical guidelines, best‑practice recommendations, and considerations for maintaining reliable, fast, and maintainable test suites in complex web applications.

End-to-End Testingautomated testinghermetic testing

0 likes · 8 min read

Writing Effective End-to-End Automated Tests and Hermetic Testing

Youzan Coder

Apr 8, 2018 · Fundamentals

Testing Asynchronous Systems: Strategies and Best Practices

Testing asynchronous systems requires specialized strategies—monitoring callbacks with synchronization primitives and reliable polling with timeouts, delays, and frequencies—to handle nondeterministic execution, avoid flaky assertions, and improve testability by decoupling business logic from periodic scheduling, as demonstrated by real‑world polling implementations for Elasticsearch and MySQL/Redis jobs.

Java testingPollingUnit Testing

0 likes · 6 min read

Testing Asynchronous Systems: Strategies and Best Practices