PHPUnit - Data providers memory showcase

.gitignore

/vendor
composer.lock

composer.json

{
    "require": {
        "phpunit/phpunit": "8.2.3"
    }
}

DataProvidersMemoryTest.php

<?php

use PHPUnit\Framework\TestCase;

class DataProvidersMemoryTest extends TestCase
{
    /** @dataProvider stringProvider */
    public function testStringComplies(string $string): void
    {
        self::assertStringStartsWith('data:', $string);
    }

    public function stringProvider(): \Traversable
    {
        for ($i = 0 ; $i < 10000 ; $i++) {
            yield ['data:'.str_repeat('a', 8192)];
        }
    }
}

phpunit.xml

<?xml version="1.0" encoding="UTF-8"?>
<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/8.2/phpunit.xsd"
         backupGlobals="false"
         cacheResult="false"
>
    <testsuites>
        <testsuite name="Project Test Suite">
            <file>./DataProvidersMemoryTest.php</file>
        </testsuite>
    </testsuites>
</phpunit>