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Tag Archives: Testing

No SRP? No TDD!

I’ve been thinking about what makes TDD fail, and there are obviously few reasons that were discussed to death (Get it? Dead? TDD? Ok, let’s move on). There’s a pattern I see when working with beginners. I’m talking about TDD beginners, because these people may have years of experience on them.  They follow the red-green steps religiously, and do minimal ...

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Writing Clean Tests – Divide and Conquer

A good unit test should fail for only one reason. This means that a proper unit test tests only one logical concept. If we want to write clean tests, we have to identify those logical concepts, and write only one test case per logical concept. This blog post describes how we can identify the logical concepts found from our tests, ...

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Testing effectively

Recently, there was a heaty debate regarding TDD which started by DHH when he claimed that TDD is dead. This ongoing debate managed to capture the attention of developers world, including us. Some mini debates have happened in our office regarding the right practices to do testing. In this article, I will present my own view.   How many kinds ...

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Writing Clean Tests – New Considered Harmful

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It is pretty hard to figure out a good definition for clean code because everyone of us has our own definition for the word clean. However, there is one definition which seems to be universal: Clean code is easy to read. This might come as a surprise to some of you, but I think that this definition applies to test ...

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Spice up your test code with custom assertions

Inspired by the @tkaczanowski talk during GeeCON conference I decided to have a closer look at custom assertions with AssertJ library. In my ‘Dice’ game I created a ‘Chance’ that is any combination of dice with the score calculated as a sum of all dice. This is relatively simple object:             class Chance implements Scorable ...

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Integration Tests for External Services

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Our systems often depend on 3rd party services (They may even be services internal to the company that we have no control on). Such services include Social Networks exposing APIs, SaaS with APIs like Salesforce, Authentication providers, or any system that our system communicates with, but is outside our product lifecycle. In regular integration tests, we would have an integration ...

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Writing Clean Tests – Beware of Magic

It is pretty hard to figure out a good definition for clean code because everyone of us has our own definition for the word clean. However, there is one definition which seems to be universal: Clean code is easy to read. This might come as a surprise to some of you, but I think that this definition applies to test ...

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What If I do This?

When I started my career as a developer, there were testers on my team. That was a new concept for me, since before that I didn’t need any testing, because I didn’t have any bugs. I learned to work with them, although they were a kind of an annoyance, since, suddenly, They discovered I had bugs. Jumping ahead a few ...

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