Blog (6 of 18)
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Loving Legacy Code
Many developers want to "rewrite the whole application" and "get rid of all that sh*t". Most of them are pretty blank when I tell them that I really like working on such code bases, even if I just jumped into the code. I recently talked about that to the other Qafoo members and all of them agreed to my views. Therefore I want to explain our love of legacy code in this post.
Tuesday, 4 April 2017Read more ➞ -
How to Perform Extract Service Refactoring When You Don't Have Tests
When you are refactoring in a legacy codebase, the goal is often to reduce complexity or separate concerns from classes, methods and functions that do too much work themselves. Primary candidates for refactoring are often controller classes or use-case oriented service classes (such as a UserService). Extracting new service classes is one popular refactoring to separate concerns, but without tests it is dangerous because there are many ways to break your original code – we show you how this can still be done.
Tuesday, 21 March 2017Read more ➞ -
Basic Refactoring Techniques: Extract Method
Refactoring is the process of restructuring code without changing its behaviour and the technique "Extract Method" is one of the most important building blocks of refactoring. What do you need to keep in mind while doing this?
Tuesday, 7 March 2017Read more ➞ -
Extended Definition Of Done
When software projects grow it is considered helpful if the software follows an established structure so that every developer finds their way easily. If the used structures and patterns change per developer or even every couple of months or years it will get really hard to maintain the software. Let's discuss the reason for this and possible fixes.
Tuesday, 21 February 2017Read more ➞ -
Extracting Data Objects
Extracting data objects from your code will make it easier to read and write, easier to test and more forward compatible. This post shows you the two most common cases where introducing a data object makes sense and how to do it.
Tuesday, 7 February 2017Read more ➞ -
Refactoring Should not Only be a Ticket
In this blog post I would like to elaborate a bit further on why refactoring should never only be a dedicated task on your board. It should be an essential part of every task you work on…
Tuesday, 24 January 2017Read more ➞ -
Getting Rid of static
When people start (unit-)testing their code one of the worst problems to tackle are static calls. How can we refactor static calls out of an existing application without breaking the code and while producing new features? How can we get rid of this big test impediment?
Tuesday, 10 January 2017Read more ➞ -
Using Traits With PHPUnit
As we already wrote that "Code Reuse By Inheritance" has lots of problems and we consider it a code smell. You should always aim to use Dependency Injection, most likely Constructor Injection. But with test cases in PHPUnit we cannot do this because we have no control about how and when our test cases are created. There are a similar problem in other frameworks, like we discussed in "Object Lifecycle Control". We also blogged about traits as a Code Smell, but let me show and explain why they might be fine to use in your test cases.
Tuesday, 29 November 2016Read more ➞ -
Database Fixture Setup in PHPUnit
We already discussed when and how to reset a database between tests. But on top of that you often need some basic or more complex data to run the tests against. We discuss different variants and their respective trade-offs in this post…
Tuesday, 15 November 2016Read more ➞ -
Database Tests With PHPUnit
Most of us do not use PHPUnit solely for Unit Tests but we also write Integration or Acceptance Tests with PHPUnit. One very common question then is how to interact with the database correctly in those tests. Let me show you the different options and their trade offs…
Tuesday, 4 October 2016Read more ➞ -
Introduction To Page Objects
A while ago we wrote about writing acceptance tests (end-to-end tests) with Mink and PHPUnit. While this is a great set of tools for various applications such tests tend be susceptible to changes in the frontend. And the way they break is often hard to debug, too. Today I will introduce you to Page Objects which can solve some of these problems.
Tuesday, 6 September 2016Read more ➞ -
Scaling Constraints of Languages
Micro-Services or any set of small services are common again right now. While it is pretty obvious for most that selecting the right database is important the same is true for selecting the right language (virtual machine) for the job. There are different types of services or server applications where different types of virtual machines make more or less sense. What are the criteria we should base such a decision on and which language should we choose when?
Tuesday, 2 August 2016Read more ➞
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