Testing Best Practices in Java

Fri, 03 Jul 2026 00:00:00 +0000

Introduction

Most Java codebases have plenty of tests and still get burned by production bugs. The problem is rarely quantity — it’s that the tests exercise the wrong things: they assert internal wiring instead of behavior, they mock away every collaborator until nothing real is left, or they cover the happy path ten times and the failure path zero times.

Good tests are fast, deterministic, and tell you something true about behavior. This post covers the practices that make JUnit 5 and Mockito tests actually earn their keep.

Testing Best Practices in Python

Fri, 03 Jul 2026 00:00:00 +0000

Introduction

Python’s testing tools are lightweight enough that it’s easy to write a lot of tests without writing good ones. A suite that mocks every collaborator, duplicates the same assertion ten times with different inputs pasted in by hand, or chases a coverage number will pass in CI and still miss real bugs.

pytest gives you fixtures, parametrize, and monkeypatch — the tools that make it just as easy to write the right tests as the wrong ones. This post covers how to use them well.

Testing on PG Blog

Testing Best Practices in Java

Introduction

Testing Best Practices in Python

Introduction