Posts

Differential serving with webpack encore

Recently we’ve been looking into differential serving. With our set up there were a few complications, so in this post i’ll share how we overcame those, and how to set up differential serving with webpack encore. If you want an explanation of what differential serving is, or how to do with with a normal webpack setup, i suggest reading this post. In our project we use webpack encore. We use a babel.

PHP needs an "unknown" type

If you are familiar with Typescript, you may know their any type. With any you can do anything. It signals that you don’t know about the actual type, and that anything goes. The following code is completely valid in Typescript. const doTheThing = (input: any) => { input + input; input.toString(); Object.keys(input).map((key) => { return input.foo[key]; }); const [one, two] = input; input(); } In Typescript 3.0 the unknown type was introduced.

Using CSS modules in react when testing with enzyme

Use CSS modules classes as selectors for your tests, and have better snapshots.

Testing Exceptions in PHPUnit

Last week i gave 10 phpunit tips. This week we’ll take a look at testing exceptions, which wasn’t covered in that post. Lets start with some example code that we will be testing. We have the Email and EmailValidator classes. Email is a value object that makes sure it is a valid email. We use the EmailValidator to make sure that the emails are only from our company. //Email.php final class Email { private function __construct( private string $email ){} public static function create(string $email): self { if (!

10 PHPUnit Tips

PHPUnit is the defacto testing framework for PHP. In this post i want to share with you my top 10 tips for PHPUnit. I’m using PHPUnit 9.5, but most of these apply to older versions as well. So, lets get this party started. 1: Stop using assertEquals One of the most common mistakes is using assertEquals. Instead, you should be using assertSame. When using equals we are doing an == check, instead of ===.

Help my Doctrine migrations are broken!

Recently we ran into a problem with doctrine migrations. The schema was manually edited, and wrong migrations were committed to the repository. For a dev (and even staging) env you could just drop the database, fix the migrations, and run them again. But we didn’t want to lose our production data. So how do we fix this? We really had 2 problems. Our migrations were wrong, and the (production) database was not in the correct state.

A problem with Twig

I’m a fan of twig, and wouldn’t consider moving back to plain php. But, it does come with a few problems. In this post we’ll explore one of the problems i have with twig, and how to work around it. The problem When you use a twig file, you do not know what variables it needs, what variables i can use, and what types those variables should be. You have to read the template, or execute it and see what errors you get.

Explore Your Types

Don’t worry, this isn’t a ‘what type of sandwich are you?’ kinda post. Instead we’ll look at how we can safely add types to our legacy code. Adding types There are really two ways of adding types. You either declare what you want your types to be, or you declare what the types can be. When writing new code we should always be precise in our types, so we declare what we want.

You should be using PHPStans bleeding edge

Does your project use PHPStan? Then you really should be using the bleeding edge config, regardless of what level you are running. It will make transition to the newer version much easier. What is bleeding edge To preserve backwards compatibility as much as possible, new rules, and new settings are delayed until the next major version. For example, using null coalesce on a variable that can not be null will be an error in the next version.

PHPUnit beyond basics: Dataproviders

Once you have set up your first unit tests, and you have a good configuration, its time to add a lot of tests. Lets take a look at using data providers, as a way to test with a lot of data. For this example we’ll test a piece of code that is supposed to do the following. Given the array ['a', 'b', 'c'], return the string a a-b a-b-c b b-c c.