Mock Around the Clock

When I produced System Stubs I attempted, and failed, to produce a mock implementation for the system clock. It’s very…

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Why Most Unit Testing is Waste???

A rebuttal of points raised in this article by James O Coplien. It’s worth noting that James O Coplien is…

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All Our Assertion Problems

When our software outputs JSON, it can be hard to test. Consider this code: 1 2 assertThat(someJson)    .isEqualTo(expectedJson); Assuming the…

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The Right Kind of Failure

Basic question: why do we write our tests first and make sure they go red? Answer: because it’s possible that…

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It Looks Right To Me

When writing a test it’s important to test both positive and negative scenarios. It’s important to test edge cases. However,…

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A Java Test Class Doesn’t Test a Class

If you write tests badly, you end up with a Curdled Test Fixture, where there’s an unholy mess of unrelated…

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So I Wrote a Library

If you’ve never done it, go out and find an open-source project to contribute to. Whether it’s one of your…

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Chasing The Dragon

Functions should, ideally return something. It makes them easier to test. Same for services in a service architecture. Bosh! Chasing…

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The Three Stages of Knowledge

In software development, knowing how to do things seems to fall into three stages. Ok… let’s pretend it does, it’s…

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