zhukovsergei / phpunit-accelerator

Listeners to speed up PHPUnit tests

PHPUnit Accelerator

What I found is that PHPUnit is really hard to debug memory with, because it in itself keeps a lot of objects in memory before actually starting any test so the initial memory is jumping depending by the number of tests available - it creates a new test class instance for each test, so UserTest having 1k test declarations/function will result in 1k UserTest class instances before it actually starts processing them, which I'd say is more of a inefficiency from the PHPUnit side, the more tests you have the higher the starting memory will be.

Inspired by Kris Wallsmith faster PHPUnit article, we've created a PHPUnit test listener that speeds up PHPUnit tests about 20% by freeing memory.

Installation

To install this library, run the command below and you will get the latest version

composer require zhukovsergei/phpunit-accelerator --dev

Usage

Just add to your phpunit.xml configuration

<phpunit>
    <listeners>
        <listener class="\MyBuilder\PhpunitAccelerator\TestListener"/>
    </listeners>
</phpunit>

Ignoring Tests

Sometimes it is necessary to ignore specific tests, where freeing their properties is undesired. For this use case, you have the ability to extend the behaviour of the listener by implementing the IgnoreTestPolicy interface.

As an example, if we hypothetically wanted to ignore all tests which include "Legacy" in their test filename, we could create a custom ignore policy as follows

<?php

use MyBuilder\PhpunitAccelerator\IgnoreTestPolicy;

class IgnoreLegacyTestPolicy implements IgnoreTestPolicy {
    public function shouldIgnore(\ReflectionObject $testReflection) {
        return strpos($testReflection->getFilename(), 'Legacy') !== false;
    }
}

And pass it to the constructor of our test listener in phpunit.xml configuration

<phpunit>
    <listeners>
        <listener class="\MyBuilder\PhpunitAccelerator\TestListener">
            <arguments>
                <object class="\IgnoreLegacyTestPolicy"/>
            </arguments>
        </listener>
    </listeners>
</phpunit>

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Created by MyBuilder - Check out our blog for more insight into this and other open-source projects we release.